.page-about {
  --about-panel: rgba(255, 255, 255, .05);
  --about-panel-strong: rgba(15, 42, 35, .78);
  overflow-x: hidden;
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding: clamp(40px, 7vw, 78px) 0 clamp(28px, 5vw, 52px);
}

.page-about .intro-grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .intro-lead h1 {
  margin: 14px 0 16px;
  font-size: clamp(2rem, 8.2vw, 4.1rem);
  font-weight: 900;
  line-height: .98;
  letter-spacing: -.03em;
}

.page-about .intro-lead p {
  max-width: 48ch;
  color: var(--cool);
  font-size: 1.0625rem;
  line-height: 1.75;
}

.page-about .intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .glass-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--line-soft);
  backdrop-filter: blur(16px);
}

.page-about .board-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px 20px;
  background: rgba(11, 13, 16, .58);
}

.page-about .board-label {
  color: var(--cool);
  font-size: .75rem;
  letter-spacing: .12em;
}

.page-about .board-item .stat-num {
  color: var(--neon);
  font-size: clamp(1.75rem, 6vw, 2.25rem);
  font-weight: 700;
  line-height: 1;
}

.page-about .board-unit {
  color: var(--paper);
  font-size: .8125rem;
  line-height: 1.4;
  opacity: .82;
}

.page-about .about-index {
  display: flex;
  gap: 8px;
  margin-top: 30px;
  padding-bottom: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index::-webkit-scrollbar {
  display: none;
}

.page-about .about-index .toc-link {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--cool);
  font-size: .8125rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-index .toc-link:hover,
.page-about .about-index .toc-link:focus-visible,
.page-about .about-index .toc-link[aria-current="true"] {
  border-color: var(--neon);
  color: var(--neon);
}

/* ---------- 区块通用标题 ---------- */
.page-about .section-head h2 {
  margin: 12px 0 0;
  font-size: clamp(1.6rem, 5.4vw, 2.6rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
}

.page-about .section-sub {
  max-width: 56ch;
  margin: 14px 0 0;
  color: var(--cool);
  font-size: .9375rem;
  line-height: 1.8;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: clamp(38px, 6vw, 66px) 0 clamp(48px, 7vw, 84px);
  background:
    radial-gradient(120% 60% at 8% 0%, rgba(15, 42, 35, .9), transparent 62%),
    var(--ink);
}

.page-about .year-rail {
  display: flex;
  gap: 8px;
  margin-top: 26px;
  padding-bottom: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .year-rail::-webkit-scrollbar {
  display: none;
}

.page-about .year-rail a {
  flex: 0 0 auto;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--cool);
  font-family: var(--font-num);
  font-size: .75rem;
  letter-spacing: .08em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.page-about .year-rail a:hover,
.page-about .year-rail a:focus-visible {
  border-color: var(--warm);
  color: var(--warm);
  background: rgba(255, 138, 43, .08);
}

.page-about .timeline {
  position: relative;
  display: grid;
  gap: 30px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 7px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon), rgba(255, 61, 24, .55) 58%, transparent);
}

.page-about .tl-node {
  position: relative;
  padding-left: 34px;
}

.page-about .tl-node::after {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 15px;
  height: 15px;
  border: 2px solid var(--neon);
  border-radius: 50%;
  background: var(--ink);
  transition: background .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .tl-node:target::after {
  background: var(--neon);
  box-shadow: 0 0 0 7px rgba(37, 242, 210, .16);
}

.page-about .tl-card {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(155deg, var(--about-panel-strong), rgba(11, 13, 16, .55));
}

.page-about .tl-year {
  display: inline-block;
  color: var(--warm);
  font-family: var(--font-num);
  font-size: .8125rem;
  letter-spacing: .14em;
}

.page-about .tl-card h3 {
  margin: 10px 0 8px;
  font-size: 1.1875rem;
  font-weight: 800;
  line-height: 1.3;
}

.page-about .tl-card p {
  margin: 0;
  color: var(--cool);
  font-size: .9375rem;
  line-height: 1.75;
}

.page-about .tl-card .media-frame {
  margin-top: 16px;
}

/* ---------- 交付链路（纸白长文区） ---------- */
.page-about .about-flow {
  padding: clamp(38px, 6vw, 70px) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .section-head--dark .eyebrow {
  color: rgba(11, 13, 16, .55);
}

