.page-about {
  --about-slant: 2.5rem;
  --about-muted: rgba(245, 242, 237, 0.72);
  background: var(--c-stone);
  color: var(--c-ink);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: clip;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

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

.page-about a {
  transition: color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition);
}

/* 面包屑 */
.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.8rem;
  padding-top: 1.1rem;
  padding-bottom: 0.2rem;
  font-size: var(--text-sm);
  color: var(--c-bg-dark);
}

.page-about .about-crumbs a {
  color: var(--c-primary);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.page-about .about-crumbs a:hover {
  border-color: var(--c-primary);
}

.page-about .about-crumbs [aria-current="page"] {
  font-weight: 600;
  color: var(--c-ink);
}

/* 首屏 Hero */
.page-about .about-hero {
  position: relative;
  margin-top: 0.6rem;
  padding: clamp(2.6rem, 7vw, 5rem) 0 clamp(2.8rem, 8vw, 5.5rem);
  background:
    linear-gradient(120deg, rgba(18, 23, 42, 0.94) 0%, rgba(42, 46, 69, 0.96) 55%, rgba(18, 23, 42, 0.98) 100%),
    radial-gradient(circle at 20% 20%, rgba(255, 77, 0, 0.24) 0%, transparent 42%);
  color: var(--c-white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-slant)), 0 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: -6%;
  width: 74%;
  height: 100%;
  background: linear-gradient(115deg, rgba(255, 77, 0, 0.18) 0%, rgba(255, 179, 0, 0.05) 60%, transparent 100%);
  transform: skewX(-12deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(245, 242, 237, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 242, 237, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.5), transparent 70%);
  pointer-events: none;
}

.page-about .hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .hero-tag {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  align-items: center;
  margin-bottom: 1.4rem;
}

.page-about .hero-tagline {
  font-size: var(--text-sm);
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--c-gold);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0 0 1.2rem;
  font-family: var(--font-head);
  font-size: clamp(2.3rem, 7vw, 4.6rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

.page-about .hero-lead {
  max-width: 46rem;
  margin: 0 0 2.2rem;
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.7;
  color: var(--about-muted);
}

.page-about .hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.4rem;
  padding-top: 1.4rem;
  border-top: 1px solid rgba(245, 242, 237, 0.18);
}

.page-about .hero-metric {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem;
}

.page-about .metric-num {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: var(--c-primary);
  line-height: 1;
}

.page-about .metric-unit {
  font-weight: 800;
  color: var(--c-gold);
  margin-left: -0.4rem;
}

.page-about .metric-label {
  width: 100%;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: rgba(245, 242, 237, 0.7);
}

/* 通用区头 */
.page-about .section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.75rem;
  font-size: var(--text-sm);
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--c-primary);
  text-transform: uppercase;
}

.page-about .section-kicker::before {
  content: "";
  display: block;
  width: 0.9em;
  height: 3px;
  background: var(--gradient-energy);
}

.page-about .section-head h2,
.page-about .qualification-main h2,
.page-about .culture-content h2,
.page-about .origin-content h2 {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: 0.01em;
}

.page-about .section-head .section-intro {
  max-width: 44rem;
  margin-bottom: 0;
  color: rgba(42, 46, 69, 0.75);
}

/* 品牌缘起 */
.page-about .about-origin {
  padding: var(--space-lg) 0;
}

.page-about .origin-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .origin-frame {
  width: 100%;
  max-height: 430px;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 1.8rem) 0, 100% 1.8rem, 100% 100%, 1.8rem 100%, 0 calc(100% - 1.8rem));
}

.page-about .origin-content p {
  margin: 0 0 1rem;
  max-width: 60ch;
}

/* 成长轨迹 */
.page-about .about-journey {
  background: var(--c-white);
  padding: var(--space-lg) 0;
}

.page-about .about-journey .container {
  max-width: 1100px;
}

.page-about .about-journey .section-head {
  margin-bottom: 2.5rem;
}

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

.page-about .timeline-item {
  position: relative;
  padding-left: 2.2rem;
  margin-bottom: var(--space-md);
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 0.55rem;
  top: 0.75rem;
  bottom: 0.35rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-primary), var(--c-gold));
}

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

.page-about .timeline-item:last-child::before {
  bottom: 50%;
}

.page-about .tl-dot {
  position: absolute;
  left: 0;
  top: 0.9rem;
  width: 1.1rem;
  height: 1.1rem;
  border: 3px solid var(--c-primary);
  background: var(--c-gold);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(255, 77, 0, 0.14);
  z-index: 1;
}

