#section-3.section-3 {
  position: relative;
  display: block;
  width: 100%;
  min-height: auto;
  padding: clamp(80px, 8vw, 160px) clamp(20px, 5vw, 80px);
  overflow: hidden;
  background: #08111F;
  color: #FFFFFF;
  font-size: initial;
  font-weight: 400;
  line-height: normal;
  text-align: center;
  box-sizing: border-box;
}

#section-3::before,
#section-3::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -20%;
  bottom: -20%;
  left: -20%;
  pointer-events: none;
  filter: blur(80px);
  opacity: .65;
  z-index: 0;
}

#section-3::before {
  background: radial-gradient(circle at 30% 40%, rgba(56,189,248,.55) 0%, transparent 50%);
  animation: section-3-bg-1 22s ease-in-out infinite alternate;
  will-change: transform;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

#section-3::after {
  background: radial-gradient(circle at 70% 60%, rgba(91,208,251,.35) 0%, transparent 50%);
  animation: section-3-bg-2 28s ease-in-out infinite alternate;
  will-change: transform;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

@keyframes section-3-bg-1 {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }

  50% {
    transform: translate3d(6%, -4%, 0) scale(1.06);
  }

  100% {
    transform: translate3d(-4%, 5%, 0) scale(.96);
  }
}

@keyframes section-3-bg-2 {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }

  50% {
    transform: translate3d(-5%, 5%, 0) scale(1.08);
  }

  100% {
    transform: translate3d(4%, -3%, 0) scale(.95);
  }
}

.section-3 > * {
  position: relative;
  z-index: 1;
}

.section-3__bg-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  pointer-events: none;
}

.section-3__bg-mask {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(8,17,31,.55) 0%, rgba(8,17,31,.7) 100%);
}

.section-3 h2,
.section-3 h3,
.section-3 p {
  margin: 0;
}

.section-3__inner {
  position: relative;
  z-index: 1;
  width: 100%;
}

.section-3__head {
  position: relative;
  z-index: 1;
  text-align: center;
  margin-bottom: clamp(48px, 5vw, 96px);
}

.section-3__title {
  color: #FFFFFF;
  font-size: clamp(32px, 3.8vw, 64px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0;
  margin: 0 0 clamp(12px, 1vw, 20px);
}

.section-3 .section-3__subtitle,
.section-3 .section-3__lead {
  color: rgba(255,255,255,.75);
  font-size: clamp(15px, 1.1vw, 22px);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0;
  margin: 0;
}

.section-3__top-cards {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(16px, 1.6vw, 32px);
  flex-wrap: nowrap;
  max-width: 1280px;
  min-height: clamp(220px, 22vw, 320px);
  padding: clamp(40px, 5vw, 80px) clamp(20px, 3vw, 40px);
  margin: 0 auto clamp(80px, 8vw, 140px);
}

.section-3__top-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(8px, .8vw, 14px);
  width: clamp(96px, 10vw, 160px);
  aspect-ratio: 1;
  padding: clamp(14px, 1.4vw, 22px);
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: clamp(14px, 1.2vw, 22px);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition:
    transform .55s var(--ease),
    background .55s var(--ease),
    border-color .55s var(--ease),
    box-shadow .55s var(--ease);
  flex-shrink: 0;
  will-change: transform;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.section-3__top-card:nth-child(1) {
  transform: translate3d(0, 20px, 0);
}

.section-3__top-card:nth-child(2) {
  transform: translate3d(0, -24px, 0);
}

.section-3__top-card:nth-child(3) {
  transform: translate3d(0, 8px, 0);
}

.section-3__top-card:nth-child(4) {
  transform: translate3d(0, -32px, 0) scale(1.08);
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.14);
}

.section-3__top-card:nth-child(5) {
  transform: translate3d(0, 8px, 0);
}

.section-3__top-card:nth-child(6) {
  transform: translate3d(0, -24px, 0);
}

.section-3__top-card:nth-child(7) {
  transform: translate3d(0, 20px, 0);
}

.section-3__top-cards.is-in .section-3__top-card:nth-child(1) {
  transform: translate3d(0, 20px, 0);
}

.section-3__top-cards.is-in .section-3__top-card:nth-child(2) {
  transform: translate3d(0, -24px, 0);
}

.section-3__top-cards.is-in .section-3__top-card:nth-child(3) {
  transform: translate3d(0, 8px, 0);
}

.section-3__top-cards.is-in .section-3__top-card:nth-child(4) {
  transform: translate3d(0, -32px, 0) scale(1.08);
}

.section-3__top-cards.is-in .section-3__top-card:nth-child(5) {
  transform: translate3d(0, 8px, 0);
}

