/* ===== 品牌与团队页 /page-about ===== */
.page-about {
  --about-rail-w: 12.5rem;
  --about-gap: clamp(2.75rem, 7vw, 5rem);
}

.page-about .about-shell {
  padding-block: clamp(1.25rem, 3.5vw, 2.5rem) clamp(3rem, 7vw, 5.5rem);
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .breadcrumb {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-head {
  max-width: 56rem;
  padding-bottom: clamp(1.75rem, 4.5vw, 3rem);
  border-bottom: var(--hair);
}

.page-about .page-title {
  margin: .7rem 0 1.15rem;
  max-width: 19ch;
  letter-spacing: -.02em;
}

.page-about .page-lede {
  max-width: 48ch;
  margin: 0;
  font-size: clamp(1rem, 2.1vw, 1.125rem);
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 左侧索引 + 正文双栏 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.5rem);
  padding-top: clamp(1.75rem, 5vw, 3rem);
}

.page-about .rail__label {
  display: block;
  margin-bottom: .6rem;
  color: var(--slate);
}

.page-about .railnav {
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  padding-bottom: .5rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .railnav__item {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  flex: 0 0 auto;
  padding: .4rem .7rem;
  border: 1px solid var(--jiang-light);
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  font-size: .875rem;
  line-height: 1.4;
  white-space: nowrap;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-about .railnav__idx {
  font-size: .75rem;
  color: var(--slate);
  transition: color .18s var(--ease);
}

.page-about .railnav__item:hover,
.page-about .railnav__item:focus-visible {
  border-color: var(--jiang);
  color: var(--jiang);
}

.page-about .railnav__item:hover .railnav__idx,
.page-about .railnav__item:focus-visible .railnav__idx {
  color: var(--orange);
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: clamp(4.5rem, 9vw, 6rem);
  }

  .page-about .railnav {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0 0 0 1px;
    border-left: 1px solid var(--jiang-light);
  }

  .page-about .railnav__item {
    position: relative;
    width: 100%;
    padding: .55rem .6rem .55rem 1.15rem;
    border: 0;
    background: transparent;
    white-space: normal;
  }

  .page-about .railnav__item::before {
    content: "";
    position: absolute;
    left: -3.5px;
    top: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--slate);
    transform: translateY(-50%);
    transition: width .18s var(--ease), height .18s var(--ease), background-color .18s var(--ease), border-radius .18s var(--ease);
  }

  .page-about .railnav__item:hover::before,
  .page-about .railnav__item:focus-visible::before {
    background: var(--orange);
  }

  /* 当前章节：滚动高亮 */
  .page-about .about-layout:has(#origin.is-current) .railnav__item[href="#origin"],
  .page-about .about-layout:has(#team.is-current) .railnav__item[href="#team"],
  .page-about .about-layout:has(#roadmap.is-current) .railnav__item[href="#roadmap"],
  .page-about .about-layout:has(#coverage.is-current) .railnav__item[href="#coverage"],
  .page-about .about-layout:has(#partners.is-current) .railnav__item[href="#partners"],
  .page-about .about-layout:has(#support.is-current) .railnav__item[href="#support"] {
    color: var(--jiang);
    font-weight: 600;
  }

  .page-about .about-layout:has(#origin.is-current) .railnav__item[href="#origin"]::before,
  .page-about .about-layout:has(#team.is-current) .railnav__item[href="#team"]::before,
  .page-about .about-layout:has(#roadmap.is-current) .railnav__item[href="#roadmap"]::before,
  .page-about .about-layout:has(#coverage.is-current) .railnav__item[href="#coverage"]::before,
  .page-about .about-layout:has(#partners.is-current) .railnav__item[href="#partners"]::before,
  .page-about .about-layout:has(#support.is-current) .railnav__item[href="#support"]::before {
    width: 3px;
    height: 20px;
    border-radius: 0;
    background: var(--orange);
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-body {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-sec {
  scroll-margin-top: clamp(5.5rem, 11vw, 7.5rem);
}

.page-about .sec-head {
  display: grid;
  gap: .4rem;
  margin-bottom: 1.2rem;
}

.page-about .sec-title {
  font-size: clamp(1.35rem, 3.2vw, 1.9rem);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: -.018em;
  margin: 0;
}

.page-about .prose {
  max-width: 62ch;
}

.page-about .prose p {
  margin: 0 0 1.3em;
}

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

.page-about .prose a {
  color: var(--jiang);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .prose a:hover {
  color: var(--orange);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 0 0 1.9rem;
}

.page-about .about-figure--band {
  margin: 0;
}

.page-about .about-figure .media {
  border: 2px solid var(--ink);
  box-shadow: var(--hard-shadow-sm);
  background: var(--paper);
  overflow: hidden;
}

.page-about .about-figure .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-figure .media__caption {
  display: block;
  margin-top: .7rem;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 团队分工条形比例图 ---------- */
.page-about .barlist {
  list-style: none;
  margin: 1.9rem 0 1.9rem;
  padding: 0;
  display: grid;
  gap: 1.65rem;
}

.page-about .barlist__row {
  display: grid;
  gap: .5rem;
}

.page-about .barlist__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-about .barlist__name {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -.01em;
}

