/* ===== 平台总览页 /overview/ ===== */

.page-about {
  --ab-rail: 236px;
  padding-block: clamp(20px, 3.4vw, 40px) clamp(48px, 8vw, 96px);
}

/* --- 面包屑 --- */
.page-about .about-crumbs-nav {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-about .about-crumbs li {
  display: flex;
  align-items: center;
  color: var(--muted);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin: 0 10px;
  color: rgba(147, 166, 196, 0.4);
}

.page-about .about-crumbs li[aria-current="page"] {
  font-family: var(--font-mono);
  color: var(--amber);
}

/* --- 首屏封面 --- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4.4vw, 54px) clamp(20px, 3.4vw, 48px) clamp(24px, 4vw, 46px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: #070c18;
  background-image:
    repeating-linear-gradient(0deg, rgba(147, 166, 196, 0.05) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, rgba(147, 166, 196, 0.05) 0 1px, transparent 1px 64px),
    radial-gradient(120% 130% at 4% -10%, rgba(0, 229, 255, 0.15), transparent 58%),
    radial-gradient(90% 120% at 102% 108%, rgba(255, 61, 174, 0.12), transparent 62%);
}

.page-about .about-title {
  margin: 14px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 64px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 64ch;
  color: var(--muted);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
}

/* --- 首屏指标条 --- */
.page-about .about-quick {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
  margin-top: clamp(26px, 4vw, 42px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-quick-item {
  --acc: var(--cyan);
  --acc-glow: rgba(0, 229, 255, 0.5);
  position: relative;
  padding-left: 14px;
}

.page-about .about-quick-item[data-accent="cyan"] {
  --acc: var(--cyan);
  --acc-glow: rgba(0, 229, 255, 0.5);
}

.page-about .about-quick-item[data-accent="amber"] {
  --acc: var(--amber);
  --acc-glow: rgba(255, 176, 32, 0.5);
}

.page-about .about-quick-item[data-accent="magenta"] {
  --acc: var(--magenta);
  --acc-glow: rgba(255, 61, 174, 0.45);
}

.page-about .about-quick-item[data-accent="violet"] {
  --acc: var(--violet);
  --acc-glow: rgba(122, 92, 255, 0.5);
}

.page-about .about-quick-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 6px;
  width: 3px;
  border-radius: 2px;
  background: var(--acc);
  box-shadow: 0 0 12px var(--acc-glow);
}

.page-about .about-quick-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
  text-shadow: 0 0 22px var(--acc-glow);
}

.page-about .about-quick-unit {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--acc);
}

.page-about .about-quick-item p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* --- 主体两栏 --- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  margin-top: clamp(34px, 5.5vw, 68px);
}

/* --- 目录索引 --- */
.page-about .about-rail-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-index {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index li {
  flex: 0 0 auto;
}

.page-about .about-index .index-item {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 11px;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  font-size: 13.5px;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index .index-item:hover {
  color: var(--text);
  background: rgba(0, 229, 255, 0.07);
}

.page-about .about-index .index-item.is-active {
  color: var(--text);
  background: rgba(0, 229, 255, 0.09);
  border-bottom-color: var(--cyan);
}

.page-about .about-index .index-no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--violet);
  transition: color 0.2s var(--ease);
}

.page-about .about-index .index-item.is-active .index-no {
  color: var(--amber);
}

/* --- 舱段通用 --- */
.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
  padding-top: clamp(26px, 3.6vw, 42px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-section + .about-section {
  margin-top: clamp(36px, 5vw, 62px);
}

.page-about .section-num {
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--magenta);
  transition: color 0.3s var(--ease), text-shadow 0.3s var(--ease);
}

.page-about .about-section.is-lit .section-num {
  color: var(--amber);
  text-shadow: 0 0 14px rgba(255, 176, 32, 0.7);
}

.page-about .about-note {
  margin: 18px 0 0;
  max-width: 72ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* --- 三块业务 --- */
.page-about .about-tri {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-about .about-cell {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--panel);
  overflow: hidden;
}

.page-about .about-cell::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
}

.page-about .about-cell--cyan::before {
  background: linear-gradient(90deg, var(--cyan), rgba(0, 229, 255, 0.05));
}

.page-about .about-cell--magenta::before {
  background: linear-gradient(90deg, var(--magenta), rgba(255, 61, 174, 0.05));
}

.page-about .about-cell--violet::before {
  background: linear-gradient(90deg, var(--violet), rgba(122, 92, 255, 0.05));
}

.page-about .about-cell--cyan {
  background: linear-gradient(175deg, rgba(0, 229, 255, 0.07), transparent 55%), var(--panel);
}

.page-about .about-cell--magenta {
  background: linear-gradient(175deg, rgba(255, 61, 174, 0.07), transparent 55%), var(--panel);
}

