/* ===== 品牌档案 page-about 专属 ===== */
.page-about {
  --about-rail-w: 11rem;
  --about-gap: 2rem;
  background-color: var(--c-deep);
  color: var(--c-white);
  font-family: var(--f-body);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-container {
  width: min(1200px, calc(100% - 3rem));
  margin-inline: auto;
  padding-block: 4rem 4.5rem;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--f-head);
  line-height: 1.14;
  color: var(--c-white);
}

.page-about h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  margin: 0.35rem 0 1rem;
}

.page-about h2 {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  margin: 0 0 1.25rem;
}

.page-about h3 {
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.page-about .about-index {
  font-family: var(--f-num);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-about .about-label {
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  color: var(--c-silver);
  text-transform: uppercase;
}

/* Hero */
.page-about .about-hero {
  position: relative;
  background: linear-gradient(140deg, var(--c-deep-2), var(--c-deep) 52%, var(--c-night) 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 18%, rgba(255, 215, 0, 0.16), transparent 28%),
    radial-gradient(circle at 28% 85%, rgba(0, 200, 232, 0.14), transparent 34%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 34%;
  background: linear-gradient(150deg, transparent 42%, rgba(0, 200, 232, 0.08) 42.5%, transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__container {
  padding-block: 3rem 4rem;
}

.page-about .about-hero__grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.page-about .about-hero__aside {
  order: 2;
}

.page-about .about-hero__main {
  order: 1;
}

.page-about .about-hero__figure {
  margin: 1.5rem 0 0;
}

.page-about .about-hero__figure img {
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: var(--shadow-lg);
}

.page-about .about-hero__eyebrow {
  margin: 1.25rem 0 0;
  font-family: var(--f-head);
  font-size: 0.9rem;
  letter-spacing: 0.26em;
  color: var(--c-gold);
}

.page-about .about-hero__brand {
  color: var(--c-gold);
}

.page-about .about-hero__lead {
  max-width: 36em;
  margin: 1rem 0 1.5rem;
  color: var(--c-silver);
  font-size: 1.02rem;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .about-hero__stat-num {
  font-family: var(--f-num);
  font-size: 2rem;
  line-height: 1;
  color: var(--c-white);
}

/* 品牌缘起 */
.page-about .about-origin {
  background: var(--c-sand);
  color: var(--c-deep-2);
}

.page-about .about-origin h2,
.page-about .about-origin h3 {
  color: var(--c-deep-2);
}

.page-about .about-origin .about-label {
  color: var(--c-deep-2);
}

.page-about .about-origin .about-index {
  color: var(--c-orange);
}

.page-about .about-origin__grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-origin__content p {
  margin: 0 0 1.1rem;
  color: #2c3a54;
}

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

/* 里程碑 */
.page-about .about-timeline {
  position: relative;
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 215, 0, 0.1), transparent 24%),
    radial-gradient(circle at 8% 92%, rgba(0, 200, 232, 0.12), transparent 30%),
    linear-gradient(180deg, var(--c-deep) 0%, var(--c-deep-2) 45%, var(--c-night) 100%);
}

.page-about .about-timeline__header {
  display: grid;
  gap: 0.5rem;
}

.page-about .about-timeline__intro p {
  max-width: 46em;
  margin: 0;
  color: var(--c-silver);
}

.page-about .about-timeline__track {
  position: relative;
  margin-top: 2.75rem;
}

.page-about .about-timeline__track::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  bottom: 0.25rem;
  left: 1rem;
  width: 2px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-gold), var(--c-orange));
  opacity: 0.35;
  transform: translateX(-50%);
}

.page-about .timeline-item {
  position: relative;
  padding-left: 3.5rem;
  padding-bottom: 2rem;
}