.page-about .tl-phase {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.22rem 0.85rem;
  background: var(--c-primary);
  color: var(--c-white);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.12em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 0.55rem) 100%, 0 100%);
}

.page-about .tl-card {
  background: var(--c-stone);
  padding: 1.25rem 1.4rem;
  border-left: 3px solid var(--c-primary);
  box-shadow: 0 10px 24px rgba(18, 23, 42, 0.08);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.page-about .tl-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 34px rgba(18, 23, 42, 0.12);
}

.page-about .tl-card h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-head);
  font-size: var(--text-lg);
  letter-spacing: 0.01em;
}

.page-about .tl-card p {
  margin: 0;
  color: rgba(42, 46, 69, 0.8);
  font-size: var(--text-md);
}

/* 数据能力 */
.page-about .about-capability {
  position: relative;
  padding: var(--space-lg) 0;
  background: linear-gradient(140deg, var(--c-bg-dark) 0%, var(--c-ink) 100%);
  color: var(--c-white);
  overflow: hidden;
}

.page-about .about-capability::before {
  content: "";
  position: absolute;
  top: 0;
  right: -15%;
  width: 60%;
  height: 100%;
  background: linear-gradient(115deg, rgba(255, 77, 0, 0.18), transparent 65%);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-about .about-capability .container {
  position: relative;
  z-index: 1;
}

.page-about .about-capability .section-kicker {
  color: var(--c-gold);
}

.page-about .about-capability .section-head h2 {
  color: var(--c-white);
}

.page-about .about-capability .section-intro {
  color: rgba(245, 242, 237, 0.72);
}

.page-about .capability-grid {
  display: grid;
  gap: 1.2rem;
  margin: 2rem 0 2.4rem;
}

.page-about .cap-card {
  position: relative;
  padding: 1.6rem 1.5rem 1.5rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-top: 3px solid var(--c-primary);
  outline: none;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.page-about .cap-card:hover,
.page-about .cap-card:focus-within {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 179, 0, 0.5);
  transform: translateY(-4px);
}

.page-about .cap-number {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  line-height: 1;
  color: var(--c-gold);
}

.page-about .cap-number span {
  font-size: 0.5em;
  color: var(--c-primary);
}

.page-about .cap-card h3 {
  margin: 0.8rem 0 0.6rem;
  font-family: var(--font-head);
  font-size: var(--text-lg);
  letter-spacing: 0.01em;
}

.page-about .cap-card p {
  margin: 0;
  color: rgba(245, 242, 237, 0.74);
  font-size: var(--text-md);
}

.page-about .cap-detail {
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px dashed rgba(245, 242, 237, 0.18);
  font-size: var(--text-sm);
}

.page-about .cap-media-wrap {
  display: grid;
  gap: 1.6rem;
  align-items: center;
  margin-top: 1rem;
}

.page-about .cap-media {
  width: 100%;
  height: 260px;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 1.4rem) 0, 100% 1.4rem, 100% 100%, 0 100%);
}

.page-about .cap-note h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-head);
  font-size: var(--text-lg);
  color: var(--c-gold);
}

.page-about .cap-note p {
  margin: 0;
  max-width: 60ch;
  color: rgba(245, 242, 237, 0.74);
}

@media (hover: hover) {
  .page-about .cap-detail {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    opacity: 0;
    overflow: hidden;
    transform: translateY(6px);
    transition: max-height 0.3s, opacity 0.25s, transform 0.25s, padding-top 0.25s;
  }

  .page-about .cap-card:hover .cap-detail,
  .page-about .cap-card:focus-within .cap-detail {
    max-height: 14rem;
    margin-top: 0.8rem;
    padding-top: 0.8rem;
    border-top: 1px dashed rgba(245, 242, 237, 0.18);
    opacity: 1;
    transform: translateY(0);
  }
}

/* 资质认证 */
.page-about .about-qualification {
  padding: var(--space-lg) 0;
}

.page-about .qualification-grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

.page-about .qualification-main {
  background: var(--c-white);
  padding: 2rem 1.4rem;
  border-left: 4px solid var(--c-primary);
  box-shadow: 0 14px 34px rgba(18, 23, 42, 0.08);
}

.page-about .qualification-main > p {
  max-width: 60ch;
  color: rgba(42, 46, 69, 0.8);
}

.page-about .qualification-list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .qualification-list li {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0.85rem;
  align-items: start;
}

.page-about .qual-icon {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  background: var(--c-ink);
  color: var(--c-gold);
  font-weight: 800;
  font-size: var(--text-xs);
  clip-path: polygon(0 0, calc(100% - 0.4rem) 0, 100% 0.4rem, 100% 100%, 0 100%);
}

