/* ===================== 品牌档案页 ===================== */

.page-about {
  position: relative;
  background-color: var(--c-space);
  background-image:
    linear-gradient(rgba(245, 184, 30, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 184, 30, 0.045) 1px, transparent 1px),
    linear-gradient(180deg, rgba(155, 77, 255, 0.07), transparent 460px);
  background-size: 56px 56px, 56px 56px, 100% 460px;
  color: var(--c-white);
  overflow: hidden;
}

.page-about .section-subtitle {
  max-width: 640px;
  margin-top: 10px;
  color: var(--c-silver);
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- 品牌简介 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 72px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-silver);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 420px;
  height: 320px;
  background: radial-gradient(closest-side, rgba(155, 77, 255, 0.2), transparent);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero__copy {
  position: relative;
}

.page-about .about-hero__title {
  margin: 14px 0 20px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.16;
  color: var(--c-white);
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 560px;
  color: var(--c-silver);
  font-size: 16px;
  line-height: 1.9;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px 24px;
  margin-top: 36px;
}

.page-about .about-hero__stat {
  border-left: 2px solid var(--c-gold);
  padding: 4px 0 4px 16px;
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 900;
  line-height: 1.2;
  color: var(--c-gold);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-silver);
}

.page-about .about-hero__media {
  position: relative;
  isolation: isolate;
}

.page-about .about-hero__media::before {
  content: "";
  position: absolute;
  top: -14px;
  right: -14px;
  width: 140px;
  height: 140px;
  border-top: 1px solid var(--line-gold);
  border-right: 1px solid var(--line-gold);
  z-index: 2;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  bottom: -14px;
  left: -14px;
  width: 140px;
  height: 140px;
  border-bottom: 1px solid var(--line-gold);
  border-left: 1px solid var(--line-gold);
  z-index: 2;
}

.page-about .about-hero__media img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line-silver);
  background: var(--c-night);
}

/* ---------- 发展历程 ---------- */
.page-about .about-journey {
  padding: 68px 0 76px;
}

.page-about .about-journey__head {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  align-items: flex-start;
  justify-content: space-between;
}

.page-about .about-journey__media {
  margin: 30px 0 52px;
}

.page-about .about-journey__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line-gold);
  filter: saturate(0.8) contrast(1.08);
}

/* 时间线 */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 16px 0 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
  background: linear-gradient(to bottom, transparent 2%, var(--c-gold) 8%, var(--c-gold) 90%, transparent 100%);
  box-shadow: 0 0 14px rgba(245, 184, 30, 0.18);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 52px 44px;
}

.page-about .timeline__item:last-child {
  padding-bottom: 8px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-space);
  border: 2px solid var(--c-gold);
  box-shadow: 0 0 0 4px rgba(245, 184, 30, 0.16), 0 0 16px rgba(245, 184, 30, 0.45);
  z-index: 1;
}

.page-about .timeline__badge {
  display: inline-block;
  margin-bottom: 14px;
  padding-bottom: 6px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--c-gold);
  border-bottom: 1px solid var(--line-gold);
}

.page-about .timeline__card {
  position: relative;
  padding: 26px 28px;
  background: linear-gradient(135deg, var(--c-night), var(--c-nebula));
  border: 1px solid var(--line-silver);
  transition: transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.page-about .timeline__card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46px;
  height: 2px;
  background: var(--c-gold);
  opacity: 0;
  transition: opacity var(--speed) var(--ease);
}

.page-about .timeline__card:hover {
  transform: translateY(-4px);
  border-color: var(--line-gold);
  box-shadow: var(--shadow-card), 0 0 22px rgba(245, 184, 30, 0.08);
}

.page-about .timeline__card:hover::after {
  opacity: 1;
}

.page-about .timeline__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .timeline__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-silver);
}

/* ---------- 资质认证 ---------- */
.page-about .about-cert {
  padding: 72px 0;
  border-top: 1px solid var(--line-silver);
  border-bottom: 1px solid var(--line-silver);
}

