.page-about {
  --about-hero-bg: #0A1F44;
  --about-hero-text: #F8F1E4;
  --about-line: rgba(10, 31, 68, 0.14);
  --about-node: #FF6B35;
  --about-node-cyan: #00C2D1;
  background: var(--color-bg);
  overflow-x: hidden;
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
  max-width: var(--container);
  margin: 0 auto;
  padding: 88px 24px 0;
  font-size: var(--fs-2);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.page-about .breadcrumb-link:hover {
  color: var(--color-accent);
}

.page-about .breadcrumb-current {
  color: var(--color-text);
  opacity: 0.65;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 48px 24px 72px;
  background: var(--about-hero-bg);
  color: var(--about-hero-text);
  overflow: hidden;
}

.page-about .about-hero-container {
  position: relative;
}

.page-about .about-hero-decoration {
  position: absolute;
  top: -18px;
  right: -10px;
  font-family: var(--font-data);
  font-size: clamp(72px, 14vw, 160px);
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 255, 255, 0.06);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  letter-spacing: -4px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero-content .section-kicker {
  color: var(--color-cyan);
}

.page-about .about-hero-content .page-title {
  margin: 16px 0 20px;
  color: var(--about-hero-text);
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-about .about-hero-content .lead {
  max-width: 720px;
  margin: 0 0 28px;
  color: rgba(248, 241, 228, 0.85);
  font-size: var(--fs-4);
  line-height: 1.7;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-actions .btn-outline {
  border-color: rgba(248, 241, 228, 0.6);
  color: var(--about-hero-text);
}

.page-about .about-hero-actions .btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: var(--about-hero-text);
}

.page-about .about-hero-data {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .about-hero-data-item {
  padding: 20px 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero-data-item .data-number {
  font-family: var(--font-data);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
}

.page-about .about-hero-data-label {
  font-size: var(--fs-2);
  color: rgba(248, 241, 228, 0.7);
  letter-spacing: 0.04em;
}

/* ===== 品牌起源 ===== */
.page-about .about-origin {
  padding-top: 72px;
}

.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 44px;
}

.page-about .about-origin-content p {
  margin: 0 0 20px;
  color: var(--color-text);
  font-size: var(--fs-3);
  line-height: 1.75;
}

.page-about .about-origin-facts {
  margin: 24px 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-origin-facts > div {
  padding: 16px 20px;
  background: var(--color-card);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
}

.page-about .about-origin-facts dt {
  font-family: var(--font-data);
  font-size: var(--fs-2);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.page-about .about-origin-facts dd {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.5;
  color: var(--color-text);
}

.page-about .about-origin-content .about-more {
  display: inline-block;
  font-weight: 600;
  color: var(--color-cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.page-about .about-origin-content .about-more:hover {
  border-bottom-color: var(--color-cyan);
}

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

/* ===== 引言 ===== */
.page-about .about-quote {
  margin: 0;
  padding: 56px 24px;
  background: var(--color-primary);
  color: var(--about-hero-text);
}

.page-about .about-quote .container {
  max-width: 900px;
}

.page-about .about-quote p {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--about-hero-text);
}

.page-about .about-quote cite {
  font-style: normal;
  font-size: var(--fs-2);
  color: var(--color-cyan);
  letter-spacing: 0.12em;
}

/* ===== 里程碑时间线 ===== */
.page-about .about-journey {
  padding-top: 72px;
}

.page-about .about-timeline {
  position: relative;
  margin-top: 48px;
  padding-left: 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-cyan));
  opacity: 0.4;
}

.page-about .about-milestone {
  position: relative;
  padding: 24px 0 32px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-milestone::after {
  content: "";
  position: absolute;
  left: -27px;
  top: 34px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.page-about .about-milestone:last-child::after {
  background: var(--color-cyan);
  box-shadow: 0 0 0 1px var(--color-cyan);
}

.page-about .about-milestone-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.page-about .about-milestone-year {
  font-family: var(--font-data);
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
  letter-spacing: -2px;
}

.page-about .about-milestone-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: var(--fs-5);
  font-weight: 700;
  color: var(--color-heading);
}