.page-about .section-head--dark h2 {
  color: var(--ink);
}

.page-about .flow-sub {
  max-width: 58ch;
  margin: 14px 0 0;
  color: rgba(11, 13, 16, .68);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-about .pipeline {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .pipe-step {
  padding: 20px 18px 22px;
  border: 1px solid rgba(37, 43, 49, .16);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .62);
}

.page-about .pipe-idx {
  color: var(--brand);
  font-family: var(--font-num);
  font-size: .8125rem;
  letter-spacing: .16em;
}

.page-about .pipe-step h3 {
  margin: 10px 0 8px;
  font-size: 1.0625rem;
  font-weight: 800;
}

.page-about .pipe-step p {
  margin: 0;
  color: rgba(11, 13, 16, .68);
  font-size: .9375rem;
  line-height: 1.75;
}

.page-about .flow-notes {
  display: grid;
  gap: 10px;
  margin-top: 26px;
  padding: 20px 18px;
  border-radius: var(--radius-md);
  background: var(--green);
  color: var(--paper);
}

.page-about .note-tag {
  justify-self: start;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  background: rgba(37, 242, 210, .14);
  color: var(--neon);
  font-family: var(--font-num);
  font-size: .75rem;
  letter-spacing: .1em;
}

.page-about .flow-notes p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
}

.page-about .text-link {
  justify-self: start;
  color: var(--warm);
  font-size: .9375rem;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 138, 43, .5);
  padding-bottom: 2px;
}

.page-about .text-link:hover,
.page-about .text-link:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
}

/* ---------- 团队与运营网络 ---------- */
.page-about .about-team {
  padding: clamp(38px, 6vw, 70px) 0;
  background:
    linear-gradient(180deg, var(--ink) 0%, var(--green) 26%, var(--green) 74%, var(--ink) 100%);
}

.page-about .team-grid {
  display: grid;
  gap: 24px;
  margin-top: 28px;
  align-items: start;
}

.page-about .team-copy h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: .01em;
}

.page-about .team-copy > p {
  margin: 0;
  color: var(--cool);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-about .role-list {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role-list li {
  display: flex;
  gap: 10px;
  font-size: .9375rem;
  line-height: 1.7;
}

.page-about .role-list li::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  margin-top: 9px;
  background: var(--warm);
  transform: rotate(45deg);
}

.page-about .team-photo {
  margin: 0;
}

.page-about .city-map {
  position: relative;
  height: 260px;
  margin-top: 30px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background-color: rgba(11, 13, 16, .62);
  background-image: radial-gradient(circle, rgba(243, 240, 234, .14) 1.3px, transparent 1.4px);
  background-size: 24px 24px;
}

.page-about .city-mark {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  transform: translate(-50%, -50%);
  transition: transform .25s var(--ease);
  cursor: default;
}

.page-about .city-mark .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 6px rgba(37, 242, 210, .14);
}

.page-about .city-mark.is-hq .dot {
  width: 14px;
  height: 14px;
  background: var(--brand);
  box-shadow: 0 0 0 9px rgba(255, 61, 24, .18);
}

.page-about .city-mark .name {
  color: var(--paper);
  font-family: var(--font-num);
  font-size: .75rem;
  letter-spacing: .1em;
  white-space: nowrap;
}

.page-about .city-mark .role {
  color: var(--cool);
  font-size: .6875rem;
  white-space: nowrap;
}

.page-about .city-mark:hover,
.page-about .city-mark:focus-within {
  transform: translate(-50%, -50%) scale(1.14);
}

.page-about .city-mark:hover .name,
.page-about .city-mark:focus-within .name {
  color: var(--neon);
}

.page-about .city-mark--taiyuan { left: 38%; top: 30%; }
.page-about .city-mark--chengdu { left: 26%; top: 68%; }
.page-about .city-mark--suzhou { left: 70%; top: 60%; }
.page-about .city-mark--qingdao { left: 78%; top: 22%; }

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding: clamp(38px, 6vw, 70px) 0;
}

.page-about .partners-grid {
  display: grid;
  gap: 24px;
  margin-top: 28px;
  align-items: start;
}

.page-about .partner-types {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-types li {
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-panel);
}