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

.page-about .timeline-item__node {
  position: absolute;
  top: 0.2rem;
  left: 1rem;
  width: 2.8rem;
  height: 2.8rem;
  display: grid;
  place-items: center;
  background: var(--c-deep-2);
  border: 1px solid var(--c-silver);
  border-radius: var(--radius);
  color: var(--c-silver);
  font-family: var(--f-head);
  font-size: 0.95rem;
  transform: translateX(-50%);
  transition: box-shadow var(--ease), border-color var(--ease), transform var(--ease);
}

.page-about .timeline-item--v2 .timeline-item__node {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
  background: rgba(0, 200, 232, 0.08);
}

.page-about .timeline-item--v3 .timeline-item__node {
  border-color: var(--c-gold);
  color: var(--c-gold);
  background: rgba(255, 215, 0, 0.12);
}

.page-about .timeline-item:hover .timeline-item__node {
  border-color: var(--c-gold);
  box-shadow: 0 0 0 5px rgba(255, 215, 0, 0.12), 0 0 24px rgba(255, 215, 0, 0.18);
  transform: translateX(-50%) scale(1.06);
}

.page-about .timeline-item__panel {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(176, 184, 196, 0.24);
  border-radius: var(--radius);
  transition: border-color var(--ease), background var(--ease);
}

.page-about .timeline-item__panel[open] {
  border-color: rgba(255, 215, 0, 0.35);
  background: rgba(255, 255, 255, 0.06);
}

.page-about .timeline-item__summary {
  list-style: none;
  cursor: pointer;
  padding: 1.15rem 1.2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.9rem;
}

.page-about .timeline-item__summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline-item__season {
  font-family: var(--f-num);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
  border: 1px solid rgba(0, 200, 232, 0.4);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
}

.page-about .timeline-item__name {
  font-family: var(--f-head);
  font-size: 1.05rem;
  color: var(--c-white);
}

.page-about .timeline-item__arrow {
  margin-left: auto;
  color: var(--c-orange);
  font-family: var(--f-num);
  font-size: 1.15rem;
  line-height: 1;
  transition: transform var(--ease);
}

.page-about .timeline-item__panel[open] .timeline-item__arrow {
  transform: rotate(45deg);
}

.page-about .timeline-item__body {
  padding: 0 1.25rem 1.2rem;
}

.page-about .timeline-item__body p {
  margin: 0;
  max-width: 46em;
  color: var(--c-silver);
  font-size: 0.95rem;
}

/* 数据能力 */
.page-about .about-data {
  background: var(--c-deep);
  border-top: 1px solid rgba(176, 184, 196, 0.14);
  border-bottom: 1px solid rgba(176, 184, 196, 0.14);
}

.page-about .about-data__head {
  display: grid;
  gap: 0.5rem;
}

.page-about .about-data__intro p {
  max-width: 46em;
  margin: 0;
  color: var(--c-silver);
}

.page-about .about-data__stats {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(176, 184, 196, 0.22);
  border: 1px solid rgba(176, 184, 196, 0.22);
}

.page-about .about-data__stat {
  background: var(--c-deep);
  padding: 1.35rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
}

.page-about .about-data__stat-num {
  font-family: var(--f-num);
  font-size: 1.9rem;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .about-data__stat-label {
  color: var(--c-silver);
  font-size: 0.82rem;
}

.page-about .about-data__figure {
  margin: 2.5rem 0 0;
}

.page-about .about-data__figure img {
  border-radius: var(--radius);
  border: 1px solid rgba(176, 184, 196, 0.24);
  box-shadow: var(--shadow-lg);
}

/* 团队与组织 */
.page-about .about-team {
  background: var(--c-sand);
  color: var(--c-deep-2);
}

.page-about .about-team h2,
.page-about .about-team h3 {
  color: var(--c-deep-2);
}

.page-about .about-team .about-label {
  color: var(--c-deep-2);
}

.page-about .about-team .about-index {
  color: var(--c-orange);
}

.page-about .about-team__grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-team__content p {
  margin: 0 0 1.1rem;
  color: #2c3a54;
}

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

.page-about .about-team__roles {
  display: grid;
  gap: 0.9rem;
  margin: 1.75rem 0 0;
}

