/* 移动端 · 创新原料（波格因） */

.m-by-hero {
  position: relative;
  min-height: 72svh;
  overflow: hidden;
  background: #111;
  color: #fff;
}

.m-by-hero-media {
  position: absolute;
  inset: 0;
}

.m-by-hero-media img,
.m-by-hero-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #111;
}
.m-by-hero-media:has(video.m-by-hero-video[aria-hidden="false"]) > img.m-by-hero-img {
  display: none !important;
}
.m-by-hero-media:has(img.m-by-hero-img[aria-hidden="false"]) > video.m-by-hero-video {
  display: none !important;
}

.m-by-hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.35) 0%, rgba(0,0,0,.15) 40%, rgba(0,0,0,.55) 100%);
  pointer-events: none;
}

.m-by-hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 72svh;
  padding: 88px 22px calc(36px + env(safe-area-inset-bottom, 0px));
  box-sizing: border-box;
}

.m-by-logo {
  width: min(46vw, 168px);
  height: auto;
  margin-bottom: 18px;
  /* 与 PC 一致：黑底素材在深色首屏显示为白色 */
  filter: brightness(0) invert(1);
}

.m-by-hero-copy h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .03em;
}

.m-by-hero-sub {
  margin: 14px 0 0;
  font-size: 13px;
  letter-spacing: .06em;
  opacity: .92;
}

.m-by-block {
  padding: 44px 20px;
  background: #fff;
}

.m-by-block.is-tint {
  background: #f7f5f1;
}

.m-by-block.is-dark {
  background: #141210;
  color: #f5f2ec;
}

.m-by-kicker {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: #caa009;
  text-transform: uppercase;
}

.m-by-block.is-dark .m-by-kicker {
  color: #e0c35a;
}

.m-by-title {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .03em;
  color: #1a1a1a;
}

.m-by-block.is-dark .m-by-title {
  color: #fff;
}

.m-by-sub {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: #666;
}

.m-by-block.is-dark .m-by-sub {
  color: rgba(255,255,255,.78);
}

.m-by-body {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: #444;
}

.m-by-block.is-dark .m-by-body {
  color: rgba(255,255,255,.82);
}

.m-by-body p {
  margin: 0 0 12px;
}

.m-by-body p:last-child {
  margin-bottom: 0;
}

/* 三代对比 */
.m-by-cmp {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 22px;
}

.m-by-cmp-card {
  padding: 18px 16px;
  background: #f0eeea;
  border-radius: 2px;
}

.m-by-cmp-card.is-accent {
  background: linear-gradient(135deg, #c9a227 0%, #a88412 100%);
  color: #fff;
}

.m-by-cmp-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}

.m-by-cmp-card p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: #555;
}

.m-by-cmp-card.is-accent p {
  color: rgba(255,255,255,.92);
}

/* 分子区 */
.m-by-molecule-viewer {
  width: 100%;
  height: 280px;
  margin-top: 8px;
  background: transparent;
}

.m-by-caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(255,255,255,.55);
  text-align: center;
}

/* 证据 / 沉积 / 蛋白组 */
.m-by-label {
  margin: 18px 0 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  color: #caa009;
}

.m-by-figure {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 20px;
}

.m-by-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 20px;
}

.m-by-pair img {
  display: block;
  width: 100%;
  height: auto;
}

/* 应用领域 */
.m-by-apply-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 24px;
}

.m-by-apply-card {
  overflow: hidden;
  background: #fff;
  border: 1px solid #eceae4;
}

.m-by-apply-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #f3f1ec;
}

.m-by-apply-body {
  padding: 16px 16px 18px;
}

.m-by-apply-body strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: #1a1a1a;
  line-height: 1.4;
}

.m-by-apply-body em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: 12px;
  letter-spacing: .04em;
  color: #caa009;
}

.m-by-apply-body span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: #555;
}

@media (min-width: 480px) {
  .m-by-pair {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: start;
  }
}