.page-about .partner-types strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1rem;
  font-weight: 800;
}

.page-about .partner-types span {
  display: block;
  color: var(--cool);
  font-size: .875rem;
  line-height: 1.7;
}

.page-about .partner-photo {
  margin: 0;
}

.page-about .api-panel {
  margin-top: 26px;
  padding: 20px 18px 22px;
  border: 1px solid rgba(37, 242, 210, .32);
  border-radius: var(--radius-md);
  background: linear-gradient(140deg, rgba(37, 242, 210, .09), transparent 72%);
}

.page-about .api-panel h3 {
  margin: 0 0 10px;
  font-size: 1.0625rem;
  font-weight: 800;
}

.page-about .api-panel p {
  margin: 0 0 14px;
  color: var(--cool);
  font-size: .9375rem;
  line-height: 1.78;
}

.page-about .api-panel .text-link {
  display: inline-block;
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-creds {
  padding: clamp(38px, 6vw, 70px) 0;
  background: linear-gradient(180deg, var(--ink-soft), var(--ink));
}

.page-about .cred-grid {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .cred-grid li {
  padding: 22px 18px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .04);
  backdrop-filter: blur(12px);
}

.page-about .cred-year {
  display: block;
  color: var(--neon);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: .04em;
}

.page-about .cred-grid h3 {
  margin: 12px 0 8px;
  font-size: 1.0625rem;
  font-weight: 800;
  line-height: 1.34;
}

.page-about .cred-grid p {
  margin: 0;
  color: var(--cool);
  font-size: .875rem;
  line-height: 1.75;
}

/* ---------- 品牌认证与备案 ---------- */
.page-about .about-verify {
  padding: 0 0 clamp(44px, 7vw, 76px);
  background: var(--ink);
}

.page-about .verify-strip {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 4vw, 34px) clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-top: 2px solid var(--brand);
  border-radius: var(--radius-lg);
  background: rgba(15, 42, 35, .5);
}

.page-about .verify-copy h2 {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 4.4vw, 1.9rem);
  font-weight: 900;
  line-height: 1.15;
}

.page-about .verify-copy p {
  margin: 0;
  max-width: 62ch;
  color: var(--cool);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-about .verify-list {
  display: grid;
  gap: 14px;
  margin: 0;
}

.page-about .verify-list div {
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.page-about .verify-list dt {
  color: var(--cool);
  font-size: .75rem;
  letter-spacing: .12em;
}

.page-about .verify-list dd {
  margin: 6px 0 0;
  color: var(--paper);
  font-size: .9375rem;
  line-height: 1.5;
  word-break: break-word;
}

.page-about .verify-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 动效 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}

.page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .pipeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .cred-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .flow-notes {
    grid-template-columns: auto 1fr;
    align-items: start;
    column-gap: 18px;
  }

  .page-about .flow-notes p {
    grid-column: 2;
  }

  .page-about .flow-notes .text-link {
    grid-column: 2;
  }

  .page-about .verify-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .intro-grid {
    grid-template-columns: 1.15fr .85fr;
    gap: 52px;
    align-items: end;
  }

  .page-about .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 76px;
    row-gap: 46px;
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-.5px);
  }

  .page-about .tl-node {
    padding-left: 0;
  }

  .page-about .tl-node:nth-child(odd) {
    padding-right: 46px;
  }

  .page-about .tl-node:nth-child(even) {
    padding-left: 46px;
  }

  .page-about .tl-node::after {
    top: 26px;
  }

  .page-about .tl-node:nth-child(odd)::after {
    left: auto;
    right: -45px;
  }

  .page-about .tl-node:nth-child(even)::after {
    left: -45px;
  }

  .page-about .team-grid {
    grid-template-columns: 1.12fr .88fr;
    gap: 44px;
    align-items: center;
  }

  .page-about .partners-grid {
    grid-template-columns: 1.05fr .95fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .verify-strip {
    grid-template-columns: 1.1fr .9fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .city-map {
    height: 320px;
  }
}

@media (min-width: 1180px) {
  .page-about .intro-lead p {
    font-size: 1.125rem;
  }

  .page-about .tl-card {
    padding: 24px 22px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about [data-reveal].is-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .city-mark,
  .page-about .tl-node::after {
    transition: none;
  }
}