/* 品牌概况页 —— 数据面板、时间线与资质矩阵 */
.page-about {
  --about-panel: rgba(16, 27, 51, 0.64);
  --about-line: rgba(192, 192, 192, 0.16);
  --about-glow-o: rgba(255, 107, 53, 0.18);
  --about-glow-c: rgba(0, 212, 255, 0.12);
  padding-top: calc(var(--header-height) + 36px);
  padding-bottom: 72px;
  color: var(--text-primary);
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-about > section {
  margin-bottom: 96px;
}

.page-about > section:last-child {
  margin-bottom: 0;
}

.page-about .crumb-list {
  position: relative;
  z-index: 1;
  max-width: var(--container-width);
  margin: 0 auto 64px;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.page-about .crumb-list a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .crumb-list a:hover,
.page-about .crumb-list a:focus-visible {
  color: var(--accent);
  outline: none;
}

.page-about .crumb-sep {
  margin: 0 8px;
  color: var(--silver);
}

.page-about .crumb-current {
  color: var(--text-primary);
}

/* 品牌使命 */
.page-about .about-mission__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.page-about .about-mission__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--accent);
  text-transform: uppercase;
}

.page-about .about-mission__kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--accent);
}

.page-about .about-mission__title {
  margin: 16px 0 20px;
  font-family: var(--font-headline);
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-about .about-mission__lead {
  max-width: 60ch;
  margin: 0;
  padding-left: 18px;
  border-left: 3px solid var(--accent);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .about-mission__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

.page-about .about-mission__visual::before {
  content: "";
  position: absolute;
  inset: 16px -16px -16px 16px;
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: var(--radius-lg);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-mission__visual::after {
  content: "";
  position: absolute;
  top: 20px;
  right: 20px;
  width: 90px;
  height: 90px;
  background: radial-gradient(circle, var(--about-glow-o), transparent 70%);
  z-index: 1;
  pointer-events: none;
}

.page-about .about-mission__img {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: var(--border-line);
  box-shadow: var(--shadow-card);
}

.page-about .about-mission__badge {
  position: absolute;
  z-index: 3;
  left: 12px;
  bottom: 16px;
  display: flex;
  flex-direction: column;
  padding: 14px 18px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 12px 30px rgba(255, 107, 53, 0.35);
}

.page-about .about-mission__badge-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-mission__badge-label {
  font-size: 12px;
  color: rgba(10, 31, 68, 0.85);
}

/* 关键数据条 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 64px;
  background: var(--about-line);
  border: var(--border-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--bg-secondary);
  padding: 22px 18px;
}

.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* 数据来源与核验流程 */
.page-about .about-sources__intro {
  max-width: 720px;
  margin: 20px 0 40px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .about-sources__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: stretch;
}

.page-about .about-flow {
  display: grid;
  align-content: start;
  gap: 22px;
}

.page-about .about-flow__step {
  position: relative;
  padding: 26px 24px 24px;
  background: var(--about-panel);
  border: var(--border-line);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-flow__step:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 107, 53, 0.45);
}

.page-about .about-flow__step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 34px;
  bottom: -20px;
  width: 1px;
  height: 20px;
  background: linear-gradient(to bottom, var(--data-cyan), transparent);
}

.page-about .about-flow__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--data-cyan);
}

.page-about .about-flow__step h3 {
  margin: 8px 0 10px;
  font-family: var(--font-headline);
  font-size: 20px;
  color: var(--text-primary);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

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

.page-about .about-sources__visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: var(--border-line);
  box-shadow: var(--shadow-card);
}

.page-about .about-sources__meta {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}

.page-about .about-sources__statement {
  margin-top: 40px;
  padding: 18px 22px;
  border-left: 3px solid var(--data-cyan);
  background: linear-gradient(90deg, rgba(0, 212, 255, 0.08), transparent);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
}

/* 发展历程时间线 */
.page-about .about-timeline__rail {
  position: relative;
  margin-top: 40px;
  padding-left: 30px;
}

.page-about .about-timeline__rail::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--data-cyan));
  opacity: 0.7;
}

.page-about .about-timeline__node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 24px;
  padding: 26px 22px 24px;
  background: var(--about-panel);
  border: var(--border-line);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-timeline__node:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 32px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.18);
}

.page-about .about-timeline__node:nth-child(even)::before {
  background: var(--data-cyan);
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.18);
}

.page-about .about-timeline__phase {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--data-cyan);
}

.page-about .about-timeline__meta h3 {
  margin: 8px 0 10px;
  font-family: var(--font-headline);
  font-size: 22px;
  color: var(--text-primary);
}

.page-about .about-timeline__meta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-about .about-timeline__metric {
  flex-shrink: 0;
  min-width: 160px;
  padding-top: 14px;
  border-top: 1px dashed var(--about-line);
}

.page-about .about-timeline__metric strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}

.page-about .about-timeline__metric span {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* 团队与资质 */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-team__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-team__card {
  padding: 26px 24px 24px;
  background: var(--about-panel);
  border: var(--border-line);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-team__card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 107, 53, 0.4);
}

.page-about .about-team__icon {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.16), rgba(0, 212, 255, 0.1));
  color: var(--accent);
}

.page-about .about-team__icon svg {
  width: 24px;
  height: 24px;
}

.page-about .about-team__card:nth-child(2) .about-team__icon,
.page-about .about-team__card:nth-child(4) .about-team__icon {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.16), rgba(255, 107, 53, 0.08));
  color: var(--data-cyan);
}

.page-about .about-team__card h3 {
  margin: 16px 0 8px;
  font-family: var(--font-headline);
  font-size: 18px;
  color: var(--text-primary);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}

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

.page-about .about-team__visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: var(--border-line);
  box-shadow: var(--shadow-card);
}

.page-about .about-team__note {
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(10, 31, 68, 0.5);
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.page-about .about-team__note p {
  margin: 0;
}

.page-about .about-team__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 48px;
}

/* 桌面端调整 */
@media (min-width: 768px) {
  .page-about .about-mission__badge {
    left: -22px;
    bottom: 32px;
  }

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

  .page-about .about-stat {
    padding: 26px 22px;
  }

  .page-about .about-timeline__rail {
    padding-left: 44px;
  }

  .page-about .about-timeline__rail::before {
    left: 12px;
  }

  .page-about .about-timeline__node {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    gap: 24px;
  }

  .page-about .about-timeline__node::before {
    left: -39px;
    width: 12px;
    height: 12px;
  }

  .page-about .about-timeline__metric {
    padding-top: 0;
    padding-left: 20px;
    border-top: none;
    border-left: 1px dashed var(--about-line);
    text-align: right;
  }
}

@media (min-width: 900px) {
  .page-about .about-mission__inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
  }
}

@media (min-width: 960px) {
  .page-about .about-sources__grid {
    grid-template-columns: 1.02fr 0.98fr;
    gap: 48px;
  }

  .page-about .about-sources__visual {
    align-self: center;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

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

  .page-about .about-team__visual {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
  }
}