/* ============================================
   品牌档案 / brand-about
   作用域：.page-about
   ============================================ */

.page-about {
  --about-cut: 20px;
  --about-rail: 28px;
  display: block;
  background: var(--ink-deep);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .section {
  padding: 44px 0;
}

@media (min-width: 900px) {
  .page-about .section {
    padding: 76px 0;
  }
}

/* ---------- 通用小标题组 ---------- */

.page-about .about-head {
  max-width: 64ch;
}

.page-about .about-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(23px, 3.3vw, 30px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-head p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--slate-muted);
}

@media (min-width: 900px) {
  .page-about .about-head p {
    font-size: 16px;
  }
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-top: 28px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -10%;
  width: min(78vw, 700px);
  height: calc(100% + 90px);
  background: linear-gradient(148deg, rgba(53, 227, 210, 0.18) 0%, rgba(76, 107, 240, 0.12) 44%, rgba(7, 16, 31, 0) 76%);
  -webkit-clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 5.6vw, 44px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero .lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.84;
}

@media (min-width: 900px) {
  .page-about .about-hero .lede {
    font-size: 17px;
  }
}

/* ---------- 关键数字条 ---------- */

.page-about .stat-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 34px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-about .stat-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 44px;
  }
}

.page-about .stat-strip__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 16px;
  background: var(--ink-panel);
  transition: background-color 0.2s var(--ease);
}

.page-about .stat-strip__item:hover {
  background: #162c4a;
}

.page-about .stat-strip__num {
  align-self: flex-start;
  padding: 3px 9px;
  border: 1px solid var(--amber-mark);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--amber-soft);
  white-space: nowrap;
}

.page-about .stat-strip__label {
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--slate-muted);
}

/* ---------- 发展历程 ---------- */

.page-about .about-history {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.page-about .history-backdrop {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.1;
  pointer-events: none;
}

.page-about .history-backdrop img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.6);
}

.page-about .history-stack {
  position: relative;
  margin: 38px 0 0;
  padding: 0 0 0 var(--about-rail);
  list-style: none;
  display: grid;
  gap: 18px;
}

@media (min-width: 900px) {
  .page-about .history-stack {
    margin-top: 48px;
    gap: 22px;
  }
}

.page-about .history-stack::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-signal) 0%, rgba(53, 227, 210, 0.14) 100%);
}

.page-about .history-card {
  position: relative;
  padding: 1px;
  background: var(--ink-line);
  -webkit-clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  transition: background-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .history-card::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 26px;
  width: 10px;
  height: 10px;
  box-sizing: border-box;
  border: 2px solid var(--cyan-signal);
  border-radius: 50%;
  background: var(--ink-deep);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .history-card:hover,
.page-about .history-card:focus-within {
  background: var(--cyan-signal);
  transform: translateY(-2px);
}

.page-about .history-card:focus-visible {
  outline: 2px solid var(--amber-mark);
  outline-offset: 2px;
}

.page-about .history-card__inner {
  height: 100%;
  padding: 22px 18px 20px;
  background: var(--ink-panel);
  -webkit-clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
}

@media (min-width: 900px) {
  .page-about .history-card__inner {
    padding: 26px 28px 24px;
  }
}

.page-about .history-card__period {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber-mark);
}

.page-about .history-card h3 {
  margin: 10px 0 0;
  max-width: 30ch;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.4vw, 21px);
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-about .history-card p {
  margin: 12px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-muted);
}

.page-about .history-card__extra {
  padding-left: 13px;
  border-left: 2px solid var(--ink-line);
  font-size: 14px !important;
  color: #7f95b0 !important;
}

@media (hover: hover) and (pointer: fine) {
  .page-about .history-card__extra {
    max-height: 0;
    opacity: 0;
    margin-top: 0 !important;
    overflow: hidden;
    transition: max-height 0.28s var(--ease), opacity 0.28s var(--ease), margin-top 0.28s var(--ease);
  }

  .page-about .history-card:hover .history-card__extra,
  .page-about .history-card:focus-within .history-card__extra {
    max-height: 150px;
    opacity: 1;
    margin-top: 12px !important;
  }
}

.page-about .about-history__more {
  margin: 30px 0 0;
  padding-left: var(--about-rail);
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-muted);
}

.page-about .about-history__more a {
  color: var(--cyan-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 227, 210, 0.4);
}

.page-about .about-history__more a:hover {
  color: var(--cyan-mist);
  border-bottom-color: var(--cyan-mist);
}

