.page-about {
  background: var(--c-bg);
  color: var(--c-text);
}

/* ============ 首屏：品牌简介 ============ */
.page-about .about-hero {
  position: relative;
  padding: 36px 0 88px;
  overflow: hidden;
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(1000px 460px at 85% -20%, rgba(0, 255, 136, 0.09), transparent 60%),
    radial-gradient(700px 420px at 0% 110%, rgba(0, 191, 255, 0.07), transparent 55%);
}

.page-about .about-hero::after {
  content: "V4";
  position: absolute;
  top: 40px;
  right: -3vw;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(9rem, 21vw, 24rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(255, 255, 255, 0.06);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.page-about .about-hero-swoosh {
  position: absolute;
  bottom: 16px;
  left: 0;
  width: min(520px, 62%);
  height: auto;
  z-index: 0;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 56px;
  align-items: center;
}

.page-about .about-hero-copy .section-tag {
  margin-bottom: 14px;
}

.page-about .page-title {
  font-size: clamp(44px, 7vw, 72px);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: 0.01em;
  margin: 0;
  background: linear-gradient(100deg, var(--c-text) 20%, var(--c-accent) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .page-lead {
  max-width: 620px;
  margin: 22px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-dim);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-hero-figure {
  position: relative;
  margin: 0;
  padding: 14px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: 14px 14px 0 rgba(0, 255, 136, 0.12);
  transform: rotate(1.4deg);
  transition: transform 0.3s var(--ease);
}

.page-about .about-hero-figure:hover {
  transform: rotate(0deg) translateY(-6px);
}

.page-about .about-hero-figure::before {
  content: attr(data-label);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  background: var(--c-accent);
  color: var(--c-bg);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 5px 12px;
  border-radius: 0 0 var(--radius) 0;
}

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

/* ============ 区块标题微调 ============ */
.page-about .section-head {
  max-width: 760px;
  margin-bottom: 44px;
}

.page-about .section-lead {
  margin-top: 12px;
  color: var(--c-dim);
  font-size: 15px;
  line-height: 1.8;
}

/* ============ 发展历程：垂直时间线 ============ */
.page-about .timeline-section {
  position: relative;
  padding: 96px 0 80px;
}

.page-about .about-timeline {
  position: relative;
  padding: 20px 0 8px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 24px;
  bottom: 24px;
  width: 3px;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, var(--c-accent), var(--c-blue));
  opacity: 0.3;
  border-radius: 99px;
}

.page-about .about-timeline::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -8px;
  width: 14px;
  height: 14px;
  transform: translateX(-50%) rotate(45deg);
  background: var(--c-bg);
  border: 3px solid var(--c-blue);
  box-shadow: 0 0 0 6px rgba(0, 191, 255, 0.12);
}

.page-about .about-timeline-item {
  position: relative;
  width: calc(50% - 56px);
  margin-bottom: 42px;
}

.page-about .about-timeline-item:nth-child(odd) {
  margin-right: auto;
}

.page-about .about-timeline-item:nth-child(even) {
  margin-left: auto;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  top: 36px;
  width: 14px;
  height: 14px;
  transform: rotate(45deg);
  background: var(--c-bg);
  border: 3px solid var(--c-accent);
  z-index: 2;
}

.page-about .about-timeline-item:nth-child(odd)::before {
  right: -49px;
}

.page-about .about-timeline-item:nth-child(even)::before {
  left: -49px;
}

.page-about .about-timeline-item:last-child::before {
  border-color: var(--c-blue);
  box-shadow: 0 0 0 6px rgba(0, 191, 255, 0.15);
}

.page-about .about-timeline-card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-accent);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow-card);
  position: relative;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-timeline-item:nth-child(even) .about-timeline-card {
  border-top-color: var(--c-blue);
}

.page-about .about-timeline-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.page-about .about-timeline-version {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 32px;
  line-height: 1;
  color: var(--c-accent);
  letter-spacing: 0.04em;
}

.page-about .about-timeline-item:nth-child(even) .about-timeline-version {
  color: var(--c-blue);
}

.page-about .about-timeline-title {
  font-family: var(--f-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 10px;
}

.page-about .about-timeline-copy {
  color: var(--c-dim);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

/* ============ 资质与荣誉 ============ */
.page-about .trust-section {
  padding: 96px 0;
  border-top: 1px solid var(--c-line);
  background:
    radial-gradient(800px 400px at 10% 20%, rgba(0, 191, 255, 0.05), transparent 60%),
    var(--c-bg);
}

.page-about .trust-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(0, 1.15fr);
  gap: 56px;
  align-items: center;
}

.page-about .trust-figure {
  position: relative;
  margin: 0;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: 16px 16px 0 rgba(0, 191, 255, 0.08);
}

.page-about .trust-figure::before {
  content: attr(data-label);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  background: var(--c-blue);
  color: var(--c-bg);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 5px 12px;
  border-radius: 0 0 var(--radius) 0;
}

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

.page-about .trust-content .section-head {
  margin-bottom: 28px;
}

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

.page-about .trust-list li {
  display: flex;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .trust-list li:first-child {
  border-top: 1px solid var(--c-line);
}

