.page-about {
  --about-jade: #0E3B3A;
  --about-jade-deep: #082A29;
  --about-hair: rgba(233, 237, 247, 0.13);
  --about-cyan-soft: rgba(47, 211, 232, 0.16);
  --about-purple-soft: rgba(124, 77, 255, 0.2);
  position: relative;
  background: var(--void);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 18px 0 50px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -18% auto -12%;
  height: 420px;
  background:
    radial-gradient(58% 68% at 26% 28%, var(--about-cyan-soft), transparent 68%),
    radial-gradient(50% 60% at 80% 6%, var(--about-purple-soft), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-about .about-hero__copy h1 {
  margin: 10px 0 18px;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-about .about-hero__copy .lede {
  color: var(--silver);
  font-size: 17px;
}

.page-about .about-hero__note {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 30px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .about-hero__facts .mono {
  font-size: 24px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: 28px 28px 28px 6px;
  overflow: hidden;
  border: 1px solid var(--line-cyan);
  box-shadow: 0 40px 90px -62px rgba(47, 211, 232, 0.9);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 34px 0 86px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 58px;
    align-items: center;
  }

  .page-about .about-hero__figure {
    order: -1;
    margin-top: 42px;
  }
}

/* ---------- 主张 ---------- */
.page-about .about-claim {
  padding: 30px 0;
}

.page-about .about-claim__inner {
  position: relative;
  padding: 36px 22px 38px;
  border-radius: 46px 14px 46px 14px;
  border: 1px solid rgba(47, 211, 232, 0.2);
  background:
    radial-gradient(92% 122% at 8% 0%, rgba(47, 211, 232, 0.18), transparent 62%),
    linear-gradient(155deg, var(--about-jade) 0%, var(--about-jade-deep) 58%, var(--void) 100%);
}

.page-about .about-claim__inner h2 {
  margin: 8px 0 20px;
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.32;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--silver);
}

.page-about .about-claim__inner p {
  margin: 0 0 16px;
  max-width: 46em;
  font-size: 15.5px;
  line-height: 1.92;
  color: var(--mist);
}

.page-about .about-claim__inner p:first-of-type {
  font-size: 17px;
  color: var(--silver);
}

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

@media (min-width: 900px) {
  .page-about .about-claim__inner {
    padding: 54px 56px 58px;
  }
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding: 46px 0 26px;
}

.page-about .about-timeline .section-head {
  margin-bottom: 26px;
}

.page-about .about-timeline__figure {
  margin: 0 0 32px;
  border-radius: 6px 28px 6px 28px;
  overflow: hidden;
  border: 1px solid var(--about-hair);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-timeline__track {
  position: relative;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(134px, 1fr);
  gap: 0;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-top: 2px solid rgba(47, 211, 232, 0.26);
}

.page-about .about-timeline__node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 78px;
  padding: 26px 16px 6px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
  text-decoration: none;
  transition: color 240ms var(--ease);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--cyan);
  transition: background-color 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-about .about-timeline__node .mono {
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-about .about-timeline__node:hover,
.page-about .about-timeline__node:focus-visible {
  color: var(--silver);
}

.page-about .about-timeline__node:hover::before,
.page-about .about-timeline__node:focus-visible::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(47, 211, 232, 0.16);
}

.page-about .about-timeline__stages {
  display: grid;
  gap: 16px;
}

.page-about .about-stage {
  padding: 20px 20px 22px;
  background: var(--panel-2);
  border: 1px solid var(--about-hair);
  border-left: 2px solid var(--cyan);
  border-radius: 4px 22px 22px 4px;
  scroll-margin-top: 96px;
  transition: background-color 260ms var(--ease), border-color 260ms var(--ease);
}

.page-about .about-stage:target {
  background: rgba(255, 154, 69, 0.07);
  border-left-color: var(--amber);
}

.page-about .about-stage__idx {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-stage h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--silver);
}

.page-about .about-stage p {
  margin: 0;
  font-size: 15px;
  line-height: 1.87;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-timeline__track {
    grid-auto-flow: row;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    overflow: visible;
  }

  .page-about .about-timeline__stages {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 46px 0;
}

