.page-about {
  --about-num-size: clamp(52px, 11vw, 132px);
  position: relative;
  overflow-x: hidden;
  color: var(--gx-silver);
  background:
    radial-gradient(1100px 620px at 84% -6%, rgba(122, 92, 255, .2), transparent 62%),
    radial-gradient(760px 520px at 4% 16%, rgba(47, 230, 213, .1), transparent 66%),
    var(--gx-void);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--gx-header-h) + clamp(36px, 7vw, 84px));
}

.page-about .about-hero__title {
  margin-top: clamp(10px, 2vw, 18px);
  max-width: 18ch;
  text-shadow: 0 0 48px rgba(122, 92, 255, .42);
}

.page-about .about-hero__lead {
  margin-top: clamp(14px, 2vw, 20px);
  max-width: 60ch;
  color: rgba(244, 247, 255, .78);
}

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

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-about .about-jump__item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--gx-line);
  border-radius: 999px;
  color: var(--gx-mute);
  font-size: .86rem;
  text-decoration: none;
  transition: color .28s var(--gx-ease), border-color .28s var(--gx-ease), background-color .28s var(--gx-ease);
}

.page-about .about-jump__item:hover,
.page-about .about-jump__item:focus-visible {
  color: var(--gx-cyan);
  border-color: rgba(47, 230, 213, .5);
  background: rgba(47, 230, 213, .07);
}

.page-about .about-jump__num {
  font-family: var(--gx-font-mono);
  font-size: .76rem;
  color: var(--gx-pink);
}

.page-about .about-hero__banner {
  position: relative;
  margin: clamp(30px, 5vw, 58px) 0 0;
  overflow: hidden;
}

.page-about .about-hero__banner img {
  display: block;
  width: 100%;
  height: clamp(200px, 40vw, 470px);
  object-fit: cover;
  opacity: .82;
}

.page-about .about-hero__banner::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(5, 11, 31, .92) 0%, rgba(5, 11, 31, .12) 38%, rgba(5, 11, 31, .6) 80%, var(--gx-void) 100%),
    linear-gradient(90deg, rgba(5, 11, 31, .8), transparent 46%);
}

.page-about .about-hero__stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(-54px, -4vw, -24px);
  background: var(--gx-line);
  border: 1px solid var(--gx-line);
  border-radius: var(--gx-radius-lg);
  overflow: hidden;
}

.page-about .about-hero__stats .gx-stat {
  padding: clamp(16px, 2.4vw, 24px);
  background: linear-gradient(160deg, rgba(14, 27, 60, .96), rgba(5, 11, 31, .94));
}

.page-about .about-hero__stats .gx-stat__num {
  display: block;
  font-family: var(--gx-font-mono);
  font-size: clamp(1.6rem, 3.6vw, 2.15rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--gx-gold);
}

.page-about .about-hero__stats .gx-stat__label {
  display: block;
  margin-top: 8px;
  font-size: .84rem;
  line-height: 1.55;
  color: var(--gx-mute);
}

/* ============ 章节骨架 ============ */
.page-about .about-chapter__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 2vw, 24px);
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--gx-font-head);
  font-size: var(--about-num-size);
  font-weight: 900;
  line-height: .8;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(122, 92, 255, .6);
  opacity: .62;
  user-select: none;
}

.page-about .about-chapter__head {
  margin-bottom: clamp(22px, 3.4vw, 36px);
}

.page-about .about-chapter__head h2 {
  max-width: 26ch;
}

.page-about .about-chapter__text {
  margin-top: clamp(12px, 1.8vw, 18px);
  max-width: 62ch;
  color: var(--gx-mute);
  line-height: 1.78;
}

/* ============ 01 时间轴 ============ */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(47, 230, 213, 0), rgba(47, 230, 213, .65) 8%, rgba(122, 92, 255, .6) 86%, rgba(122, 92, 255, 0));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(20px, 3vw, 32px) 44px;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: 2px;
  top: 8px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--gx-void);
  border: 2px solid var(--gx-cyan);
  box-shadow: 0 0 0 4px rgba(47, 230, 213, .12), 0 0 18px -2px rgba(47, 230, 213, .9);
  transition: box-shadow .3s var(--gx-ease), transform .3s var(--gx-ease);
}

.page-about .about-timeline__card {
  position: relative;
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--gx-line);
  border-left: 2px solid rgba(122, 92, 255, .55);
  border-radius: var(--gx-radius);
  background: linear-gradient(150deg, rgba(14, 27, 60, .94), rgba(5, 11, 31, .88));
  transition: transform .34s var(--gx-ease), border-color .34s var(--gx-ease), box-shadow .34s var(--gx-ease);
}

