/* ===== 品牌坐标 / page-about ===== */

.page-about {
  position: relative;
  isolation: isolate;
  overflow-x: clip;
  --about-pad: clamp(20px, 3.2vw, 34px);
  --about-glow-a: radial-gradient(115% 70% at 6% 0%, rgba(34, 211, 238, 0.16), transparent 62%);
  --about-glow-b: radial-gradient(90% 62% at 98% 10%, rgba(167, 139, 250, 0.15), transparent 60%);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: min(640px, 80vh);
  background-image: var(--about-glow-a), var(--about-glow-b);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 2.6vw, 28px);
}

.page-about .about-head {
  max-width: 760px;
}

/* ---------- 首屏 ---------- */

.page-about .about-open {
  padding-top: clamp(20px, 3.4vw, 38px);
}

.page-about .about-open__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
}

.page-about .about-open__statement {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3.6vw, 46px);
}

.page-about .about-open__statement::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.22), transparent 68%);
  pointer-events: none;
}

.page-about .about-open__statement .yy-h1 {
  max-width: 16ch;
}

.page-about .about-open__facts {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-open__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-open__index {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 2.8vw, 30px);
}

.page-about .about-open__index-title {
  margin: 0 0 14px;
  font-family: var(--yy-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--yy-muted);
}

.page-about .about-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--yy-radius-sm);
  border: 1px solid transparent;
  color: var(--yy-text);
  text-decoration: none;
  transition: background var(--yy-fast) var(--yy-ease),
    border-color var(--yy-fast) var(--yy-ease),
    transform var(--yy-fast) var(--yy-ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: rgba(34, 211, 238, 0.08);
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateX(3px);
}

.page-about .about-index__num {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--yy-cyan);
}

.page-about .about-index__label {
  font-size: 0.95rem;
  line-height: 1.5;
}

.page-about .about-index__arrow {
  font-size: 0.85rem;
  color: var(--yy-muted);
}

.page-about .about-open__index-note {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
}

/* ---------- 品牌落地 ---------- */

.page-about .about-landing__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.2vw, 24px);
}

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

.page-about .about-landing__side {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.2vw, 24px);
  align-content: start;
}

.page-about .about-note-card {
  padding: var(--about-pad);
}

.page-about .about-note-card__idx {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--yy-purple);
}

.page-about .about-note-card .yy-h3 {
  margin: 0 0 8px;
}

.page-about .about-note-card p {
  margin: 0;
  color: var(--yy-muted);
  line-height: 1.8;
}

.page-about .about-note-card--offset {
  border-left: 2px solid rgba(167, 139, 250, 0.45);
}

/* ---------- 发展历程 ---------- */

.page-about .about-history__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 6px 0 6px 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(
    180deg,
    var(--yy-cyan) 0%,
    rgba(34, 211, 238, 0.28) 45%,
    rgba(167, 139, 250, 0.6) 100%
  );
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(22px, 3.6vw, 36px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--yy-indigo);
  border: 2px solid var(--yy-cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.1);
  transition: box-shadow var(--yy-mid) var(--yy-ease), border-color var(--yy-mid) var(--yy-ease);
}

.page-about .about-timeline__item:hover::before {
  border-color: var(--yy-orange);
  box-shadow: 0 0 0 6px rgba(251, 146, 60, 0.12);
}

.page-about .about-timeline__stage {
  margin: 0 0 4px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--yy-cyan);
}

.page-about .about-timeline__item .yy-h3 {
  margin: 0 0 6px;
}

.page-about .about-timeline__item p:last-child {
  margin: 0;
  max-width: 52ch;
  color: var(--yy-muted);
  line-height: 1.8;
}

.page-about .about-history__media {
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.page-about .about-history__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-history__cap {
  padding: 14px var(--about-pad) 18px;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--yy-muted);
  border-top: 1px solid var(--yy-line);
}

/* ---------- 服务能力 ---------- */

.page-about .about-capability__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.2vw, 24px);
}

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

.page-about .about-capability__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
  align-content: start;
}

.page-about .about-stat {
  padding: var(--about-pad);
  border-left: 3px solid var(--yy-cyan);
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--yy-font-mono);
  font-size: clamp(1.7rem, 5vw, 2.3rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--yy-cyan);
}

.page-about .about-stat__label {
  margin: 6px 0 0;
  font-size: 0.95rem;
  color: var(--yy-text);
}

.page-about .about-stat__text {
  margin: 8px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--yy-muted);
}

.page-about .about-stat--purple {
  border-left-color: var(--yy-purple);
}
.page-about .about-stat--purple .about-stat__num {
  color: var(--yy-purple);
}

.page-about .about-stat--orange {
  border-left-color: var(--yy-orange);
}
.page-about .about-stat--orange .about-stat__num {
  color: var(--yy-orange);
}

.page-about .about-stat--green {
  border-left-color: var(--yy-green);
}
.page-about .about-stat--green .about-stat__num {
  color: var(--yy-green);
}

/* ---------- 合作与支持 ---------- */

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .about-eco__accordion .yy-accordion__label {
  font-weight: 600;
}

.page-about .about-eco__support {
  align-self: start;
  padding: var(--about-pad);
  background: linear-gradient(
      160deg,
      rgba(251, 146, 60, 0.1),
      rgba(167, 139, 250, 0.08) 55%,
      rgba(10, 18, 48, 0) 100%
    ),
    var(--yy-indigo-soft);
}

.page-about .about-eco__support-kicker {
  margin: 0 0 10px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--yy-orange);
}

.page-about .about-eco__support .yy-h3 {
  margin: 0 0 10px;
}

.page-about .about-eco__support p {
  margin: 0 0 12px;
  line-height: 1.8;
  color: var(--yy-muted);
}

.page-about .about-eco__mail {
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  color: var(--yy-text);
  word-break: break-all;
}

.page-about .about-eco__support-foot {
  margin-top: 14px;
  font-size: 0.88rem;
  line-height: 1.75;
}

.page-about .about-eco__support .yy-btn--block {
  margin-top: 12px;
}

/* ---------- 下一步 ---------- */

.page-about .about-next__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 52px);
  border-radius: var(--yy-radius);
  border: 1px solid rgba(34, 211, 238, 0.28);
  background: linear-gradient(
      120deg,
      rgba(34, 211, 238, 0.14),
      rgba(167, 139, 250, 0.12) 52%,
      rgba(251, 146, 60, 0.1) 100%
    ),
    var(--yy-indigo-soft);
}

.page-about .about-next__kicker {
  margin: 0 0 12px;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--yy-cyan);
}

.page-about .about-next__panel .yy-h2 {
  margin: 0 0 12px;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 62ch;
  line-height: 1.85;
  color: var(--yy-muted);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-capability__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .about-open__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .about-open__index {
    justify-content: space-between;
  }

  .page-about .about-landing__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-landing__side > :nth-child(2) {
    margin-left: clamp(18px, 3vw, 46px);
  }

  .page-about .about-history__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-history__media {
    position: sticky;
    top: calc(var(--yy-header-h) + 28px);
  }

  .page-about .about-capability__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-capability__stats > :nth-child(2),
  .page-about .about-capability__stats > :nth-child(4) {
    margin-top: clamp(16px, 2.6vw, 34px);
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-about .about-open__statement .yy-h1 {
    max-width: 15ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-timeline__item::before {
    transition: none;
  }
}
<<<END>>>