/* =============================================
   品牌档案页 page-about · 页面专属样式
   ============================================= */
.page-about {
  --about-round-size: clamp(7rem, 22vw, 11rem);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about__breadcrumbs {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 1rem 1rem 0;
}

/* ---------- 首屏：品牌印象 ---------- */
.page-about .about-hero {
  position: relative;
  background: linear-gradient(126deg, var(--c-ink) 0%, var(--c-navy) 58%, rgba(11, 42, 91, 0.62) 100%);
  color: var(--c-paper);
  padding: 3rem 0 4.5rem;
  overflow: hidden;
}

.page-about .about-hero__deco {
  position: absolute;
  inset: 0;
  opacity: 0.24;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 100%;
  background: linear-gradient(225deg, rgba(53, 224, 161, 0.07), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2.5rem;
}

.page-about .about-hero__kicker {
  color: var(--c-green);
}

.page-about .about-hero__tag {
  display: inline-flex;
  margin: 1.1rem 0 0.9rem;
}

.page-about .about-hero__tag,
.page-about .about-timeline__card .tag-chip {
  color: rgba(245, 247, 250, 0.9);
  border-color: currentColor;
}

.page-about .about-hero__title {
  margin: 0.2rem 0 1rem;
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--c-paper);
}

.page-about .about-hero__lead {
  margin: 0 0 1.8rem;
  max-width: 40rem;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(245, 247, 250, 0.82);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.page-about .about-hero__stat {
  background: rgba(245, 247, 250, 0.06);
  border: 1px solid rgba(245, 247, 250, 0.14);
  padding: 1rem 1.2rem;
  min-width: 7.4rem;
}

.page-about .about-hero__stat-num {
  display: block;
  font-size: 1.6rem;
  line-height: 1.1;
  font-weight: 800;
  color: var(--c-green);
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.82rem;
  color: rgba(245, 247, 250, 0.68);
}

.page-about .about-hero__media {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

.page-about .about-hero__figure {
  margin: 0;
  background: rgba(245, 247, 250, 0.05);
  padding: 0.6rem;
}

.page-about .about-hero__img,
.page-about .about-timeline__image-wrap img,
.page-about .about-trust__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero__figcaption,
.page-about .about-trust__figcaption {
  padding: 0.85rem 0.2rem 0.2rem;
  font-size: 0.82rem;
  color: rgba(245, 247, 250, 0.72);
}

.page-about .about-hero__round {
  position: relative;
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  flex-wrap: wrap;
  background: rgba(11, 42, 91, 0.62);
  border: 1px solid rgba(53, 224, 161, 0.35);
  clip-path: polygon(0 0, calc(100% - 1.2rem) 0, 100% 1.2rem, 100% 100%, 1.2rem 100%, 0 calc(100% - 1.2rem));
  padding: 1.6rem 1.8rem;
}

.page-about .about-hero__round-label {
  font-size: 0.98rem;
  line-height: 1.5;
  font-weight: 600;
  color: var(--c-paper);
}

.page-about .about-hero__round-num {
  font-size: var(--about-round-size);
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: -0.03em;
  color: var(--c-green);
}

.page-about .about-hero__round-unit {
  font-size: 1rem;
  color: rgba(245, 247, 250, 0.7);
  padding-bottom: 0.3rem;
}

/* ---------- 时间线：每一步更新 ---------- */
.page-about .about-timeline {
  background: var(--c-paper);
  color: var(--c-text);
  padding: 4.5rem 0 4rem;
}

.page-about .about-timeline .section-kicker {
  color: var(--c-navy);
}

.page-about .about-timeline .section-kicker::before {
  background: linear-gradient(135deg, var(--c-navy), var(--c-gold));
}

.page-about .about-timeline .section-title {
  color: var(--c-navy);
  margin-top: 0.2rem;
}

.page-about .about-timeline__intro,
.page-about .about-systems__intro {
  max-width: 42rem;
  margin-top: 1rem;
  line-height: 1.7;
  color: var(--c-hint);
}

.page-about .about-timeline__track {
  position: relative;
  margin-top: 3.2rem;
  padding-left: 2rem;
}

.page-about .about-timeline__line {
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 0.4rem;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(to bottom, var(--c-green), var(--c-navy), var(--c-gold));
  opacity: 0.65;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 2.6rem;
  width: 100%;
}

.page-about .about-timeline__node {
  position: absolute;
  left: -1.65rem;
  top: 1.65rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-paper);
  border: 3px solid var(--c-gold);
  box-shadow: 0 0 0 4px rgba(242, 180, 65, 0.22);
  z-index: 1;
}

.page-about .about-timeline__card {
  background: var(--c-navy);
  color: var(--c-paper);
  padding: 1.6rem 1.4rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-timeline__card:hover {
  transform: translateY(-3px);
}

.page-about .about-timeline__card h3 {
  margin: 0.55rem 0 0.6rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.18rem;
  line-height: 1.35;
  color: var(--c-paper);
}

.page-about .about-timeline__card p {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.82);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-size: 1.45rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--c-gold);
}

.page-about .about-timeline__card--current {
  background: var(--c-rock);
  box-shadow: inset 5px 0 0 var(--c-green);
}

