/* ========== 页面专属作用域：.page-about ========== */
.page-about {
  --bar: 0%;
  --tl-order: 0;
  --about-grid: rgba(255, 255, 255, 0.05);
  --about-grid-strong: rgba(255, 255, 255, 0.09);
  position: relative;
  overflow-x: hidden;
  background-color: #0D0D0F;
}

/* ---------- 品牌档案首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 36px 0 56px;
  border-bottom: 1px solid var(--c-line-strong);
  background:
    radial-gradient(circle at 85% 20%, rgba(255, 92, 0, 0.13), transparent 36%),
    radial-gradient(circle at 8% 80%, rgba(0, 194, 255, 0.07), transparent 34%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: linear-gradient(to bottom, #000 30%, transparent 95%);
  mask-image: linear-gradient(to bottom, #000 30%, transparent 95%);
  pointer-events: none;
}

.page-about .about-hero .jiyou-container {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-mid);
}

.page-about .about-crumb__link {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color 0.24s ease;
}

.page-about .about-crumb__link:hover {
  color: var(--c-brand);
}

.page-about .about-crumb__sep {
  color: var(--c-brand);
}

.page-about .about-crumb__current {
  color: var(--c-mid);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
  align-items: end;
}

.page-about .about-hero__main {
  min-width: 0;
}

.page-about .about-hero__tag {
  position: relative;
}

.page-about .about-hero__title {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-size: clamp(2rem, 7vw, 4.1rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: #FFFFFF;
}

.page-about .about-hero__sub {
  margin: 0 0 18px;
  color: var(--c-brand);
  font-family: var(--font-mono);
  font-size: clamp(0.86rem, 1.6vw, 1.15rem);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-about .about-hero__lead {
  max-width: 62ch;
  margin: 0;
  color: var(--c-light);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-hero__board {
  position: relative;
  min-width: 0;
  padding: 28px 22px 14px 36px;
  border: 1px solid var(--c-line-strong);
  background: rgba(26, 26, 29, 0.86);
  clip-path: polygon(30px 0, 100% 0, 100% 100%, 0 100%, 0 30px);
}

.page-about .about-hero__board-tick {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--c-mid);
  text-align: right;
}

.page-about .about-hero__dl {
  margin: 0;
}

.page-about .about-hero__dl-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.page-about .about-hero__dl-row:last-child {
  border-bottom: 0;
}

.page-about .about-hero__dl dt {
  color: var(--c-mid);
  font-size: 13px;
}

.page-about .about-hero__dl dd {
  margin: 0;
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
}

/* ---------- 区块标题 ---------- */
.page-about .about-section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 18px;
  margin-bottom: 40px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-section-head__tag {
  flex: 0 0 auto;
}

.page-about .about-section-head__axis {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-mid);
}

/* ---------- 01 品牌使命 ---------- */
.page-about .about-mission {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.016));
}

.page-about .about-mission__layout {
  display: grid;
  gap: 36px;
}

.page-about .about-mission__content {
  min-width: 0;
}

.page-about .about-mission__content > p {
  margin: 0 0 18px;
  color: var(--c-light);
  font-size: 15px;
  line-height: 1.9;
}

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

.page-about .about-mission__principle {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 16px 20px 16px 14px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-brand);
}

.page-about .about-mission__principle-num {
  color: var(--c-brand);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-about .about-mission__principle strong {
  display: block;
  margin-bottom: 4px;
  color: #FFFFFF;
  font-size: 15px;
}

.page-about .about-mission__principle div span {
  display: block;
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.7;
}

.page-about .about-mission__figure {
  position: relative;
  margin: 0;
  align-self: stretch;
}

.page-about .about-mission__figure::before {
  content: "";
  position: absolute;
  inset: -10px 14px 18px -14px;
  border: 1px solid var(--c-brand);
  opacity: 0.3;
  pointer-events: none;
}

.page-about .about-mission__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 560px;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06);
}

.page-about .about-mission__figure figcaption {
  margin-top: 10px;
  color: var(--c-mid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

/* ---------- 02 发展里程碑 ---------- */
.page-about .about-timeline {
  margin: 0;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  background:
    linear-gradient(90deg, rgba(255, 92, 0, 0.06) 0%, transparent 18%, transparent 100%),
    #0A0A0C;
}

