/* About page — sibom-cn */

.about-page {
  background: var(--surface);
}

/* Hero */
.about-hero {
  position: relative;
  min-height: min(72vh, 640px);
  display: flex;
  align-items: flex-end;
  color: #fff;
  overflow: hidden;
  background: var(--ink);
}

.about-hero__media,
.about-hero__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-hero__media img {
  transform: scale(1.04);
  animation: aboutHeroZoom 18s var(--ease) forwards;
}

@keyframes aboutHeroZoom {
  from { transform: scale(1.08); }
  to { transform: scale(1); }
}

.about-hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(14, 18, 24, 0.82) 0%, rgba(14, 18, 24, 0.45) 48%, rgba(14, 18, 24, 0.25) 100%),
    linear-gradient(0deg, rgba(14, 18, 24, 0.75) 0%, transparent 55%);
  pointer-events: none;
}

.about-hero__inner {
  position: relative;
  z-index: 1;
  padding: 48px 0 72px;
  max-width: 760px;
  margin-left: max(20px, calc((100% - var(--container)) / 2 + 20px));
  margin-right: auto;
  animation: aboutRise 0.85s var(--ease) both;
}

@keyframes aboutRise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.about-hero .breadcrumb,
.about-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.72);
}

.about-hero .breadcrumb a:hover {
  color: #fff;
}

.about-hero__eyebrow {
  color: rgba(255, 200, 150, 0.95);
  margin-top: 20px;
}

.about-hero h1 {
  margin: 12px 0 16px;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: -0.02em;
  max-width: 12em;
}

.about-hero__lead {
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.88);
  max-width: 34em;
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn--ghost-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  color: #fff;
  background: transparent;
  font-weight: 600;
  transition: background 0.3s var(--ease), border-color 0.3s;
}

.btn--ghost-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

/* Story */
.about-story {
  padding: 88px 0;
  background: var(--surface);
}

.about-story__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.about-story__media {
  overflow: hidden;
  background: var(--surface-2);
  aspect-ratio: 5 / 4;
}

.about-story__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}

.about-story__media:hover img {
  transform: scale(1.04);
}

.about-story__text p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
  max-width: 36em;
}

.about-story__points {
  margin-top: 28px;
  display: grid;
  gap: 12px;
}

.about-story__points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-2);
}

.about-story__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--accent);
}

/* Strength */
.about-strength {
  padding: 72px 0 80px;
  background: var(--surface-2);
}

.about-strength__list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.about-strength__item {
  padding: 28px 24px 8px 0;
  border-right: 1px solid var(--line);
}

.about-strength__item:last-child {
  border-right: 0;
  padding-right: 0;
}

.about-strength__item:first-child {
  padding-left: 0;
}

.about-strength__item strong {
  display: block;
  margin-bottom: 10px;
  font-size: 17px;
  color: var(--ink);
}

.about-strength__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 22em;
}

/* Industries */
.about-industries {
  padding: 72px 0 80px;
  background: var(--surface);
}

.about-industries__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px 28px;
}

.about-industries__item {
  display: block;
  padding-top: 20px;
  border-top: 2px solid var(--ink);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.about-industries__item:hover {
  border-top-color: var(--accent);
}

.about-industries__item:hover h3 {
  color: var(--accent);
}

.about-industries__item h3 {
  margin: 0 0 10px;
  font-size: 18px;
  transition: color 0.25s var(--ease);
}

.about-industries__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* Gallery — 统一比例 */
.about-gallery {
  padding: 72px 0 56px;
  background: var(--surface-2);
}

.about-gallery__feature {
  position: relative;
  margin: 8px 0 28px;
  overflow: hidden;
  background: var(--ink-2);
  aspect-ratio: 2.2 / 1;
}

.about-gallery__feature img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.8s var(--ease);
}

.about-gallery__feature:hover img {
  transform: scale(1.03);
}

.about-gallery__feature figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 24px 22px;
  background: linear-gradient(0deg, rgba(14, 18, 24, 0.82), transparent);
  color: #fff;
  display: grid;
  gap: 6px;
}

.about-gallery__feature figcaption strong {
  font-size: 18px;
}

.about-gallery__feature figcaption span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
  max-width: 40em;
}

