/* ===== 品牌故事页 · about ===== */

.page-about {
  --about-orange-soft: rgba(255, 107, 44, 0.35);
  --about-hover-panel: rgba(255, 255, 255, 0.02);
  background: var(--color-blue);
  color: var(--color-white);
}

/* --- 面包屑 --- */
.page-about .breadcrumbs {
  padding-top: 24px;
  padding-bottom: 4px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--color-blue-gray);
}

.page-about .breadcrumbs-link {
  color: var(--color-silver);
  text-decoration: none;
  transition: color var(--ease-fast);
}

.page-about .breadcrumbs-link:hover {
  color: var(--color-orange);
}

.page-about .breadcrumbs-current {
  color: var(--color-orange);
}

/* --- 首屏 --- */
.page-about .about-hero {
  position: relative;
  padding: 48px 0 80px;
  border-bottom: 1px solid var(--border-faint);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 320px;
  height: 320px;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 10px,
    rgba(255, 107, 44, 0.06) 10px 11px
  );
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero-index {
  display: inline-block;
  width: max-content;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-orange);
  border: 1px solid var(--about-orange-soft);
  padding: 10px 16px;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .about-hero-heading h1 {
  font-family: var(--font-heading);
  font-size: clamp(36px, 8vw, 112px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--color-white);
  margin: 0 0 20px;
  text-wrap: balance;
}

.page-about .about-hero-heading p {
  font-family: var(--font-body);
  font-size: clamp(13px, 1.2vw, 15px);
  line-height: 1.8;
  color: var(--color-silver);
  max-width: 520px;
  margin: 0;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-hero-meta .tag {
  padding: 8px 14px;
  font-size: 13px;
}

/* --- 章节通用 --- */
.page-about .section-head {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-md);
  cursor: default;
}

.page-about .section-index {
  display: inline-block;
  flex: 0 0 auto;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-orange);
  border: 1px solid var(--about-orange-soft);
  padding: 6px 10px;
  margin-right: 16px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: background-color var(--ease-fast), color var(--ease-fast);
  vertical-align: middle;
}

.page-about .section-head:hover .section-index {
  background-color: var(--color-orange);
  color: var(--color-white);
}

.page-about .section-title {
  font-family: var(--font-heading);
  font-size: var(--size-heading);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-white);
  margin: 0;
}

/* --- 品牌宣言 --- */
.page-about .about-manifesto {
  padding: 0 0 80px;
}

.page-about .about-manifesto-grid {
  margin-top: var(--space-md);
}

.page-about .about-manifesto-grid .panel p,
.page-about .about-manifesto-grid .board p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-silver);
  margin: 0;
}

.page-about .about-manifesto-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: var(--space-md);
}

.page-about .about-manifesto-actions .btn-ghost {
  color: var(--color-silver);
}

/* --- 发展里程碑 --- */
.page-about .about-milestones {
  padding: 64px 0;
  background: linear-gradient(180deg, var(--color-blue-light) 0%, var(--color-blue) 100%);
  border-top: 1px solid var(--border-faint);
  border-bottom: 1px solid var(--border-faint);
}

.page-about .timeline {
  position: relative;
  margin-top: var(--space-lg);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(180deg, var(--color-orange), rgba(168, 178, 193, 0.2));
}

.page-about .timeline-item {
  position: relative;
  padding-left: 28px;
  padding-bottom: 40px;
}

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

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--color-orange);
  clip-path: polygon(0 0, calc(100% - 4px) 0, 100% 4px, 100% 100%, 0 100%);
  z-index: 1;
}

.page-about .timeline-node {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-orange);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.page-about .timeline-card {
  margin: 0;
  border-color: var(--border-faint);
  transition: border-color var(--ease-fast), background-color var(--ease-fast);
}

.page-about .timeline-item:hover .timeline-card {
  border-color: var(--about-orange-soft);
  background-color: var(--about-hover-panel);
}

.page-about .timeline-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin: 0 0 8px;
}

.page-about .timeline-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-silver);
  margin: 0;
}

.page-about .about-milestone-image {
  margin-top: var(--space-lg);
}

.page-about .image-shell img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-milestone-cta {
  margin-top: var(--space-md);
  font-family: var(--font-body);
  font-size: 14px;
  text-align: right;
  color: var(--color-silver);
}

.page-about .about-milestone-cta a {
  color: var(--color-orange);
  text-decoration: none;
  border-bottom: 1px solid var(--about-orange-soft);
  transition: border-color var(--ease-fast);
}

.page-about .about-milestone-cta a:hover {
  border-color: var(--color-orange);
}

/* --- 极简理念 --- */
.page-about .about-philosophy {
  padding: 64px 0;
}

.page-about .about-philosophy-grid {
  margin-top: var(--space-md);
}

.page-about .about-philosophy-text {
  margin: 0;
  border-color: var(--border-faint);
}

.page-about .about-philosophy-text p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-silver);
  margin: 0 0 16px;
}

.page-about .about-philosophy-text p:last-child {
  margin-bottom: 0;
}

.page-about .about-philosophy-image {
  margin-top: var(--space-md);
}

/* --- 全球服务规模 --- */
.page-about .about-scale {
  padding: 64px 0;
  background: var(--color-dark);
  border-top: 1px solid var(--border-faint);
}

.page-about .about-scale-grid {
  margin-top: var(--space-md);
}

.page-about .scale-stats {
  display: flex;
  flex-direction: column;
  margin-top: var(--space-md);
}

.page-about .stat-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-faint);
}

.page-about .stat-item:last-child {
  border-bottom: none;
}

.page-about .stat-num {
  font-family: var(--font-heading);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 800;
  line-height: 1;
  color: var(--color-orange);
  white-space: nowrap;
}

.page-about .stat-label {
  font-family: var(--font-body);
  font-size: 13px;
  text-align: right;
  color: var(--color-silver);
}

.page-about .about-scale-figure {
  margin-top: var(--space-md);
  margin-bottom: var(--space-md);
}

.page-about .about-scale-note {
  margin-top: var(--space-md);
}

.page-about .about-scale-note p {
  color: var(--color-silver);
}

/* --- 桌面端 --- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 96px 0 140px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 140px 1fr 240px;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-hero-heading p {
    max-width: 460px;
  }

  .page-about .about-hero-meta {
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-start;
  }

  .page-about .about-manifesto {
    padding: 0 0 120px;
  }

  .page-about .about-milestones,
  .page-about .about-philosophy,
  .page-about .about-scale {
    padding: 120px 0;
  }

  .page-about .timeline {
    margin-top: var(--space-xl);
    padding-left: 0;
  }

  .page-about .timeline::before {
    left: 164px;
  }

  .page-about .timeline-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    column-gap: 48px;
    align-items: start;
    padding-left: 0;
    padding-bottom: 48px;
  }

  .page-about .timeline-item::before {
    left: 164px;
    top: 8px;
    margin-left: -6px;
  }

  .page-about .timeline-node {
    margin-bottom: 0;
    padding-top: 2px;
    text-align: right;
  }

  .page-about .about-milestone-image {
    margin-top: var(--space-xl);
  }

  .page-about .about-philosophy-image {
    margin-top: 0;
  }

  .page-about .about-scale-grid {
    align-items: start;
  }

  .page-about .scale-stats {
    margin-top: 0;
  }

  .page-about .about-scale-figure {
    margin-top: 0;
  }
}