.page-about .barlist__num {
  font-size: .875rem;
  color: var(--jiang);
  letter-spacing: .02em;
}

.page-about .barlist__desc {
  margin: 0;
  max-width: 58ch;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .barlist__track {
  position: relative;
  height: 10px;
  background: var(--jiang-light);
  overflow: hidden;
}

.page-about .barlist__fill {
  display: block;
  height: 100%;
  background: var(--jiang);
  transform-origin: left center;
  animation: about-bar-grow .8s var(--ease) both;
}

.page-about .barlist__row:nth-child(1) .barlist__fill { width: 38.4%; animation-delay: .05s; }
.page-about .barlist__row:nth-child(2) .barlist__fill { width: 31.7%; animation-delay: .15s; }
.page-about .barlist__row:nth-child(3) .barlist__fill { width: 18.3%; animation-delay: .25s; }
.page-about .barlist__row:nth-child(4) .barlist__fill { width: 11.6%; animation-delay: .35s; }

@keyframes about-bar-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* ---------- 运营历程 ---------- */
.page-about .sec-body--split {
  display: grid;
  gap: 2rem;
}

.page-about .roadmap {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .roadmap::before {
  content: "";
  position: absolute;
  left: 3.5px;
  top: .7rem;
  bottom: 1.4rem;
  width: 1px;
  background: var(--jiang-light);
}

.page-about .roadmap__item {
  position: relative;
  padding-left: 1.9rem;
  padding-bottom: 1.9rem;
}

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

.page-about .roadmap__dot {
  position: absolute;
  left: 0;
  top: .55rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--slate);
  transition: width .18s var(--ease), height .18s var(--ease), background-color .18s var(--ease);
}

.page-about .roadmap__item:hover .roadmap__dot {
  width: 12px;
  height: 12px;
  top: .4rem;
  background: var(--orange);
}

.page-about .roadmap__dot::after {
  content: attr(data-phase);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translate(-50%, 4px);
  padding: .25rem .5rem;
  background: var(--ink);
  color: var(--paper);
  font-size: .75rem;
  letter-spacing: .08em;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s var(--ease), transform .18s var(--ease);
}

.page-about .roadmap__item:hover .roadmap__dot::after {
  opacity: 1;
  transform: translate(-50%, 0);
}

.page-about .roadmap__phase {
  margin: 0 0 .3rem;
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-about .roadmap__title {
  margin: 0 0 .5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -.01em;
}

.page-about .roadmap__body p:not(.roadmap__phase) {
  margin: 0;
  max-width: 54ch;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

@media (min-width: 1120px) {
  .page-about .sec-body--split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: clamp(2rem, 4vw, 3.25rem);
    align-items: start;
  }

  .page-about .about-figure--road {
    margin-bottom: 0;
  }
}

@media (max-width: 1119px) {
  .page-about .about-figure--road {
    order: -1;
  }
}

/* ---------- 服务覆盖点阵 ---------- */
.page-about .covermap {
  margin: 1.9rem 0;
  border: 2px solid var(--ink);
  box-shadow: var(--hard-shadow-sm);
  background: var(--cream);
  overflow: hidden;
  line-height: 0;
}

.page-about .covermap svg {
  display: block;
  width: 100%;
  height: clamp(190px, 32vw, 280px);
}

/* ---------- 合作生态与荣誉 ---------- */
.page-about .honors {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin-top: 1.9rem;
}

@media (min-width: 680px) {
  .page-about .honors {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .honor {
  display: grid;
  gap: .4rem;
  align-content: start;
  padding: 1.2rem 1.1rem 1.3rem;
  border: 2px solid var(--slate);
  background: var(--paper);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .honor:hover {
  border-color: var(--jiang);
  box-shadow: var(--hard-shadow-sm);
}

.page-about .honor__name {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.45;
}

.page-about .honor__meta {
  margin: 0;
  font-size: 1.35rem;
  color: var(--jiang);
  letter-spacing: .01em;
}

.page-about .honor__source {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 页尾去向 ---------- */
.page-about .about-next {
  margin-top: 2.2rem;
  padding-top: 1.6rem;
  border-top: var(--hair);
}

.page-about .about-next__lead {
  margin: 0 0 .9rem;
  color: var(--slate);
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .8rem;
}

@media (min-width: 760px) {
  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }
}

.page-about .about-next__list li {
  display: grid;
  gap: .28rem;
  padding: .9rem 1rem;
  border: 1px solid var(--jiang-light);
  background: var(--paper);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .about-next__list li:hover {
  border-color: var(--jiang);
  box-shadow: var(--hard-shadow-sm);
}

.page-about .about-next__list a {
  color: var(--ink);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  letter-spacing: -.01em;
}

.page-about .about-next__list a:hover {
  color: var(--jiang);
}

.page-about .about-next__list span {
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .barlist__fill {
    animation: none;
    transform: none;
  }

  .page-about .railnav__item,
  .page-about .honor,
  .page-about .roadmap__dot,
  .page-about .roadmap__dot::after,
  .page-about .about-next__list li {
    transition: none;
  }
}
</style>