.page-about .about-team__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-team__copy h2 {
  margin: 8px 0 16px;
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.32;
  font-weight: 800;
  color: var(--silver);
}

.page-about .about-team__copy p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mist);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 26px 8px 26px 26px;
  border: 1px solid var(--about-hair);
}

.page-about .about-team__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: var(--mist);
}

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

.page-about .about-bar__track {
  display: flex;
  height: 14px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--about-hair);
}

.page-about .about-bar__seg {
  display: block;
  height: 100%;
}

.page-about .about-bar__seg--main {
  width: 55%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
}

.page-about .about-bar__seg--rest {
  width: 45%;
  background: rgba(152, 163, 191, 0.34);
}

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

.page-about .about-bar__legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--mist);
  transition: color 240ms var(--ease);
}

.page-about .about-bar__legend li:hover {
  color: var(--silver);
}

.page-about .about-bar__key {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-bar__key--rest {
  background: rgba(152, 163, 191, 0.5);
}

.page-about .about-bar__legend .mono {
  margin-left: auto;
  font-size: 13px;
  color: var(--cyan);
}

@media (min-width: 1024px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 50px;
    align-items: start;
  }
}

/* ---------- 协作生态 ---------- */
.page-about .about-eco {
  padding: 40px 0;
}

.page-about .about-eco__grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .about-eco__card {
  padding: 22px 20px 24px;
  border-radius: 24px 24px 6px 24px;
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  border: 1px solid var(--about-hair);
  transition: border-color 260ms var(--ease);
}

.page-about .about-eco__card:hover {
  border-color: var(--line-cyan);
}

.page-about .about-eco__idx {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-eco__card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--silver);
}

.page-about .about-eco__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-eco__cta {
  margin: 26px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-eco__cta a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  transition: color 240ms var(--ease);
}

.page-about .about-eco__cta a:hover,
.page-about .about-eco__cta a:focus-visible {
  color: var(--silver);
}

@media (min-width: 900px) {
  .page-about .about-eco__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-eco__card:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-eco__card:nth-child(3) {
    margin-top: 52px;
  }
}

/* ---------- 服务节奏 ---------- */
.page-about .about-cadence {
  padding: 46px 0;
}

.page-about .about-cadence__grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-cadence__item {
  padding: 20px;
  border-radius: 18px;
  background: rgba(16, 23, 49, 0.72);
  border: 1px solid var(--about-hair);
  border-top: 2px solid rgba(255, 154, 69, 0.42);
}

.page-about .about-cadence__num {
  margin: 0 0 12px;
  font-size: clamp(24px, 6vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--amber);
}

.page-about .about-cadence__item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--silver);
}

.page-about .about-cadence__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cadence__folds {
  margin-top: 32px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-cadence__folds .fold {
  border-bottom: 1px solid var(--about-hair);
}

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

@media (min-width: 1080px) {
  .page-about .about-cadence__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 资质与备案 ---------- */
.page-about .about-credits {
  padding: 34px 0 62px;
}

.page-about .about-credits__box {
  padding: 26px 22px 30px;
  border-radius: 30px 30px 8px 30px;
  border: 1px solid rgba(243, 208, 138, 0.22);
  background: linear-gradient(150deg, rgba(58, 16, 48, 0.42), rgba(7, 11, 24, 0.92));
}

.page-about .about-credits__box h2 {
  margin: 8px 0 18px;
  font-size: clamp(21px, 4vw, 27px);
  line-height: 1.35;
  font-weight: 700;
  color: var(--silver);
}

.page-about .about-credits__list {
  display: grid;
  gap: 14px;
  margin: 0;
}

.page-about .about-credits__list > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(233, 237, 247, 0.1);
}

.page-about .about-credits__list dt {
  min-width: 88px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-credits__list dd {
  margin: 0;
  font-size: 15px;
  color: var(--silver);
  word-break: break-word;
}

.page-about .about-credits__list .mono {
  color: var(--gold);
  letter-spacing: 0.04em;
}

@media (min-width: 720px) {
  .page-about .about-credits__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 36px;
  }

  .page-about .about-credits__box {
    padding: 34px 34px 36px;
  }
}
</main>