.page-about .about-timeline__layout {
  display: grid;
  gap: 48px;
}

.page-about .about-timeline__track {
  min-width: 0;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 9px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-brand), rgba(255, 92, 0, 0.25));
}

.page-about .about-timeline__item {
  position: relative;
  margin: 0;
  padding: 6px 0 26px 40px;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  width: 12px;
  height: 12px;
  background: var(--c-brand);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  box-shadow: 0 0 0 4px rgba(255, 92, 0, 0.15);
}

.page-about .about-timeline__item[data-reveal].is-visible {
  transition-delay: calc(var(--tl-order, 0) * 100ms);
}

.page-about .about-timeline__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-bottom: 6px;
}

.page-about .about-timeline__year {
  color: var(--c-mid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-about .about-timeline__ver {
  display: inline-block;
  padding: 2px 9px;
  border: 1px solid rgba(255, 92, 0, 0.4);
  background: rgba(255, 92, 0, 0.1);
  color: var(--c-brand-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-about .about-timeline__item-title {
  margin: 0 0 6px;
  color: #FFFFFF;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-timeline__item-text {
  margin: 0;
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-timeline__figure {
  position: relative;
  margin: 26px 0 0 40px;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  border: 1px solid var(--c-line);
}

.page-about .about-timeline__figure figcaption {
  margin-top: 8px;
  color: var(--c-mid);
  font-family: var(--font-mono);
  font-size: 11px;
}

/* ---------- 版本标签页 ---------- */
.page-about .about-versions {
  position: relative;
  min-width: 0;
  padding: 30px 22px 30px 36px;
  border: 1px solid var(--c-line-strong);
  background: var(--c-panel);
  clip-path: polygon(30px 0, 100% 0, 100% 100%, 0 100%, 0 30px);
}

.page-about .about-versions__index {
  margin: 0 0 16px;
  color: var(--c-mid);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-align: right;
}

.page-about .version-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--c-line);
}

.page-about .version-tabs__btn {
  appearance: none;
  margin: 0;
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--c-line);
  color: var(--c-light);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  transition: border-color 0.2s, color 0.2s, background 0.2s, box-shadow 0.2s;
}

.page-about .version-tabs__btn:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-about .version-tabs__btn:hover {
  border-color: var(--c-brand);
  color: #FFFFFF;
}

.page-about .version-tabs__btn[aria-selected="true"] {
  border-color: var(--c-brand);
  background: rgba(255, 92, 0, 0.12);
  color: var(--c-brand-soft);
  box-shadow: inset 0 -2px 0 var(--c-brand);
}

.page-about .about-versions__panel {
  min-height: 148px;
}

.page-about .about-versions .jiyou-tabs__panel[aria-hidden="true"] {
  display: none;
}

.page-about .about-versions__panel-title {
  margin: 0 0 10px;
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-versions__panel-desc {
  margin: 0 0 16px;
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-versions__panel-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-versions__panel-list li {
  position: relative;
  padding: 5px 0 5px 20px;
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.7;
}

.page-about .about-versions__panel-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 4px;
  color: var(--c-cyan);
  font-family: var(--font-mono);
}

/* ---------- 03 数据服务能力 ---------- */
.page-about .about-capability {
  position: relative;
  background:
    linear-gradient(rgba(0, 194, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 194, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
}

.page-about .about-capability__stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 0 0 32px;
  border: 1px solid var(--c-line);
  background: var(--c-line);
}

.page-about .about-capability__stat {
  min-width: 0;
  padding: 22px 18px 18px;
  background: #121216;
}

.page-about .about-capability__stat dt {
  margin-bottom: 8px;
  color: var(--c-mid);
  font-size: 12px;
}

.page-about .about-capability__stat dd {
  margin: 0;
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: clamp(19px, 1.6vw, 24px);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-about .about-capability__layout {
  display: grid;
  gap: 36px;
}

.page-about .about-capability__flow {
  min-width: 0;
  padding: 24px 22px;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

.page-about .about-capability__flow-title {
  margin: 0 0 20px;
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-capability__pipeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-capability__pipeline li {
  position: relative;
  padding: 0 0 22px 38px;
}

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

.page-about .about-capability__pipeline li::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 22px;
  height: calc(100% - 2px);
  width: 1px;
  background: var(--c-line);
}

.page-about .about-capability__pipeline li:last-child::before {
  display: none;
}