.section-3__top-cards.is-in .section-3__top-card:nth-child(6) {
  transform: translate3d(0, -24px, 0);
}

.section-3__top-cards.is-in .section-3__top-card:nth-child(7) {
  transform: translate3d(0, 20px, 0);
}

@media (hover: hover) {
  .section-3__top-card:hover {
    background: rgba(255,255,255,.1);
    border-color: rgba(56,189,248,.35);
    box-shadow: 0 12px 32px rgba(56,189,248,.15);
  }

  .section-3__top-cards.is-in .section-3__top-card:hover {
    background: rgba(255,255,255,.1);
    border-color: rgba(56,189,248,.35);
    box-shadow: 0 12px 32px rgba(56,189,248,.15);
  }

  .section-3__top-card:nth-child(1):hover {
    transform: translate3d(0, 14px, 0);
  }

  .section-3__top-cards.is-in .section-3__top-card:nth-child(1):hover {
    transform: translate3d(0, 14px, 0);
  }

  .section-3__top-card:nth-child(2):hover {
    transform: translate3d(0, -30px, 0);
  }

  .section-3__top-cards.is-in .section-3__top-card:nth-child(2):hover {
    transform: translate3d(0, -30px, 0);
  }

  .section-3__top-card:nth-child(3):hover {
    transform: translate3d(0, 2px, 0);
  }

  .section-3__top-cards.is-in .section-3__top-card:nth-child(3):hover {
    transform: translate3d(0, 2px, 0);
  }

  .section-3__top-card:nth-child(4):hover {
    transform: translate3d(0, -38px, 0) scale(1.08);
  }

  .section-3__top-cards.is-in .section-3__top-card:nth-child(4):hover {
    transform: translate3d(0, -38px, 0) scale(1.08);
  }

  .section-3__top-card:nth-child(5):hover {
    transform: translate3d(0, 2px, 0);
  }

  .section-3__top-cards.is-in .section-3__top-card:nth-child(5):hover {
    transform: translate3d(0, 2px, 0);
  }

  .section-3__top-card:nth-child(6):hover {
    transform: translate3d(0, -30px, 0);
  }

  .section-3__top-cards.is-in .section-3__top-card:nth-child(6):hover {
    transform: translate3d(0, -30px, 0);
  }

  .section-3__top-card:nth-child(7):hover {
    transform: translate3d(0, 14px, 0);
  }

  .section-3__top-cards.is-in .section-3__top-card:nth-child(7):hover {
    transform: translate3d(0, 14px, 0);
  }
}

@supports not ((backdrop-filter: blur(12px)) or (-webkit-backdrop-filter: blur(12px))) {
  .section-3__top-card {
    background: rgba(255,255,255,.12);
  }
}

.section-3__top-card-logo {
  flex-shrink: 0;
  width: clamp(44px, 4vw, 72px);
  height: clamp(44px, 4vw, 72px);
  display: block;
  object-fit: contain;
}

.section-3__top-card-name {
  color: rgba(255,255,255,.85);
  font-size: clamp(12px, .9vw, 16px);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0;
  white-space: nowrap;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.section-3__client-wall-head {
  position: relative;
  z-index: 1;
  text-align: center;
  margin-bottom: clamp(40px, 4vw, 72px);
}

.section-3__subhead {
  color: #FFFFFF;
  font-size: clamp(20px, 1.8vw, 32px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: .02em;
  margin: 0;
}

.section-3__client-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(12px, 1vw, 20px);
  max-width: min(1280px, 92vw);
  margin: 0 auto;
}

.section-3__client-card {
  width: 100%;
  height: clamp(60px, 5vw, 88px);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: clamp(8px, .8vw, 14px);
  padding: clamp(12px, 1vw, 20px);
  transition: background-color .35s var(--ease), border-color .35s var(--ease), transform .3s var(--ease);
}

@media (hover: hover) {
  .section-3__client-card:hover {
    background: rgba(255,255,255,.1);
    border-color: rgba(255,255,255,.2);
    transform: scale(1.05);
  }
}

.section-3__client-card img {
  max-width: 80%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

@media (max-width: 1023px) {
  #section-3.section-3 {
    padding: clamp(60px, 14vw, 96px) clamp(16px, 5vw, 28px);
  }

  .section-3__title {
    font-size: clamp(26px, 7vw, 36px);
  }

  .section-3 .section-3__subtitle,
  .section-3 .section-3__lead {
    font-size: clamp(13px, 3.6vw, 17px);
  }