.page-about .about-timeline__image-wrap {
  background: var(--c-ink);
  padding: 0.9rem 0.9rem 0.6rem;
  margin: 0 0 2.6rem;
}

.page-about .about-timeline__image-caption {
  margin: 0;
  padding: 0.8rem 0.1rem 0.2rem;
  font-size: 0.82rem;
  color: rgba(245, 247, 250, 0.72);
}

.page-about .about-timeline__note {
  margin-top: 0.5rem;
  padding-left: 2rem;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--c-hint);
  border-left: 2px solid var(--c-green);
}

/* ---------- 数据与内容体系 ---------- */
.page-about .about-systems {
  background: linear-gradient(180deg, var(--c-paper), var(--c-mist) 45%);
  padding: 4.5rem 0 5rem;
  color: var(--c-text);
}

.page-about .about-systems .section-kicker,
.page-about .about-systems .section-title {
  color: var(--c-navy);
}

.page-about .about-systems__grid {
  display: grid;
  gap: 1.2rem;
  margin-top: 2.4rem;
}

.page-about .about-systems__card {
  background: var(--c-paper);
  border: 1px solid rgba(11, 42, 91, 0.16);
  padding: 1.6rem 1.4rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-systems__card:hover {
  transform: translateY(-3px);
  border-color: var(--c-green);
}

.page-about .about-systems__num {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.page-about .about-systems__card h3 {
  margin: 0.6rem 0 0.5rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--c-navy);
}

.page-about .about-systems__card p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--c-hint);
}

.page-about .about-systems__statbar {
  display: grid;
  gap: 1.2rem;
  margin-top: 2.6rem;
}

.page-about .about-systems__stat {
  background: var(--c-ink);
  color: var(--c-paper);
  padding: 1.6rem 1.4rem;
}

.page-about .about-systems__stat-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--c-green);
}

.page-about .about-systems__stat-label {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.88rem;
  color: rgba(245, 247, 250, 0.72);
}

.page-about .about-systems__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.4rem;
}

/* ---------- 资质与合规 ---------- */
.page-about .about-trust {
  background: linear-gradient(135deg, var(--c-ink) 0%, var(--c-navy) 100%);
  color: var(--c-paper);
  padding: 4.5rem 0 5rem;
}

.page-about .about-trust__inner {
  display: grid;
  gap: 2.8rem;
}

.page-about .about-trust .section-kicker {
  color: var(--c-green);
}

.page-about .about-trust .section-title {
  color: var(--c-paper);
}

.page-about .about-trust__icp {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 1rem;
  background: rgba(245, 247, 250, 0.05);
  border: 1px solid rgba(242, 180, 65, 0.55);
  padding: 1.1rem 1.3rem;
  margin: 0.4rem 0 1.3rem;
}

.page-about .about-trust__icp-label {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-gold);
}

.page-about .about-trust__icp-num {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .about-trust p {
  margin: 0 0 1.1rem;
  max-width: 44rem;
  line-height: 1.75;
  color: rgba(245, 247, 250, 0.78);
}

.page-about .about-trust__points {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .about-trust__points li {
  position: relative;
  padding-left: 1.7rem;
  line-height: 1.55;
  color: var(--c-paper);
}

.page-about .about-trust__points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 1rem;
  height: 2px;
  background: var(--c-green);
  clip-path: polygon(0 0, 100% 0, 78% 100%, 0 100%);
}

.page-about .about-trust__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.8rem;
}

.page-about .about-trust__figure {
  margin: 0;
  background: rgba(245, 247, 250, 0.05);
  border: 1px solid rgba(245, 247, 250, 0.1);
  padding: 0.6rem;
}

/* ---------- 中等尺寸 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    display: grid;
    grid-template-columns: repeat(3, auto);
    gap: 1rem;
    justify-content: start;
  }

  .page-about .about-systems__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-systems__card--wide {
    grid-column: 1 / -1;
  }

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

/* ---------- 桌面时间线 ---------- */
@media (min-width: 768px) {
  .page-about .about-timeline__track {
    padding-left: 0;
  }

  .page-about .about-timeline__line {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline__item {
    width: 50%;
    padding-right: 3.2rem;
  }

  .page-about .about-timeline__item--right {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 3.2rem;
  }

  .page-about .about-timeline__node {
    left: auto;
    right: -0.58rem;
  }

  .page-about .about-timeline__item--right .about-timeline__node {
    left: -0.58rem;
    right: auto;
  }

  .page-about .about-timeline__image-wrap {
    max-width: 46rem;
    margin: 0 auto 3rem;
  }

  .page-about .about-timeline__note {
    padding-left: 0;
    max-width: 42rem;
    border-left: none;
    border-top: 2px solid var(--c-green);
    padding-top: 1rem;
  }
}

/* ---------- 桌面宽屏 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 4rem;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }

  .page-about .about-hero__media {
    position: relative;
    padding-bottom: 2.5rem;
  }

  .page-about .about-hero__round {
    position: absolute;
    bottom: 0;
    right: -1rem;
    min-width: 13.5rem;
  }

  .page-about .about-trust__inner {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }
}