.page-about .about-capability__pipe-num {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border: 1px solid var(--c-brand);
  color: var(--c-brand);
  background: var(--c-panel);
  font-family: var(--font-mono);
  font-size: 10px;
  transform: rotate(45deg);
}

.page-about .about-capability__pipe-num i {
  display: block;
  transform: rotate(-45deg);
  font-style: normal;
}

.page-about .about-capability__pipeline strong {
  display: block;
  margin-bottom: 4px;
  color: #FFFFFF;
  font-size: 15px;
}

.page-about .about-capability__pipeline p {
  margin: 0;
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.7;
}

.page-about .about-capability__desc {
  margin: 22px 0 0;
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-capability__chart {
  min-width: 0;
}

.page-about .about-capability__figure {
  position: relative;
  margin: 0 0 24px;
}

.page-about .about-capability__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--c-line);
}

.page-about .about-capability__figure figcaption {
  margin-top: 8px;
  color: var(--c-mid);
  font-family: var(--font-mono);
  font-size: 11px;
}

.page-about .about-capability__bars {
  display: grid;
  gap: 14px;
}

.page-about .about-capability__row {
  display: grid;
  grid-template-columns: 118px 1fr 72px;
  gap: 12px;
  align-items: center;
}

.page-about .about-capability__row span {
  color: var(--c-light);
  font-size: 13px;
}

.page-about .about-capability__row .bar {
  position: relative;
  display: block;
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.page-about .about-capability__row .bar b {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--bar);
  background: linear-gradient(90deg, var(--c-brand), var(--c-brand-soft));
  transition: width 0.4s ease, background 0.4s ease;
}

.page-about .about-capability__row:hover .bar b {
  background: linear-gradient(90deg, var(--c-cyan), var(--c-cyan-soft));
}

.page-about .about-capability__row strong {
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-align: right;
}

/* ---------- 04 资质与认证 ---------- */
.page-about .about-security {
  border-top: 1px solid var(--c-line);
}

.page-about .about-security__grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--c-line);
  background: var(--c-line);
}

.page-about .about-security__card {
  position: relative;
  min-width: 0;
  padding: 26px 24px 24px;
  background: #121216;
}

.page-about .about-security__num {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--c-brand);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-about .about-security__num::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--c-brand);
}

.page-about .about-security__card h3 {
  margin: 0 0 10px;
  color: #FFFFFF;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-security__card p {
  margin: 0;
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-security__note {
  margin: 18px 0 0;
  color: var(--c-mid);
  font-size: 12px;
  line-height: 1.7;
}

/* ---------- 05 合作关系与荣誉 ---------- */
.page-about .about-partners {
  background: #0A0A0C;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-partners__card {
  position: relative;
  min-width: 0;
  padding: 34px 22px 26px 24px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 0 100%);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-partners__card:hover {
  border-color: var(--c-brand);
  background: #1D1D21;
}

.page-about .about-partners__num {
  position: absolute;
  top: 12px;
  right: 14px;
  color: var(--c-mid);
  font-family: var(--font-mono);
  font-size: 11px;
}

.page-about .about-partners__card h3 {
  margin: 0 0 10px;
  color: #FFFFFF;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-partners__card p {
  margin: 0;
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-partners__honor {
  margin: 28px 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--c-cyan);
  background: rgba(0, 194, 255, 0.06);
  color: var(--c-light);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 06 站内引导 ---------- */
.page-about .about-paths__title {
  margin: 0 0 28px;
  color: #FFFFFF;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-paths__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-paths__card {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 4px 14px;
  padding: 18px 20px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  text-decoration: none;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-paths__card:hover,
.page-about .about-paths__card:focus-visible {
  border-color: var(--c-brand);
  transform: translateX(4px);
}

.page-about .about-paths__card:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-about .about-paths__num {
  grid-row: span 2;
  color: var(--c-brand);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-about .about-paths__card strong {
  color: #FFFFFF;
  font-size: 16px;
}

.page-about .about-paths__card span:last-child {
  color: var(--c-light);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 响应式：平板与桌面 ---------- */
@media (min-width: 640px) {
  .page-about .about-capability__stat-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

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

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.8fr) minmax(280px, 1fr);
    gap: 56px;
  }

  .page-about .about-mission__layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 64px;
  }

  .page-about .about-timeline__layout {
    grid-template-columns: minmax(0, 1fr) minmax(330px, 0.85fr);
    gap: 48px;
  }

  .page-about .about-capability__layout {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 48px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-paths__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}