  .section-3__top-cards {
    max-width: 100%;
    min-height: clamp(180px, 26vw, 260px);
    padding: clamp(32px, 6vw, 56px) clamp(8px, 2vw, 20px);
    gap: clamp(8px, 1.4vw, 16px);
    margin-bottom: clamp(60px, 12vw, 96px);
  }

  .section-3__top-card {
    width: clamp(72px, 10vw, 120px);
    padding: clamp(12px, 2vw, 18px);
  }

  .section-3__top-card-logo {
    width: clamp(36px, 5vw, 54px);
    height: clamp(36px, 5vw, 54px);
  }

  .section-3__top-card-name {
    font-size: clamp(11px, 1.5vw, 14px);
  }

  .section-3__subhead {
    font-size: clamp(16px, 4.4vw, 22px);
  }

  .section-3__client-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(8px, 2vw, 14px);
  }

  .section-3__client-card {
    height: clamp(48px, 12vw, 70px);
  }
}

@media (max-width: 767px) {
  .section-3__top-cards {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    min-height: auto;
    padding: 32px 16px;
  }

  .section-3__top-card {
    width: calc(33.333% - 8px);
    aspect-ratio: 1;
  }

  .section-3__top-card:nth-child(n) {
    transform: translate3d(0, 0, 0);
  }

  .section-3__top-cards.is-in .section-3__top-card:nth-child(n) {
    transform: translate3d(0, 0, 0);
  }

  .section-3__top-card:active {
    transform: translate3d(0, 0, 0) scale(1.04);
  }

  .section-3__top-cards.is-in .section-3__top-card:active {
    transform: translate3d(0, 0, 0) scale(1.04);
  }

  .section-3__client-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  #section-3::before,
  #section-3::after {
    animation: none;
  }

  .section-3__top-card,
  .section-3__client-card {
    transition: none !important;
  }
}

/* =============================================================
   跑马灯（无限轮播）— 取代原 top-cards 栅格
   ============================================================= */
.section-3__marquee {
  position: relative;
  z-index: 1;
  overflow: hidden;
  width: 100%;
  max-width: 1480px;
  margin: 0 auto clamp(80px, 8vw, 140px);
  padding: clamp(20px, 2vw, 36px) 0;
  /* 两端羽化 */
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 6%, #000 94%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 6%, #000 94%, transparent 100%);
}
.section-3__marquee-track {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.2vw, 44px);
  width: max-content;
  animation: section-3-marquee 30s linear infinite;
  will-change: transform;
}
.section-3__marquee:hover .section-3__marquee-track {
  animation-play-state: paused;
}
@keyframes section-3-marquee {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-50%, 0, 0); }
}
/* 跑马灯里的卡片样式微调（覆盖原 top-card） */
.section-3__marquee .section-3__top-card {
  flex: 0 0 auto;
  width: clamp(110px, 9.5vw, 150px);
  opacity: 1 !important;
  transform: none !important;
  transition: transform .3s ease;
}
.section-3__marquee .section-3__top-card:hover {
  transform: translateY(-4px) !important;
}
@media (prefers-reduced-motion: reduce) {
  .section-3__marquee-track { animation: none; }
}

/* =============================================================
   展现我们的优势
   ============================================================= */
.section-3__advantages-head {
  margin: 0 auto clamp(36px, 3vw, 56px);
}
.section-3__advantages {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(18px, 1.6vw, 28px);
}
/* 仅保留布局/排版：玻璃外观（border/background/backdrop-filter/shadow）由 .lg-card 组件 + liquid-glass-site.css 接管 */
.section-3__advantage {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: clamp(12px, 1.1vw, 18px);
  padding: clamp(24px, 2vw, 36px) clamp(20px, 1.8vw, 28px);
  border-radius: clamp(14px, 1.2vw, 20px);
  text-align: left;
  transition: transform .4s ease;
}
.section-3__advantage:hover {
  transform: translateY(-6px);
}
.section-3__advantage-icon {
  width: clamp(44px, 3.6vw, 60px);
  height: clamp(44px, 3.6vw, 60px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(140deg, rgba(120, 170, 255, 0.4), rgba(80, 110, 220, 0.18));
  color: #cfe2ff;
  flex-shrink: 0;
}
.section-3__advantage-icon svg {
  width: 55%;
  height: 55%;
}
.section-3__advantage-title {
  margin: 0;
  color: #f1f5f9;
  font-size: clamp(16px, 1.25vw, 22px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0;
}
.section-3__advantage-desc {
  margin: 0;
  color: rgba(241,245,249,.72);
  font-size: clamp(13px, .95vw, 16px);
  font-weight: 400;
  line-height: 1.55;
}
@media (max-width: 1023px) {
  .section-3__advantages { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .section-3__advantages { grid-template-columns: 1fr; }
}