.page-about .trust-list-index {
  min-width: 48px;
  font-family: var(--f-display);
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
  color: var(--c-accent);
  opacity: 0.3;
}

.page-about .trust-item-title {
  display: block;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--c-text);
}

.page-about .trust-item-copy {
  margin: 0;
  color: var(--c-dim);
  font-size: 14px;
  line-height: 1.7;
}

/* ============ 数据能力 ============ */
.page-about .data-section {
  position: relative;
  padding: 96px 0;
  overflow: hidden;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(900px 400px at 90% 0%, rgba(0, 255, 136, 0.06), transparent 60%),
    radial-gradient(700px 400px at 0% 100%, rgba(0, 191, 255, 0.06), transparent 55%);
  background-color: var(--c-surface);
}

.page-about .data-section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

.page-about .data-section-head .section-lead {
  margin-top: 12px;
}

.page-about .data-console {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr) 240px;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 36px;
}

.page-about .data-console-column {
  display: grid;
  gap: 20px;
}

.page-about .data-console-panel {
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 150px;
  position: relative;
  overflow: hidden;
}

.page-about .data-console-panel::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), transparent 70%);
}

.page-about .data-console-panel:nth-child(2)::after {
  background: linear-gradient(90deg, var(--c-blue), transparent 70%);
}

.page-about .data-panel-label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-dim);
  font-weight: 600;
}

.page-about .data-panel-value {
  font-family: var(--f-display);
  font-size: 44px;
  font-weight: 900;
  line-height: 1;
  color: var(--c-accent);
  margin: 10px 0 4px;
}

.page-about .data-console-panel:nth-child(2) .data-panel-value {
  color: var(--c-blue);
}

.page-about .data-panel-unit {
  font-size: 12px;
  color: var(--c-dim);
  line-height: 1.5;
}

.page-about .about-data-screen {
  position: relative;
  margin: 0;
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  align-items: stretch;
  min-height: 100%;
}

.page-about .about-data-screen::before {
  content: attr(data-label);
  position: absolute;
  top: 0;
  right: 0;
  z-index: 2;
  background: var(--c-accent);
  color: var(--c-bg);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 5px 12px;
  border-radius: 0 0 0 var(--radius);
}

.page-about .about-data-screen img {
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
  display: block;
}

.page-about .data-note {
  max-width: 880px;
  margin: 0 auto;
  padding: 24px 28px;
  border-left: 4px solid var(--c-accent);
  background: var(--c-bg);
  color: var(--c-dim);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .data-note p {
  margin: 0;
}

/* ============ 收尾衔接 CTA ============ */
.page-about .about-cta {
  padding: 80px 0;
}

.page-about .about-cta-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-cta-inner .section-title {
  font-size: clamp(28px, 4vw, 42px);
  margin-top: 10px;
  margin-bottom: 12px;
}

.page-about .about-cta-copy {
  color: var(--c-dim);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 28px;
}

.page-about .about-cta .about-hero-actions {
  justify-content: center;
}

/* ============ 响应式 ============ */
@media (max-width: 1040px) {
  .page-about .data-console {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-data-screen {
    grid-column: 1 / -1;
    order: -1;
    min-height: 300px;
  }

  .page-about .about-data-screen img {
    min-height: 300px;
  }
}

@media (max-width: 900px) {
  .page-about .about-hero {
    padding-bottom: 72px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .page-about .about-hero-figure {
    max-width: 420px;
  }

  .page-about .trust-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .page-about .trust-figure {
    max-width: 100%;
  }

  .page-about .about-timeline::before {
    left: 12px;
    transform: none;
  }

  .page-about .about-timeline::after {
    left: 12px;
    transform: translateX(-50%) rotate(45deg);
  }

  .page-about .about-timeline-item,
  .page-about .about-timeline-item:nth-child(odd),
  .page-about .about-timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    padding-left: 40px;
  }

  .page-about .about-timeline-item::before,
  .page-about .about-timeline-item:nth-child(odd)::before,
  .page-about .about-timeline-item:nth-child(even)::before {
    left: 5px;
    right: auto;
  }
}

@media (max-width: 560px) {
  .page-about .about-hero-swoosh {
    width: 80%;
    opacity: 0.35;
  }

  .page-about .about-hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .about-hero-actions .btn {
    text-align: center;
  }

  .page-about .data-console {
    grid-template-columns: 1fr;
  }

  .page-about .data-console-column {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .page-about .data-console-panel {
    min-height: 120px;
    padding: 18px 16px;
  }

  .page-about .data-panel-value {
    font-size: 32px;
  }

  .page-about .about-data-screen {
    grid-column: auto;
    order: 0;
    min-height: 240px;
  }

  .page-about .about-data-screen img {
    min-height: 240px;
  }

  .page-about .about-timeline-card {
    padding: 22px 20px;
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  }

  .page-about .about-timeline-title {
    font-size: 21px;
  }

  .page-about .trust-list li {
    gap: 12px;
  }

  .page-about .trust-list-index {
    font-size: 32px;
    min-width: 36px;
  }
}