/* ===== 品牌概况页 | page-about ===== */
.page-about {
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 20px 0;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--gray);
}
.page-about .breadcrumbs a {
  color: var(--gray);
  text-decoration: none;
  transition: color var(--ease);
}
.page-about .breadcrumbs a:hover {
  color: var(--gold);
}
.page-about .breadcrumbs__sep {
  color: var(--gold);
}

/* ---------- 章节编号装饰 ---------- */
.page-about .about-section-index {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1;
  color: rgba(11, 29, 58, 0.12);
  letter-spacing: -0.04em;
  margin-bottom: 8px;
}
.page-about .about-section-index--light {
  color: rgba(255, 255, 255, 0.14);
}

/* ---------- 01 品牌故事 ---------- */
.page-about .about-mission {
  padding: 40px 20px 48px;
}
.page-about .about-mission__inner {
  display: grid;
  gap: 32px;
  max-width: var(--container-max);
  margin: 0 auto;
}
.page-about .about-mission__text .kicker {
  margin-bottom: 10px;
}
.page-about .about-mission h1 {
  font-family: var(--font-sans);
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--ink);
  margin-bottom: 16px;
}
.page-about .about-mission__lead {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink-deep);
  margin-bottom: 14px;
}
.page-about .about-mission__text p:not(.about-mission__lead) {
  margin-bottom: 14px;
}
.page-about .about-mission__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-about .about-mission__visual {
  margin: 0;
}
.page-about .about-mission__visual img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 14px;
  border: 2px solid var(--gold);
  box-shadow: 0 12px 32px rgba(11, 29, 58, 0.12);
}
.page-about .about-mission__visual figcaption {
  margin-top: 10px;
  color: var(--gray);
}

/* ---------- 02 版本演进时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: 56px 20px 64px;
  background: var(--ink);
  color: var(--white);
}
.page-about .about-timeline__header {
  max-width: 720px;
  margin-bottom: 56px;
}
.page-about .about-timeline__header h2 {
  font-family: var(--font-sans);
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--white);
  margin: 8px 0 12px;
}
.page-about .about-timeline__header p:last-child {
  font-family: var(--font-serif);
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
  font-size: 0.95rem;
}

.page-about .about-timeline__track {
  position: absolute;
  top: 200px;
  bottom: 40px;
  left: 32px;
  width: 4px;
  background: repeating-linear-gradient(
    180deg,
    var(--gold) 0 12px,
    rgba(201, 169, 97, 0.28) 12px 20px
  );
  transform: rotate(0.6deg);
  transform-origin: center top;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline__item {
  position: relative;
  padding-left: 76px;
  margin-bottom: 36px;
}

.page-about .about-timeline__node {
  position: absolute;
  left: 6px;
  top: 6px;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  border-radius: 50%;
  clip-path: polygon(18% 0, 82% 0, 100% 18%, 100% 82%, 82% 100%, 18% 100%, 0 82%, 0 18%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 4px rgba(201, 169, 97, 0.2), 0 6px 16px rgba(0, 0, 0, 0.3);
}
.page-about .about-timeline__version {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.82rem;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-timeline__card {
  background: var(--ink-deep);
  border: 1px solid rgba(201, 169, 97, 0.3);
  border-radius: 14px;
  padding: 20px;
  transition: border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}
.page-about .about-timeline__card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}
.page-about .about-timeline__card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.page-about .about-timeline__card-head .about-timeline__stage {
  margin-left: auto;
}
.page-about .about-timeline__icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid rgba(201, 169, 97, 0.4);
}
.page-about .about-timeline__stage {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--gold-light);
  border: 1px solid var(--gold);
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}
.page-about .about-timeline__card h3 {
  font-family: var(--font-sans);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}
.page-about .about-timeline__card p {
  font-family: var(--font-serif);
  font-size: 0.89rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.76);
  margin: 0;
}

.page-about .about-timeline__footer {
  margin-top: 8px;
  text-align: center;
}

/* ---------- 03 数据与内容生态 ---------- */
.page-about .about-data {
  padding: 56px 20px;
  background: var(--paper);
}
.page-about .about-data__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  gap: 40px;
}
.page-about .about-data__header h2 {
  font-family: var(--font-sans);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--ink);
  margin: 8px 0 12px;
}
.page-about .about-data__header p:last-child {
  font-family: var(--font-serif);
  color: var(--gray);
  line-height: 1.7;
  font-size: 0.95rem;
  max-width: 600px;
}

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.page-about .about-data__stat {
  background: var(--white);
  border-radius: 14px;
  padding: 20px 10px;
  text-align: center;
  border-top: 4px solid var(--gold);
  box-shadow: 0 4px 16px rgba(11, 29, 58, 0.06);
  transition: transform var(--ease), box-shadow var(--ease);
}
.page-about .about-data__stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(11, 29, 58, 0.1);
}
.page-about .about-data__stat-num {
  display: block;
  font-family: var(--font-sans);
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--ink);
}
.page-about .about-data__stat-label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--gray);
  margin-top: 8px;
  line-height: 1.4;
}