.page-about .about-cell--violet {
  background: linear-gradient(175deg, rgba(122, 92, 255, 0.08), transparent 55%), var(--panel);
}

.page-about .about-cell-tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-cell .card-title {
  margin: 0;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-cell-text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-mini-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-about .about-mini-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-mini-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(0, 229, 255, 0.7);
}

.page-about .about-cell-link {
  margin-top: auto;
  padding-top: 16px;
  font-size: 13.5px;
}

/* --- 数据生产流程 --- */
.page-about .about-flow {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 20px;
}

.page-about .about-flow-no {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
}

.page-about .about-flow-step h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-flow-step p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* --- 图片 --- */
.page-about .about-figure {
  margin: clamp(24px, 3.6vw, 38px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: #070c18;
  object-fit: cover;
}

.page-about .media-caption {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-about .about-figure--band img {
  border-color: rgba(122, 92, 255, 0.3);
}

/* --- 安装包表 --- */
.page-about .table-wrap {
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-about .about-table caption {
  text-align: left;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: 22px;
}

/* --- 礼包 --- */
.page-about .about-gift-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 14px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-about .about-gift {
  padding: 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(170deg, rgba(122, 92, 255, 0.09), transparent 62%), var(--panel);
}

.page-about .about-gift h3 {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-gift p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* --- 团队 --- */
.page-about .about-team {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 14px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-about .about-team-card {
  padding: 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-about .about-team-card h3 {
  margin: 0;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-team-card p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-partner {
  margin-top: 20px;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid rgba(0, 229, 255, 0.24);
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.05);
}

.page-about .about-partner-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-partner p {
  margin: 0;
  max-width: 76ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-partner .link {
  display: inline-block;
  margin-top: 14px;
  font-size: 13.5px;
}

/* --- 时间线 --- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  padding: 0 0 0 28px;
  list-style: none;
  display: grid;
  gap: 24px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--violet), var(--cyan) 58%, var(--amber));
  opacity: 0.6;
}

.page-about .about-tl-item {
  position: relative;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  transform: rotate(45deg);
  background: var(--violet);
  box-shadow: 0 0 12px rgba(122, 92, 255, 0.85);
  transition: background-color 0.24s var(--ease), transform 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .about-tl-item:hover::before {
  background: var(--amber);
  transform: rotate(45deg) scale(1.25);
  box-shadow: 0 0 18px rgba(255, 176, 32, 0.9);
}

.page-about .about-tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-tl-title {
  margin: 6px 0 0;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
}

.page-about .about-tl-item p {
  margin: 8px 0 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* --- 规模 --- */
.page-about .about-scale {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.page-about .about-metric-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(23px, 3vw, 33px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
  text-shadow: 0 0 22px rgba(0, 229, 255, 0.35);
}

.page-about .about-metric-label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

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

.page-about .about-map img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: #070c18;
  object-fit: cover;
}

.page-about .about-honor {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 20px;
  padding: 16px 18px;
  border: 1px dashed rgba(0, 229, 255, 0.28);
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.045);
}

.page-about .about-honor-item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* --- 结尾引导 --- */
.page-about .about-outro {
  margin-top: clamp(40px, 6vw, 78px);
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background-color: var(--panel);
  background-image:
    radial-gradient(100% 130% at 0% 0%, rgba(0, 229, 255, 0.13), transparent 60%),
    radial-gradient(100% 130% at 100% 100%, rgba(255, 176, 32, 0.1), transparent 60%);
}

.page-about .about-outro-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-outro-text {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-about .about-outro-fine {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* --- 响应式 --- */
@media (min-width: 620px) {
  .page-about .about-quick {
    gap: 20px 18px;
  }
}

@media (min-width: 820px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-flow-step {
    padding: 0 22px;
  }

  .page-about .about-flow-step:first-child {
    padding-left: 0;
  }

  .page-about .about-flow-step:last-child {
    padding-right: 0;
  }

  .page-about .about-flow-step + .about-flow-step {
    border-left: 1px solid var(--line-soft);
  }

  .page-about .about-tri {
    grid-template-columns: 1.15fr 1fr 1fr;
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .about-index {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index li {
    width: 100%;
  }

  .page-about .about-index .index-item {
    border-bottom: 0;
    border-left: 2px solid transparent;
    white-space: normal;
    line-height: 1.45;
  }

  .page-about .about-index .index-item.is-active {
    border-left-color: var(--cyan);
  }
}

@media (min-width: 1040px) {
  .page-about .about-scale {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
    gap: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-item::before,
  .page-about .about-index .index-item,
  .page-about .section-num {
    transition: none;
  }

  .page-about .about-tl-item:hover::before {
    transform: rotate(45deg);
  }
}