/* ===== 品牌概况页 · 页面专属 ===== */
.page-about {
  --about-glow-green: rgba(57, 255, 136, .35);
  --about-glow-orange: rgba(255, 107, 26, .25);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: calc(var(--header-h) + var(--ticker-h) + 44px);
  padding-bottom: 56px;
  background:
    linear-gradient(180deg, rgba(57, 255, 136, .05), transparent 45%),
    linear-gradient(rgba(42, 53, 86, .35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 53, 86, .35) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
}

.page-about .breadcrumbs {
  margin-bottom: 36px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero__content {
  position: relative;
  padding: 28px 24px;
  background: rgba(19, 26, 58, .96);
  border: 1px solid var(--divider);
  box-shadow: 8px 8px 0 rgba(57, 255, 136, .12);
}

.page-about .about-hero__content::after {
  content: "SC-OBS / PROFILE-01";
  position: absolute;
  right: 14px;
  top: -13px;
  padding: 2px 8px;
  background: var(--bg-elev);
  border: 1px solid var(--divider);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--accent);
  letter-spacing: .05em;
}

.page-about .about-hero__content h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 5vw, 3.1rem);
  line-height: 1.18;
  text-transform: uppercase;
  letter-spacing: .02em;
  color: var(--text);
  max-width: 640px;
  margin: 12px 0 0;
}

.page-about .about-hero__lead {
  margin: 20px 0 14px;
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-hero__desc {
  font-size: .95rem;
  line-height: 1.9;
  color: var(--text-2);
  margin-bottom: 28px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-hero__visual {
  position: relative;
  border: 1px solid var(--divider);
  padding: 12px;
  background: var(--bg-card);
  box-shadow: 0 0 0 4px var(--bg-card), 8px 8px 0 rgba(57, 255, 136, .15);
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-hero__visual::after {
  content: "VIS / 01 · TRACK & DATA";
  position: absolute;
  right: 20px;
  bottom: 20px;
  padding: 4px 10px;
  background: rgba(11, 16, 38, .9);
  border: 1px solid var(--divider);
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--text-2);
  letter-spacing: .08em;
}

/* ---------- 品牌使命 / 关于 ---------- */
.page-about .about-mission {
  padding: 64px 0;
  border-top: 1px solid var(--divider);
}

.page-about .about-mission__grid {
  display: grid;
  gap: 40px;
}

.page-about .about-mission__main h2,
.page-about .section-head h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  line-height: 1.24;
  text-transform: uppercase;
  letter-spacing: .02em;
  margin: 10px 0 20px;
  color: var(--text);
}

.page-about .about-mission__main p {
  color: var(--text-2);
  line-height: 1.9;
  margin-bottom: 16px;
}

.page-about .about-mission__link {
  display: inline-block;
  margin-top: 8px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: .9rem;
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .about-mission__link:hover,
.page-about .about-mission__link:focus-visible {
  color: var(--accent-2);
  border-color: var(--accent-2);
}

.page-about .about-mission__aside .panel-note {
  border: 1px solid var(--divider);
  border-top: 4px solid var(--accent-2);
  background: var(--bg-card);
  padding: 24px;
  box-shadow: 6px 6px 0 rgba(255, 107, 26, .14);
}

.page-about .about-mission__aside .panel-note__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
  letter-spacing: .04em;
}

.page-about .about-mission__list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-mission__list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--divider);
  font-size: .925rem;
  color: var(--text-2);
}

.page-about .about-mission__list li:last-child {
  border-bottom: none;
}

.page-about .about-mission__list li span:last-child {
  font-family: var(--font-mono);
  color: var(--accent);
  text-align: right;
  white-space: nowrap;
}

/* ---------- 发展历程 ---------- */
.page-about .about-journey {
  padding: 64px 0;
  background:
    linear-gradient(rgba(42, 53, 86, .4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 53, 86, .4) 1px, transparent 1px),
    var(--bg-card);
  background-size: 40px 40px, 40px 40px, auto;
  border-top: 4px solid var(--accent-2);
  border-bottom: 1px solid var(--divider);
}

.page-about .section-head {
  max-width: 780px;
  margin-bottom: 40px;
}

.page-about .section-head > p:not(.kicker) {
  color: var(--text-2);
  line-height: 1.8;
}

.page-about .about-journey__layout {
  display: grid;
  gap: 40px;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 55%, var(--divider) 100%);
  opacity: .75;
}

.page-about .timeline::after {
  content: "NODE 2016 → 2024";
  position: absolute;
  right: 0;
  top: -22px;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--accent-2);
  letter-spacing: .06em;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 38px 32px;
}

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

.page-about .timeline__dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-card);
  box-shadow: 0 0 0 2px var(--accent), 0 0 14px var(--about-glow-green);
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}

.page-about .timeline__head {
  margin-bottom: 10px;
}

.page-about .timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .95rem;
  color: var(--accent);
  background: rgba(57, 255, 136, .08);
  border: 1px solid var(--divider);
  padding: 4px 10px;
  line-height: 1.4;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .timeline__body {
  border-left: 2px solid var(--divider);
  padding-left: 18px;
  transition: border-color .2s ease, background .2s ease;
}

.page-about .timeline__body h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  text-transform: uppercase;
  margin-bottom: 8px;
  color: var(--text);
}

