/* ===== 品牌自述页 · 专属样式 ===== */

.page-about {
  --about-glow: radial-gradient(circle at 20% 10%, rgba(108, 77, 230, 0.30), rgba(108, 77, 230, 0) 62%);
  --about-card-bg: linear-gradient(155deg, rgba(18, 27, 51, 0.88), rgba(11, 18, 36, 0.82));
}

.page-about section {
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-top: 0.6rem;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -140px -20% 40% -35%;
  background: var(--about-glow);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 2rem;
  align-items: start;
  padding-bottom: 1.4rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.95rem, 6.2vw, 3.25rem);
  line-height: 1.16;
  letter-spacing: 0.012em;
  color: var(--silver);
  margin: 0.65rem 0 1rem;
  max-width: 18ch;
}

.page-about .about-lede {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--grey);
  margin: 0 0 1.3rem;
  max-width: 50ch;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .fact {
  background: var(--ink-800);
  padding: 1.05rem 1.05rem 1.15rem;
  display: grid;
  gap: 0.35rem;
  align-content: start;
}

.page-about .fact-value {
  font-size: 1.55rem;
  line-height: 1.1;
  color: var(--teal);
  letter-spacing: 0.02em;
}

.page-about .fact-label {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--grey);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin-grid {
  display: grid;
  gap: 1.8rem;
  align-items: center;
}

.page-about .about-origin-text p {
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--grey);
  margin: 0 0 1rem;
}

.page-about .about-origin-text p:last-of-type {
  margin-bottom: 0;
}

.page-about .origin-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-about .origin-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: baseline;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--grey);
}

.page-about .origin-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .origin-list .mono {
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--violet-soft);
}

.page-about .about-origin-figure,
.page-about .about-team-figure,
.page-about .patent-figure,
.page-about .network-figure {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

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

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .timeline-item {
  position: relative;
  padding-left: 1.6rem;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line-strong);
}

.page-about .timeline-item:last-child::before {
  background: linear-gradient(var(--line-strong), transparent);
}

.page-about .timeline-item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 1.5rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--violet);
  box-shadow: 0 0 0 4px rgba(108, 77, 230, 0.12);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .timeline-item:has(details[open])::after {
  border-color: var(--teal);
  box-shadow: 0 0 0 5px rgba(47, 212, 198, 0.14);
}

.page-about .timeline details {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--about-card-bg);
  transition: border-color 0.25s ease;
}

.page-about .timeline details[open] {
  border-color: rgba(47, 212, 198, 0.34);
}

.page-about .timeline summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 0.95rem 1.05rem;
}

.page-about .timeline summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.1;
  color: var(--teal);
  transition: transform 0.25s ease;
}

.page-about .timeline details[open] summary::after {
  transform: rotate(45deg);
}

.page-about .timeline summary:focus-visible {
  outline: 2px solid var(--violet-soft);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.page-about .tl-num {
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--violet-soft);
  padding-top: 0.2rem;
}

.page-about .tl-head {
  display: grid;
  gap: 0.2rem;
}

.page-about .tl-stage {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--teal);
}

.page-about .tl-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--silver);
}

.page-about .tl-body {
  padding: 0 1.05rem 1.05rem;
  border-top: 1px solid var(--line);
  margin-top: 0.15rem;
}

.page-about .tl-body p {
  margin: 0.85rem 0 0;
  font-size: 0.89rem;
  line-height: 1.8;
  color: var(--grey);
}

/* ---------- 专利墙 ---------- */
.page-about .patent-board {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.page-about .filter-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .filter-label {
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--grey);
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-about .filter-label:hover {
  color: var(--silver);
  border-color: var(--line-strong);
}

.page-about .filter-input:checked + .filter-label {
  color: var(--ink-900);
  background: var(--teal);
  border-color: var(--teal);
}

.page-about .filter-input:focus-visible + .filter-label {
  outline: 2px solid var(--violet-soft);
  outline-offset: 2px;
}

.page-about .patent-wall {
  flex: 1 1 100%;
  margin-top: 1.3rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-about #pd-flow:checked ~ .patent-wall .patent-card:not([data-dir="flow"]),
.page-about #pd-data:checked ~ .patent-wall .patent-card:not([data-dir="data"]),
.page-about #pd-brand:checked ~ .patent-wall .patent-card:not([data-dir="brand"]),
.page-about #pd-deliver:checked ~ .patent-wall .patent-card:not([data-dir="deliver"]) {
  display: none;
}

.page-about .patent-card {
  position: relative;
  padding: 1.15rem 1.15rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--about-card-bg);
  overflow: hidden;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .patent-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--teal), transparent);
  opacity: 0.75;
}

.page-about .patent-card:hover {
  border-color: rgba(47, 212, 198, 0.34);
  transform: translateY(-2px);
}

.page-about .patent-id {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--teal);
  margin: 0;
}

.page-about .patent-name {
  font-family: var(--font-heading);
  font-size: 1.04rem;
  line-height: 1.5;
  color: var(--silver);
  margin: 0.4rem 0 0.55rem;
}

.page-about .patent-desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--grey);
}

.page-about .patent-tag {
  display: inline-block;
  margin-top: 0.9rem;
  padding: 0.22rem 0.62rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--violet-soft);
}

.page-about .patent-note {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.page-about .patent-note-title {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  line-height: 1.5;
  color: var(--silver);
  margin: 0 0 0.75rem;
}

.page-about .patent-note-text p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--grey);
}

.page-about .note-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .note-list li {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--grey);
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed var(--line);
}

.page-about .note-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .note-list .mono {
  color: var(--teal);
  font-size: 0.95rem;
  min-width: 2.6rem;
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 1.8rem;
  align-items: center;
}