.page-about .qualification-list strong {
  display: block;
  margin-bottom: 0.2rem;
  font-family: var(--font-head);
  font-size: 1.05rem;
}

.page-about .qualification-list p {
  margin: 0;
  color: rgba(42, 46, 69, 0.75);
  font-size: var(--text-sm);
}

.page-about .icp-num {
  color: var(--c-primary);
  font-size: 1.05em;
  font-weight: 800;
}

.page-about .qualification-aside {
  background: var(--c-ink);
  color: var(--c-white);
  padding: 1.8rem 1.5rem;
  border-top: 3px solid var(--c-gold);
}

.page-about .qualification-aside h3 {
  margin: 0 0 0.8rem;
  font-family: var(--font-head);
  font-size: var(--text-lg);
}

.page-about .qualification-aside p {
  margin: 0 0 1rem;
  color: rgba(245, 242, 237, 0.78);
  font-size: var(--text-sm);
}

.page-about .qualification-aside .btn {
  margin-top: 0.6rem;
}

/* 团队与文化 */
.page-about .about-culture {
  padding: var(--space-lg) 0;
  background: linear-gradient(120deg, rgba(233, 196, 106, 0.42), var(--c-stone) 60%);
}

.page-about .culture-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .culture-frame {
  width: 100%;
  height: 260px;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 1.5rem), 0 100%);
}

.page-about .culture-content p {
  margin: 0 0 0.9rem;
  max-width: 58ch;
  color: rgba(42, 46, 69, 0.84);
}

.page-about .culture-values {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.2rem;
}

.page-about .culture-values span {
  padding: 0.34rem 1rem;
  background: var(--c-white);
  border: 1px solid rgba(255, 77, 0, 0.35);
  color: var(--c-primary);
  font-weight: 700;
  font-size: var(--text-sm);
  clip-path: polygon(0 0, calc(100% - 0.5rem) 0, 100% 0.5rem, 100% 100%, 0 100%);
}

/* 延伸导航 */
.page-about .about-paths {
  padding: var(--space-lg) 0;
}

.page-about .about-paths > .section-kicker {
  margin-bottom: 1rem;
}

.page-about .paths-grid {
  display: grid;
  gap: 1.2rem;
}

.page-about .path-card {
  position: relative;
  display: block;
  padding: 1.5rem 1.5rem 1.4rem 1.8rem;
  background: var(--c-white);
  border-left: 3px solid var(--c-primary);
  text-decoration: none;
  color: var(--c-ink);
  box-shadow: 0 8px 20px rgba(18, 23, 42, 0.08);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.page-about .path-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 32px rgba(18, 23, 42, 0.13);
  border-left-color: var(--c-gold);
}

.page-about .path-index {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-head);
  font-size: var(--text-sm);
  color: var(--c-gold);
  letter-spacing: 0.05em;
}

.page-about .path-card strong {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-head);
  font-size: var(--text-lg);
}

.page-about .path-card span:last-child {
  color: rgba(42, 46, 69, 0.72);
  font-size: var(--text-sm);
}

/* 桌面端布局增强 */
@media (min-width: 860px) {
  .page-about .about-crumbs {
    padding-top: 1.6rem;
  }

  .page-about .origin-grid {
    grid-template-columns: 1fr 1.05fr;
  }

  .page-about .origin-frame {
    height: 460px;
  }

  .page-about .timeline-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 2.8rem minmax(0, 1fr);
    column-gap: 1.4rem;
    padding-left: 0;
    align-items: start;
  }

  .page-about .timeline-item::before {
    left: 50%;
    top: 1.1rem;
    bottom: 0.6rem;
    transform: translateX(-50%);
  }

  .page-about .tl-dot {
    left: 50%;
    top: 1.3rem;
    transform: translateX(-50%);
  }

  .page-about .timeline-item:nth-child(odd) .tl-phase {
    grid-column: 1;
    grid-row: 1;
    justify-self: end;
  }

  .page-about .timeline-item:nth-child(odd) .tl-card {
    grid-column: 1;
    grid-row: 2;
  }

  .page-about .timeline-item:nth-child(even) .tl-phase {
    grid-column: 3;
    grid-row: 1;
    justify-self: start;
  }

  .page-about .timeline-item:nth-child(even) .tl-card {
    grid-column: 3;
    grid-row: 2;
    text-align: left;
  }

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

  .page-about .cap-media-wrap {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .cap-media {
    height: 320px;
  }

  .page-about .qualification-grid {
    grid-template-columns: 1.6fr 1fr;
  }

  .page-about .culture-grid {
    grid-template-columns: 1fr 1.05fr;
  }

  .page-about .culture-frame {
    height: 340px;
  }

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