.page-about .timeline__body p {
  color: var(--text-2);
  line-height: 1.8;
  font-size: .925rem;
  margin: 0;
}

.page-about .timeline__item:hover .timeline__dot,
.page-about .timeline__item:focus-within .timeline__dot {
  transform: scale(1.3);
  background: var(--accent-2);
  box-shadow: 0 0 0 2px var(--accent-2), 0 0 18px var(--about-glow-orange);
}

.page-about .timeline__item:hover .timeline__body,
.page-about .timeline__item:focus-within .timeline__body {
  border-left-color: var(--accent);
  background: linear-gradient(90deg, rgba(57, 255, 136, .06), transparent 72%);
}

.page-about .timeline__item:hover .timeline__year,
.page-about .timeline__item:focus-within .timeline__year {
  color: var(--accent-2);
  border-color: var(--accent-2);
  background: rgba(255, 107, 26, .08);
}

.page-about .about-journey__aside {
  align-self: start;
}

.page-about .about-journey__panel {
  margin: 0;
  border: 1px solid var(--divider);
  padding: 14px;
  background: var(--bg-elev);
  box-shadow: 8px 8px 0 rgba(57, 255, 136, .12);
}

.page-about .about-journey__panel img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-journey__panel figcaption {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--divider);
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--text-2);
  line-height: 1.6;
}

/* ---------- 团队与数据能力 ---------- */
.page-about .about-capability {
  padding: 64px 0;
}

.page-about .about-capability__layout {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-about .about-capability__visual {
  border: 1px solid var(--divider);
  padding: 20px;
  background: var(--bg-elev);
  box-shadow: 6px 6px 0 rgba(255, 107, 26, .16);
}

.page-about .about-capability__svg {
  display: block;
  width: 100%;
  height: auto;
  background: var(--bg-card);
}

.page-about .about-capability__svg text {
  font-family: var(--font-mono);
}

.page-about .about-capability__caption {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--divider);
  font-size: .85rem;
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .about-capability__content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-about .about-capability__lead {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text);
  margin: 0;
}

.page-about .about-capability__note {
  font-size: .9rem;
  line-height: 1.8;
  color: var(--text-2);
  margin: 0;
}

.page-about .data-panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--divider);
  border: 1px solid var(--divider);
}

.page-about .data-panel__item {
  background: var(--bg-card);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background .2s ease;
}

.page-about .data-panel__item:hover {
  background: var(--bg-elev);
}

.page-about .data-panel__num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--accent);
  line-height: 1;
  letter-spacing: .02em;
}

.page-about .data-panel__unit {
  font-size: 1rem;
  color: var(--accent-2);
  margin-left: 2px;
}

.page-about .data-panel__label {
  font-size: .85rem;
  color: var(--text-2);
  line-height: 1.5;
}

/* ---------- 我们的承诺 ---------- */
.page-about .about-commitment {
  padding: 64px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--divider);
}

.page-about .about-commitment__grid {
  display: grid;
  gap: 24px;
}

.page-about .commitment-card {
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--divider);
  border-top: 3px solid var(--accent);
  padding: 32px 28px 28px;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}

.page-about .commitment-card:nth-child(2) {
  border-top-color: var(--accent-2);
}

.page-about .commitment-card:nth-child(3) {
  border-top-color: var(--info);
}

.page-about .commitment-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 6px 6px 0 rgba(57, 255, 136, .14);
}

.page-about .commitment-card__index {
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: .875rem;
  color: var(--accent-2);
}

.page-about .commitment-card h3 {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  text-transform: uppercase;
  margin-bottom: 12px;
  color: var(--text);
}

.page-about .commitment-card p {
  font-size: .95rem;
  line-height: 1.8;
  color: var(--text-2);
  margin: 0;
}

.page-about .about-commitment__visual {
  margin: 48px 0 0;
  border: 1px solid var(--divider);
  padding: 14px;
  background: var(--bg-base);
  box-shadow: 8px 8px 0 rgba(57, 255, 136, .12);
}

.page-about .about-commitment__visual img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-commitment__cta {
  margin-top: 48px;
  border: 1px solid var(--divider);
  border-left: 4px solid var(--accent);
  background:
    linear-gradient(135deg, rgba(57, 255, 136, .08), transparent 50%),
    var(--bg-elev);
  padding: 32px 28px;
}

.page-about .about-commitment__cta-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  text-transform: uppercase;
  color: var(--text);
  margin: 0 0 8px;
}

.page-about .about-commitment__cta-desc {
  font-size: .925rem;
  line-height: 1.8;
  color: var(--text-2);
  margin: 0 0 20px;
}

/* ---------- 响应式：平板及以上 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 48px;
  }

  .page-about .about-mission__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 48px;
  }

  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 24px;
    align-items: start;
    padding-left: 32px;
  }

  .page-about .timeline__head {
    margin-bottom: 0;
  }

  .page-about .timeline__year {
    display: block;
    text-align: right;
    background: none;
    border: none;
    border-right: 2px solid var(--accent);
    padding: 4px 14px 4px 0;
  }

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

@media (min-width: 900px) {
  .page-about .about-journey__layout {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-capability__layout {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 56px;
  }

  .page-about .about-commitment__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .page-about .about-commitment__cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 36px 40px;
  }

  .page-about .about-commitment__cta-desc {
    margin-bottom: 0;
  }
}