.page-about .about-team-copy p {
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--grey);
  margin: 0 0 1rem;
}

.page-about .ratio {
  margin-top: 1.6rem;
  padding: 1.15rem 1.15rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 18, 36, 0.62);
}

.page-about .ratio-bar {
  display: flex;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--ink-700);
  border: 1px solid var(--line);
}

.page-about .ratio-seg {
  display: block;
  height: 100%;
}

.page-about .ratio-seg--rnd {
  width: 45%;
  background: linear-gradient(90deg, var(--violet), var(--violet-soft));
}

.page-about .ratio-seg--ops {
  width: 55%;
  background: linear-gradient(90deg, var(--teal-deep), var(--blue));
}

.page-about .ratio-legend {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .ratio-legend li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--grey);
}

.page-about .ratio-legend .mono {
  color: var(--silver);
  font-size: 0.85rem;
}

.page-about .ratio-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.page-about .ratio-dot--rnd {
  background: var(--violet-soft);
}

.page-about .ratio-dot--ops {
  background: var(--teal);
}

/* ---------- 服务网络 ---------- */
.page-about .network-grid {
  display: grid;
  gap: 1.4rem;
}

.page-about .node-cards {
  display: grid;
  gap: 1rem;
}

.page-about .node-card {
  position: relative;
  padding: 1.2rem 1.2rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--about-card-bg);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .node-card--hub::before,
.page-about .node-card--sat::before {
  content: "";
  position: absolute;
  left: 1.2rem;
  top: 0;
  width: 46px;
  height: 2px;
}

.page-about .node-card--hub::before {
  background: var(--violet);
}

.page-about .node-card--sat::before {
  background: var(--teal);
}

.page-about .node-card:hover,
.page-about .node-card:focus-visible {
  border-color: var(--line-strong);
  background: linear-gradient(155deg, rgba(18, 27, 51, 0.96), rgba(11, 18, 36, 0.9));
  outline: none;
}

.page-about .node-count {
  font-size: 1.7rem;
  line-height: 1;
  color: var(--teal);
  margin: 0.3rem 0 0.5rem;
  letter-spacing: 0.04em;
}

.page-about .node-card--hub .node-count {
  color: var(--violet-soft);
}

.page-about .node-title {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  color: var(--silver);
  margin: 0 0 0.55rem;
}

.page-about .node-desc {
  margin: 0;
  font-size: 0.89rem;
  line-height: 1.8;
  color: var(--grey);
}

.page-about .node-tip {
  margin: 0.95rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--dim);
  opacity: 0.6;
  transition: opacity 0.25s ease, color 0.25s ease;
}

.page-about .node-card:hover .node-tip,
.page-about .node-card:focus-visible .node-tip {
  opacity: 1;
  color: var(--teal);
}

.page-about .network-map {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 34% 54%, rgba(47, 212, 198, 0.10), transparent 58%),
    linear-gradient(160deg, rgba(18, 27, 51, 0.78), rgba(5, 9, 20, 0.86));
  padding: 0.6rem;
  box-sizing: border-box;
}

.page-about .region-line {
  margin-top: 1.8rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.85rem;
}

.page-about .region-label {
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--violet-soft);
}

.page-about .region-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .region-list li {
  padding: 0.34rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--silver);
  background: rgba(18, 27, 51, 0.6);
}

.page-about .region-note {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--grey);
}

.page-about .region-note a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 212, 198, 0.4);
}

.page-about .region-note a:hover {
  color: var(--violet-soft);
  border-bottom-color: var(--violet-soft);
}

/* ---------- 资质 ---------- */
.page-about .cred-grid {
  display: grid;
  gap: 1rem;
}

.page-about .cred-card {
  padding: 1.25rem 1.25rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 18, 36, 0.66);
  position: relative;
}

.page-about .cred-card--wide {
  background: linear-gradient(140deg, rgba(108, 77, 230, 0.16), rgba(47, 212, 198, 0.08));
  border-color: rgba(108, 77, 230, 0.34);
}

.page-about .cred-mark {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--teal);
  margin: 0 0 0.7rem;
}

.page-about .cred-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--silver);
  margin: 0 0 0.6rem;
}

.page-about .cred-card p:last-child {
  margin: 0;
  font-size: 0.89rem;
  line-height: 1.8;
  color: var(--grey);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta-inner {
  display: grid;
  gap: 1.5rem;
  padding: 2rem 1.4rem;
  border: 1px solid rgba(47, 212, 198, 0.26);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 88% 12%, rgba(108, 77, 230, 0.28), transparent 58%),
    linear-gradient(150deg, rgba(18, 27, 51, 0.94), rgba(5, 9, 20, 0.94));
  align-items: center;
}

.page-about .about-cta-copy h2 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  line-height: 1.4;
  color: var(--silver);
  margin: 0 0 0.7rem;
}

.page-about .about-cta-copy p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--grey);
  max-width: 56ch;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .patent-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .cred-card--wide {
    grid-column: 1 / -1;
  }

  .page-about .region-line {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 0.85rem 1.4rem;
  }

  .page-about .region-note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 0.96fr) minmax(0, 1.04fr);
    gap: 2.8rem;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 2.8rem;
  }

  .page-about .network-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 2.4rem;
    align-items: center;
  }

  .page-about .patent-note {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.6rem;
    align-items: center;
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2.4rem;
    padding: 2.6rem 2.4rem;
  }

  .page-about .about-cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1080px) {
  .page-about .patent-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .cred-card--wide {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .patent-card,
  .page-about .node-card,
  .page-about .node-tip,
  .page-about .timeline summary::after {
    transition: none;
  }

  .page-about .patent-card:hover {
    transform: none;
  }
}