.page-about .about-timeline__item:hover .about-timeline__card,
.page-about .about-timeline__item:focus-within .about-timeline__card {
  transform: translateY(-4px);
  border-color: rgba(47, 230, 213, .42);
  border-left-color: var(--gx-cyan);
  box-shadow: var(--gx-glow-cyan);
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  transform: scale(1.18);
  box-shadow: 0 0 0 6px rgba(47, 230, 213, .16), 0 0 26px 0 rgba(47, 230, 213, 1);
}

.page-about .about-timeline__when {
  margin: 0 0 6px;
  font-family: var(--gx-font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--gx-pink);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--gx-font-head);
  font-size: clamp(1.03rem, 1.9vw, 1.2rem);
  font-weight: 700;
  line-height: 1.42;
  color: var(--gx-silver);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--gx-mute);
}

/* ============ 02 三条业务主线 ============ */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 22px);
}

.page-about .about-line {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--gx-line);
  border-radius: var(--gx-radius-lg);
  background: linear-gradient(165deg, rgba(14, 27, 60, .92), rgba(5, 11, 31, .9));
  overflow: hidden;
  transition: transform .34s var(--gx-ease), border-color .34s var(--gx-ease), box-shadow .34s var(--gx-ease);
}

.page-about .about-line::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--about-accent, var(--gx-violet)), transparent 82%);
}

.page-about .about-line--adapt { --about-accent: var(--gx-violet); }
.page-about .about-line--library { --about-accent: var(--gx-cyan); }
.page-about .about-line--license { --about-accent: var(--gx-pink); }

.page-about .about-line:hover,
.page-about .about-line:focus-within {
  transform: translateY(-5px);
  border-color: rgba(47, 230, 213, .4);
  box-shadow: var(--gx-glow-cyan);
}

.page-about .about-line__title {
  margin: 0;
  font-family: var(--gx-font-head);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  font-weight: 800;
  line-height: 1.36;
  color: var(--gx-silver);
}

.page-about .about-line__text {
  margin: 0;
  font-size: .93rem;
  line-height: 1.72;
  color: var(--gx-mute);
}

.page-about .about-line__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  font-size: .9rem;
  line-height: 1.62;
  color: var(--gx-mute);
}

.page-about .about-line__list li {
  position: relative;
  padding-left: 16px;
}

.page-about .about-line__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gx-cyan);
  box-shadow: 0 0 10px rgba(47, 230, 213, .8);
}

.page-about .about-line__link {
  margin-top: auto;
  align-self: flex-start;
  padding-bottom: 2px;
  font-size: .89rem;
  color: var(--gx-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 230, 213, .35);
  transition: border-color .28s var(--gx-ease), color .28s var(--gx-ease);
}

.page-about .about-line__link:hover,
.page-about .about-line__link:focus-visible {
  color: var(--gx-pink);
  border-color: var(--gx-pink);
}

/* ============ 03 团队与服务能力 ============ */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-team__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--gx-line);
  border-radius: var(--gx-radius-lg);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: clamp(200px, 30vw, 330px);
  object-fit: cover;
  opacity: .88;
}

.page-about .about-team__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 70px -12px rgba(122, 92, 255, .55);
}

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  background: var(--gx-line);
  border: 1px solid var(--gx-line);
  border-radius: var(--gx-radius);
  overflow: hidden;
}

.page-about .about-roles > div {
  padding: 14px 16px;
  background: linear-gradient(150deg, rgba(14, 27, 60, .9), rgba(5, 11, 31, .88));
}

.page-about .about-roles dt {
  margin-bottom: 5px;
  font-family: var(--gx-font-head);
  font-size: .95rem;
  font-weight: 700;
  color: var(--gx-cyan);
}

.page-about .about-roles dd {
  margin: 0;
  font-size: .89rem;
  line-height: 1.66;
  color: var(--gx-mute);
}

.page-about .about-sla {
  margin-top: clamp(18px, 2.6vw, 26px);
  padding: clamp(16px, 2.4vw, 22px);
  border: 1px solid rgba(47, 230, 213, .28);
  border-radius: var(--gx-radius);
  background: linear-gradient(140deg, rgba(47, 230, 213, .09), rgba(122, 92, 255, .07));
}

.page-about .about-sla__title {
  margin: 0 0 10px;
  font-family: var(--gx-font-head);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--gx-silver);
}

.page-about .about-sla__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
  font-size: .9rem;
  line-height: 1.66;
  color: var(--gx-mute);
}