.page-about .about-milestone-body p {
  margin: 0;
  font-size: var(--fs-3);
  line-height: 1.75;
  color: var(--color-text);
}

.page-about .about-journey-figure {
  width: 100%;
  margin: 44px 0 0;
}

/* ===== 数据服务承诺 ===== */
.page-about .about-promise {
  background: var(--color-card);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 72px 24px;
}

.page-about .about-promise .container {
  max-width: var(--container);
  margin: 0 auto;
}

.page-about .about-promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 44px;
}

.page-about .about-promise-item {
  padding: 28px 24px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(10, 31, 68, 0.08);
  box-shadow: var(--shadow-sm);
}

.page-about .about-promise-item .data-number {
  display: block;
  font-family: var(--font-data);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.page-about .about-promise-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: var(--fs-4);
  font-weight: 700;
  color: var(--color-heading);
}

.page-about .about-promise-item p {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.7;
  color: var(--color-text);
}

.page-about .about-promise-note {
  margin-top: 32px;
  padding: 20px 24px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  color: var(--about-hero-text);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-promise-note p {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.7;
}

.page-about .about-promise-note .about-more {
  color: var(--color-cyan);
  font-weight: 600;
  text-decoration: none;
}

.page-about .about-promise-note .about-more:hover {
  text-decoration: underline;
}

.page-about .about-promise-figure {
  width: 100%;
  margin: 36px 0 0;
}

/* ===== 团队理念 ===== */
.page-about .about-team {
  padding: 72px 24px 96px;
  background: var(--color-bg);
}

.page-about .about-team .container {
  max-width: var(--container);
  margin: 0 auto;
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 44px;
}

.page-about .about-team-content p {
  margin: 0 0 20px;
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--color-text);
}

.page-about .about-team-cta {
  padding: 32px 28px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(10, 31, 68, 0.08);
  box-shadow: var(--shadow-md);
  align-self: start;
}

.page-about .about-team-cta h3 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: var(--fs-5);
  font-weight: 700;
  color: var(--color-heading);
}

.page-about .about-team-cta p {
  margin: 0 0 20px;
  font-size: var(--fs-2);
  line-height: 1.7;
  color: var(--color-text);
}

.page-about .about-team-cta .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 8px 8px 0;
}

/* ===== 表格响应式 ===== */
.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  display: block;
}

/* ===== 平板 768 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 64px 32px 96px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
    gap: 32px;
  }

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

  .page-about .about-hero-data-item {
    padding: 24px 18px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .about-origin-facts {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-about .about-promise-note {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .page-about .about-promise-note p {
    max-width: 780px;
  }

  .page-about .about-promise-note .about-more {
    white-space: nowrap;
  }

  .page-about .about-team-grid {
    grid-template-columns: 7fr 4fr;
  }

  .page-about .about-team-cta {
    position: sticky;
    top: 120px;
  }

  .page-about .about-milestone {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 32px;
  }

  .page-about .about-milestone-meta {
    margin-bottom: 0;
    text-align: right;
    align-items: flex-end;
  }

  .page-about .about-milestone-year {
    font-size: 64px;
  }
}

/* ===== 桌面 1024 ===== */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 72px 32px 112px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 3fr 2fr;
    align-items: center;
  }

  .page-about .about-hero-data {
    grid-template-columns: repeat(2, 1fr);
    grid-column: auto;
  }

  .page-about .about-hero-data-item .data-number {
    font-size: 38px;
  }

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

  .page-about .about-origin-facts {
    grid-template-columns: 1fr;
  }

  .page-about .about-milestone {
    grid-template-columns: 320px 1fr;
  }

  .page-about .about-promise {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
}

/* ===== 移动小屏兜底 ===== */
@media (max-width: 480px) {
  .page-about .about-hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .page-about .about-origin-facts > div {
    padding: 14px 16px;
  }

  .page-about .about-milestone-year {
    font-size: 44px;
  }

  .page-about .about-promise-item {
    padding: 22px 18px;
  }

  .page-about .about-team-cta .btn {
    width: 100%;
  }
}