/* ---------- 团队与分工 ---------- */

.page-about .team-grid {
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 640px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1040px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 44px;
  }
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 18px;
  background: var(--ink-panel);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .team-card:hover {
  border-color: var(--cyan-signal);
  background: #162c4a;
  transform: translateY(-2px);
}

.page-about .team-card__icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--cyan-signal);
  border-radius: 2px;
  color: var(--cyan-signal);
  -webkit-clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
}

.page-about .team-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate-muted);
}

.page-about .team-card a {
  color: var(--cyan-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 227, 210, 0.4);
}

.page-about .team-card a:hover {
  color: var(--cyan-mist);
  border-bottom-color: var(--cyan-mist);
}

/* ---------- 覆盖范围 ---------- */

.page-about .reach-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-about .reach-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 44px;
    align-items: start;
  }
}

.page-about .reach-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .reach-list__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 13px 16px;
  border-left: 2px solid var(--ink-line);
  background: linear-gradient(90deg, rgba(19, 39, 67, 0.92) 0%, rgba(19, 39, 67, 0.28) 100%);
  transition: border-left-color 0.22s var(--ease), background 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .reach-list__item:hover {
  border-left-color: var(--amber-mark);
  background: linear-gradient(90deg, rgba(53, 227, 210, 0.14) 0%, rgba(19, 39, 67, 0.28) 100%);
  transform: translateX(2px);
}

.page-about .reach-list__zone {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--cyan-signal);
}

.page-about .reach-list__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate-muted);
}

/* ---------- 图片容器 ---------- */

.page-about .about-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  background: var(--ink-panel);
  overflow: hidden;
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72);
}

.page-about .about-media__caption {
  padding: 11px 15px;
  border-top: 1px solid var(--ink-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-muted);
}

/* ---------- 合作生态 ---------- */

.page-about .eco-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-about .eco-layout {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: 44px;
    align-items: start;
  }
}

.page-about .eco-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .eco-list__item {
  padding: 14px 16px;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  background: var(--ink-panel);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .eco-list__item:hover {
  border-color: var(--cyan-signal);
  transform: translateY(-2px);
}

.page-about .eco-list__tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--amber-mark);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--amber-soft);
}

.page-about .eco-list__item p {
  margin: 9px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--slate-muted);
}

.page-about .eco-note {
  margin: 22px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate-muted);
}

.page-about .eco-note a {
  color: var(--cyan-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 227, 210, 0.4);
}

.page-about .eco-note a:hover {
  color: var(--cyan-mist);
  border-bottom-color: var(--cyan-mist);
}

/* ---------- 服务承诺 ---------- */

.page-about .commit-panel {
  position: relative;
  padding: 28px 20px 26px;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  background:
    linear-gradient(138deg, rgba(53, 227, 210, 0.1) 0%, rgba(76, 107, 240, 0.07) 42%, rgba(7, 16, 31, 0) 78%),
    var(--ink-panel);
}

@media (min-width: 900px) {
  .page-about .commit-panel {
    padding: 38px 40px 34px;
  }
}

.page-about .commit-panel__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.34;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .commit-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 760px) {
  .page-about .commit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    margin-top: 32px;
  }
}

.page-about .commit-item {
  padding-top: 16px;
  border-top: 1px solid var(--ink-line);
}

.page-about .commit-item__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--amber-mark);
}

.page-about .commit-item h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .commit-item p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate-muted);
  word-break: break-word;
}

.page-about .commit-item a {
  color: var(--cyan-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 227, 210, 0.4);
}

.page-about .commit-item a:hover {
  color: var(--cyan-mist);
  border-bottom-color: var(--cyan-mist);
}

.page-about .commit-panel__foot {
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--ink-line);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate-muted);
}

.page-about .commit-panel__foot a {
  color: var(--cyan-signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 227, 210, 0.4);
}

.page-about .commit-panel__foot a:hover {
  color: var(--cyan-mist);
  border-bottom-color: var(--cyan-mist);
}

/* ---------- 显现动画 ---------- */

.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

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

.page-about .history-card[data-reveal] {
  transform: translateY(10px);
}

.page-about .history-card[data-reveal].is-visible {
  transform: none;
}

.page-about .history-card[data-reveal]:hover,
.page-about .history-card[data-reveal]:focus-within {
  transform: translateY(-2px);
}

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

  .page-about .history-card,
  .page-about .team-card,
  .page-about .eco-list__item,
  .page-about .reach-list__item {
    transition: none;
  }

  .page-about .history-card:hover,
  .page-about .history-card:focus-within,
  .page-about .team-card:hover,
  .page-about .eco-list__item:hover,
  .page-about .reach-list__item:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>