.about-gallery__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  align-items: stretch;
}

.about-gallery__grid figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.about-gallery__frame {
  position: relative;
  overflow: hidden;
  background: var(--surface-3);
  aspect-ratio: 4 / 3;
  width: 100%;
}

.about-gallery__frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.7s var(--ease);
}

.about-gallery__grid figure:hover .about-gallery__frame img {
  transform: scale(1.05);
}

.about-gallery__grid figcaption {
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
}

/* Process */
.about-process {
  padding: 72px 0 80px;
  background: var(--surface);
}

.about-process__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.about-process__list li {
  display: grid;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.about-process__num {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.about-process__list strong {
  display: block;
  margin-bottom: 8px;
  font-size: 17px;
}

.about-process__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* Product lines */
.about-lines {
  padding: 64px 0 80px;
  background: var(--surface-2);
}

.about-lines__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.about-lines__link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 28px 24px;
  background: var(--surface);
  transition: background 0.3s var(--ease), color 0.3s;
}

.about-lines__link:hover {
  background: var(--ink);
  color: #fff;
}

.about-lines__name {
  font-size: 18px;
  font-weight: 600;
}

.about-lines__meta {
  font-size: 13px;
  color: var(--muted);
}

.about-lines__link:hover .about-lines__meta {
  color: rgba(255, 255, 255, 0.7);
}

/* CMS */
.about-cms {
  padding: 72px 0 88px;
  background: var(--surface);
}

.about-cms__layout {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.about-cms__body {
  margin: 0 0 36px;
  max-width: none;
}

.about-cms__extra h3 {
  margin: 28px 0 12px;
  font-size: 20px;
}

.about-cms__extra ul {
  display: grid;
  gap: 12px;
  margin: 0 0 8px;
}

.about-cms__extra li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}

.about-cms__extra p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.about-cms__aside {
  display: grid;
  gap: 16px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.about-cms__card {
  padding: 28px 24px;
  background: var(--surface-2);
  border: 1px solid var(--line);
}

.about-cms__card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.about-cms__card > p {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--muted);
}

.about-cms__contact {
  display: grid;
  gap: 4px;
  margin: 0 0 12px;
  font-size: 14px;
}

.about-cms__contact span {
  color: var(--muted);
  font-size: 12px;
}

.about-cms__contact a {
  font-weight: 600;
  color: var(--ink);
  word-break: break-all;
}

.about-cms__btn {
  margin-top: 8px;
  width: 100%;
}

.about-cms__card--dark {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.about-cms__card--dark h3 {
  color: #fff;
}

.about-cms__card--dark ul {
  display: grid;
  gap: 10px;
}

.about-cms__card--dark li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}

.about-cms__card--dark li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  background: var(--accent);
}

/* CTA */
.about-cta {
  padding: 64px 0;
  background: var(--ink);
  color: #fff;
}

.about-cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 3vw, 32px);
}

.about-cta p {
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  max-width: 36em;
}

.about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  flex-shrink: 0;
}

/* Responsive */
@media (max-width: 1100px) {
  .about-strength__list {
    grid-template-columns: 1fr 1fr;
  }

  .about-strength__item:nth-child(2) {
    border-right: 0;
  }

  .about-strength__item:nth-child(1),
  .about-strength__item:nth-child(2) {
    border-bottom: 1px solid var(--line);
  }

  .about-gallery__grid,
  .about-industries__grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

  .about-cms__layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-cms__aside {
    position: static;
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .about-story__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-hero__inner {
    margin-left: 20px;
    margin-right: 20px;
    padding: 36px 0 56px;
  }

  .about-cta__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .about-gallery__feature {
    aspect-ratio: 16 / 9;
  }
}

@media (max-width: 640px) {
  .about-strength__list,
  .about-gallery__grid,
  .about-lines__grid,
  .about-industries__grid,
  .about-process__list,
  .about-cms__aside {
    grid-template-columns: 1fr;
  }

  .about-strength__item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 20px 0;
  }

  .about-strength__item:last-child {
    border-bottom: 0;
  }

  .about-hero {
    min-height: 70vh;
  }
}