.page-about .about-cert__grid {
  display: grid;
  gap: 48px;
}

.page-about .about-cert__side {
  position: relative;
}

.page-about .about-cert__side p:not(.kicker) {
  margin: 0 0 28px;
  color: var(--c-silver);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-cert__side::after {
  content: "";
  display: block;
  width: 88px;
  height: 3px;
  margin-top: 30px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-purple));
}

.page-about .about-cert__list {
  display: grid;
  gap: 4px;
}

.page-about .about-cert__item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-silver);
}

.page-about .about-cert__item:last-child {
  border-bottom: 0;
}

.page-about .about-cert__num {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--c-gold);
  border: 1px solid var(--line-gold);
  background: rgba(245, 184, 30, 0.04);
}

.page-about .about-cert__item h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .about-cert__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-silver);
}

/* ---------- 团队规模 ---------- */
.page-about .about-team {
  padding: 72px 0;
  overflow: hidden;
}

.page-about .about-team__grid {
  display: grid;
  gap: 44px;
  align-items: center;
}

.page-about .about-team__copy p:not(.kicker) {
  margin: 0;
  color: var(--c-silver);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 32px;
}

.page-about .about-team__stat {
  padding: 18px 8px;
  text-align: center;
  background: var(--c-night);
  border: 1px solid var(--line-silver);
}

.page-about .about-team__stat strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 900;
  line-height: 1.2;
  color: var(--c-gold);
}

.page-about .about-team__stat span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--c-silver);
}

.page-about .about-team__media {
  position: relative;
  isolation: isolate;
}

.page-about .about-team__media::after {
  content: "";
  position: absolute;
  right: -12px;
  bottom: -12px;
  width: 160px;
  height: 160px;
  border-right: 1px solid var(--line-gold);
  border-bottom: 1px solid var(--line-gold);
  z-index: -1;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line-silver);
  filter: saturate(0.72) contrast(1.06) sepia(0.18);
  background: var(--c-night);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  padding: 72px 0 84px;
  border-top: 1px solid var(--line-silver);
  background: linear-gradient(180deg, transparent, rgba(18, 26, 46, 0.55), transparent);
}

.page-about .about-eco__grid {
  display: grid;
  gap: 16px;
  margin-top: 42px;
}

.page-about .about-eco__item {
  position: relative;
  padding: 30px 28px 32px;
  background: var(--c-night);
  border: 1px solid var(--line-silver);
  overflow: hidden;
  transition: transform var(--speed) var(--ease), border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.page-about .about-eco__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold), rgba(245, 184, 30, 0));
  opacity: 0.65;
}

.page-about .about-eco__item:hover {
  transform: translateY(-4px);
  border-color: var(--line-gold);
  box-shadow: var(--shadow-card);
}

.page-about .about-eco__num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-purple);
}

.page-about .about-eco__item h3 {
  margin: 14px 0 10px;
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .about-eco__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-silver);
}

.page-about .about-eco__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 24px;
  align-items: center;
  justify-content: space-between;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line-silver);
}

.page-about .about-eco__foot p {
  margin: 0;
  color: var(--c-silver);
  font-size: 14px;
  line-height: 1.8;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .page-about .about-team__stats {
    gap: 16px;
  }

  .page-about .about-team__stat {
    padding: 22px 12px;
  }
}

@media (min-width: 860px) {
  /* 时间线桌面左右交替 */
  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .timeline__item {
    width: 50%;
    padding: 0 64px 56px 0;
    text-align: right;
  }

  .page-about .timeline__item::before {
    left: auto;
    right: -8px;
  }

  .page-about .timeline__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 56px 64px;
    text-align: left;
  }

  .page-about .timeline__item:nth-child(even)::before {
    left: -8px;
    right: auto;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
  }

  .page-about .about-journey__head {
    align-items: flex-end;
  }

  .page-about .about-cert__grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 72px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
  }

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