.page-about .about-data__main {
  display: grid;
  gap: 32px;
}
.page-about .about-data__chart {
  margin: 0;
  text-align: center;
}
.page-about .about-data__chart img {
  width: 220px;
  max-width: 100%;
  height: auto;
  border-radius: 50%;
  box-shadow: 0 0 0 8px var(--gray-light), 0 12px 32px rgba(11, 29, 58, 0.12);
}
.page-about .about-data__chart figcaption {
  margin-top: 12px;
  color: var(--gray);
}

.page-about .about-data__categories {
  display: grid;
  gap: 16px;
}
.page-about .about-data__category {
  position: relative;
  background: var(--white);
  border-radius: 12px 24px 12px 24px;
  padding: 24px 24px 24px 28px;
  border-left: 4px solid var(--gold);
  box-shadow: 0 4px 16px rgba(11, 29, 58, 0.06);
  transition: transform var(--ease), box-shadow var(--ease);
}
.page-about .about-data__category:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(11, 29, 58, 0.1);
}
.page-about .about-data__cat-num {
  position: absolute;
  right: 18px;
  top: 12px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 2rem;
  line-height: 1;
  color: rgba(11, 29, 58, 0.1);
}
.page-about .about-data__category h3 {
  font-family: var(--font-sans);
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 8px;
}
.page-about .about-data__category p {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--gray);
  margin: 0;
  padding-right: 32px;
}

/* ---------- 04 合规声明 ---------- */
.page-about .about-compliance {
  padding: 56px 20px;
  background: var(--ink);
}
.page-about .about-compliance__inner {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  background: var(--ink-deep);
  border: 1px solid rgba(230, 57, 70, 0.4);
  border-radius: 16px;
  padding: 32px 28px;
  overflow: hidden;
}
.page-about .about-compliance__line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--red), rgba(230, 57, 70, 0.2));
}
.page-about .about-compliance__content .kicker {
  color: var(--gold-light);
  margin-top: 10px;
}
.page-about .about-compliance__content h2 {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  margin: 8px 0 14px;
}
.page-about .about-compliance__content p:not(.kicker) {
  font-family: var(--font-serif);
  font-size: 0.94rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.74);
  margin-bottom: 20px;
}
.page-about .about-compliance__content .btn--ghost {
  border-color: var(--gold);
  color: var(--gold);
}
.page-about .about-compliance__content .btn--ghost:hover {
  background: var(--gold);
  color: var(--ink);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-about .breadcrumbs {
    padding: 24px 40px 0;
    max-width: var(--container-max);
    margin: 0 auto;
  }

  .page-about .about-mission {
    padding: 64px 40px 56px;
  }
  .page-about .about-mission__inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 56px;
  }
  .page-about .about-mission h1 {
    font-size: 2.6rem;
  }
  .page-about .about-mission__visual img {
    border-radius: 16px;
  }

  .page-about .about-timeline {
    padding: 80px 40px 72px;
  }
  .page-about .about-timeline__header {
    max-width: 860px;
  }
  .page-about .about-timeline__header h2 {
    font-size: 2rem;
  }

  .page-about .about-data {
    padding: 72px 40px;
  }
  .page-about .about-data__header h2 {
    font-size: 2rem;
  }
  .page-about .about-data__stats {
    gap: 20px;
  }
  .page-about .about-data__stat-num {
    font-size: 2.6rem;
  }
  .page-about .about-data__main {
    grid-template-columns: 320px 1fr;
    align-items: center;
    gap: 48px;
  }
  .page-about .about-data__chart img {
    width: 280px;
  }

  .page-about .about-compliance {
    padding: 72px 40px;
  }
  .page-about .about-compliance__inner {
    padding: 44px 48px;
  }
}

/* ---------- 桌面端：时间线斜轨与节点交替 ---------- */
@media (min-width: 1024px) {
  .page-about .about-timeline__track {
    left: 50%;
    top: 220px;
    bottom: 40px;
    width: 5px;
    transform: translateX(-50%) rotate(1.2deg);
  }

  .page-about .about-timeline__list {
    max-width: var(--container-max);
    margin: 0 auto;
  }

  .page-about .about-timeline__item {
    width: calc(50% - 40px);
    padding: 0;
    margin-bottom: 60px;
  }

  /* 左列：卡片靠右，节点落在中央轨道 */
  .page-about .about-timeline__item:nth-child(odd) {
    margin-left: 0;
    margin-right: auto;
    padding-right: 72px;
    text-align: left;
  }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__node {
    left: auto;
    right: -68px;
  }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card-head {
    flex-direction: row-reverse;
  }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card-head .about-timeline__stage {
    margin-left: 0;
    margin-right: auto;
  }

  /* 右列：卡片靠左，节点落在中央轨道 */
  .page-about .about-timeline__item:nth-child(even) {
    margin-left: calc(50% + 40px);
    margin-right: 0;
    padding-left: 72px;
    text-align: left;
  }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__node {
    left: -68px;
    right: auto;
  }

  .page-about .about-timeline__card {
    text-align: left;
  }

  .page-about .about-timeline__footer {
    margin-top: 16px;
  }
}