.page-about .about-sla__list li {
  position: relative;
  padding-left: 18px;
  word-break: break-word;
}

.page-about .about-sla__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .62em;
  width: 8px;
  height: 1px;
  background: var(--gx-cyan);
  box-shadow: 0 0 8px rgba(47, 230, 213, .9);
}

/* ============ 04 合作生态 ============ */
.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

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

.page-about .about-eco__stats li {
  padding: clamp(14px, 2vw, 20px);
  background: linear-gradient(155deg, rgba(14, 27, 60, .92), rgba(5, 11, 31, .9));
}

.page-about .about-eco__stats .gx-stat__num {
  display: block;
  font-family: var(--gx-font-mono);
  font-size: clamp(1.5rem, 3vw, 1.95rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--gx-gold);
}

.page-about .about-eco__stats .gx-stat__label {
  display: block;
  margin-top: 6px;
  font-size: .84rem;
  color: var(--gx-mute);
}

.page-about .about-regions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(16px, 2.4vw, 22px);
}

.page-about .about-eco__note {
  margin: clamp(14px, 2vw, 18px) 0 0;
  max-width: 56ch;
  font-size: .92rem;
  line-height: 1.74;
  color: var(--gx-mute);
}

.page-about .about-eco__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--gx-line);
  border-radius: var(--gx-radius-lg);
  overflow: hidden;
  background: var(--gx-deep);
}

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  height: clamp(210px, 32vw, 350px);
  object-fit: cover;
  opacity: .85;
}

/* ============ 05 银河周期 ============ */
.page-about .about-cycle {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 20px);
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
}

.page-about .about-cycle__phase {
  position: relative;
  padding: clamp(18px, 2.4vw, 24px);
  border-radius: var(--gx-radius);
  background: var(--gx-paper);
  color: #101736;
  box-shadow: 0 20px 44px -30px rgba(0, 0, 0, .95);
  transition: transform .34s var(--gx-ease), box-shadow .34s var(--gx-ease);
}

.page-about .about-cycle__phase::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(16, 23, 54, .16);
  border-radius: 6px;
  pointer-events: none;
}

.page-about .about-cycle__phase:hover {
  transform: translateY(-5px);
  box-shadow: 0 26px 50px -26px rgba(122, 92, 255, .75);
}

.page-about .about-cycle__badge {
  display: inline-block;
  padding: 3px 11px;
  border-radius: 999px;
  background: #101736;
  color: var(--gx-cyan);
  font-family: var(--gx-font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
}

.page-about .about-cycle__title {
  margin: 12px 0 8px;
  font-family: var(--gx-font-head);
  font-size: clamp(1.05rem, 2vw, 1.24rem);
  font-weight: 800;
  line-height: 1.38;
  color: #0b1230;
}

.page-about .about-cycle__text {
  margin: 0;
  font-size: .89rem;
  line-height: 1.7;
  color: #3d4763;
}

/* ============ 结尾入口 ============ */
.page-about .about-cta__inner {
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--gx-line-strong);
  border-radius: var(--gx-radius-lg);
  background:
    radial-gradient(620px 300px at 88% 0%, rgba(255, 122, 217, .16), transparent 62%),
    linear-gradient(150deg, rgba(14, 27, 60, .96), rgba(5, 11, 31, .96));
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--gx-font-head);
  font-size: clamp(1.4rem, 3.4vw, 2.05rem);
  font-weight: 800;
  line-height: 1.28;
  color: var(--gx-silver);
}

.page-about .about-cta__text {
  margin: clamp(12px, 1.8vw, 18px) 0 0;
  max-width: 58ch;
  font-size: .96rem;
  line-height: 1.78;
  color: var(--gx-mute);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-eco__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-cycle {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: center;
  }
  .page-about .about-team__figure img {
    height: clamp(280px, 34vw, 400px);
  }
  .page-about .about-eco {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr);
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-about .about-chapter__inner {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: clamp(30px, 5vw, 72px);
    align-items: start;
  }
  .page-about .about-chapter__body {
    max-width: 74ch;
  }
  .page-about .about-chapter--wide .about-chapter__body {
    max-width: none;
  }
}

@media (min-width: 1080px) {
  .page-about .about-cycle {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-cycle__phase:nth-child(even) {
    margin-top: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-timeline__card,
  .page-about .about-timeline__dot,
  .page-about .about-cycle__phase,
  .page-about .about-jump__item {
    transition: none;
  }
  .page-about .about-line:hover,
  .page-about .about-line:focus-within,
  .page-about .about-timeline__item:hover .about-timeline__card,
  .page-about .about-cycle__phase:hover {
    transform: none;
  }
}