.page-about .about-team__role {
  background: var(--c-white);
  border: 1px solid rgba(10, 31, 68, 0.1);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem;
  box-shadow: 0 8px 24px rgba(10, 31, 68, 0.08);
}

.page-about .about-team__role-num {
  display: inline-block;
  font-family: var(--f-num);
  font-size: 1.35rem;
  margin-bottom: 0.6rem;
  color: var(--c-orange);
}

.page-about .about-team__role p {
  margin: 0;
  color: #3b4a63;
  font-size: 0.92rem;
}

.page-about .about-team__figure {
  margin: 2rem 0 0;
}

.page-about .about-team__figure img {
  border-radius: var(--radius);
  border: 1px solid rgba(10, 31, 68, 0.12);
  box-shadow: 0 12px 32px rgba(10, 31, 68, 0.14);
}

/* 合作与生态 */
.page-about .about-ecosystem {
  background: linear-gradient(135deg, var(--c-night) 0%, var(--c-deep-2) 55%, var(--c-deep) 100%);
}

.page-about .about-ecosystem__head {
  display: grid;
  gap: 0.5rem;
}

.page-about .about-ecosystem__intro p {
  max-width: 46em;
  margin: 0;
  color: var(--c-silver);
}

.page-about .about-ecosystem__list {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
}

.page-about .about-ecosystem__item {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(176, 184, 196, 0.24);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem;
}

.page-about .about-ecosystem__item h3 {
  color: var(--c-gold);
  margin-bottom: 0.5rem;
}

.page-about .about-ecosystem__item p {
  margin: 0;
  color: var(--c-silver);
  font-size: 0.92rem;
}

.page-about .about-ecosystem__icon {
  display: inline-block;
  width: 1.4rem;
  height: 1.4rem;
  border: 1px solid var(--c-cyan);
  color: var(--c-cyan);
  border-radius: var(--radius);
  font-size: 0.7rem;
  line-height: 1.4rem;
  text-align: center;
  margin-bottom: 0.9rem;
}

.page-about .about-ecosystem__notice {
  margin: 2rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(176, 184, 196, 0.18);
  color: var(--c-silver);
  font-size: 0.82rem;
  max-width: 62em;
}

/* CTA */
.page-about .about-cta {
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 215, 0, 0.1), transparent 48%),
    var(--c-deep);
  text-align: center;
}

.page-about .about-cta__inner {
  padding-block: 5rem;
}

.page-about .about-cta h2 {
  color: var(--c-gold);
  font-size: clamp(2rem, 4vw, 3rem);
}

.page-about .about-cta p {
  max-width: 40em;
  margin-inline: auto;
  color: var(--c-silver);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
  margin-top: 2.2rem;
}

/* 桌面增强 */
@media (min-width: 960px) {
  .page-about .about-container {
    padding-block: 5.5rem 6rem;
  }

  .page-about .about-hero__container {
    padding-block: 4.5rem 5rem;
  }

  .page-about .about-rail {
    margin-bottom: 0;
  }

  .page-about .about-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 4rem;
    align-items: start;
  }

  .page-about .about-hero__aside,
  .page-about .about-hero__main {
    order: 0;
  }

  .page-about .about-hero__figure {
    margin-top: 2.5rem;
  }

  .page-about .about-origin__grid,
  .page-about .about-timeline__header,
  .page-about .about-data__head,
  .page-about .about-team__grid,
  .page-about .about-ecosystem__head {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-about .about-timeline__track {
    margin-top: 3.5rem;
  }

  .page-about .timeline-item {
    padding-left: 6rem;
    padding-bottom: 2.5rem;
  }

  .page-about .about-data__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-data__stat {
    padding: 1.6rem 1.4rem;
  }

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

  .page-about .about-ecosystem__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
    margin-top: 3rem;
  }

  .page-about .about-cta__inner {
    padding-block: 6rem;
  }
}