/* 首页 - 学在中国品牌介绍 + 四大入口 */
.lc-about {
  padding: 96px 0;
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  overflow: hidden;
}

.lc-about .la-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #4f46e5;
  background: #eef2ff;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.lc-about h2 {
  font-size: 40px;
  font-weight: 800;
  color: #0f172a;
  margin: 0 0 22px;
  line-height: 1.15;
  letter-spacing: -0.5px;
}

.lc-about .la-lead {
  font-size: 17px;
  color: #334155;
  line-height: 1.85;
  margin-bottom: 16px;
}

.lc-about .la-body {
  font-size: 15px;
  color: #475569;
  line-height: 1.85;
  margin-bottom: 24px;
}

.lc-about .la-checks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
}

.lc-about .la-checks li {
  position: relative;
  padding-left: 28px;
  font-size: 14px;
  font-weight: 600;
  color: #1e293b;
}

.lc-about .la-checks li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 1px;
  width: 20px;
  height: 20px;
  background: #4f46e5;
  border-radius: 50%;
}

.lc-about .la-checks li::after {
  content: '';
  position: absolute;
  left: 7px;
  top: 5px;
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.lc-video-card {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 28px 70px rgba(15, 23, 42, 0.16);
  background: #0B1A3A;
}

.lc-video-card video {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  display: block;
  object-fit: cover;
}

.lc-gateways {
  display: flex;
  flex-wrap: wrap;
  margin: 70px -12px 0;
}

.lc-gateways > [class*="col-"] {
  flex: 0 0 auto;
  width: 100%;
  padding-right: 12px;
  padding-left: 12px;
}

@media (min-width: 768px) {
  .lc-gateways > .col-md-6 { width: 50%; }
}

@media (min-width: 992px) {
  .lc-gateways > .col-lg-3 { width: 25%; }
}

.lc-gateway {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  padding: 30px;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: all .35s cubic-bezier(.25, .46, .45, .94);
  position: relative;
  overflow: hidden;
}

.lc-gateway::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #4f46e5, #8b5cf6);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}

.lc-gateway:hover {
  transform: translateY(-7px);
  box-shadow: 0 24px 56px rgba(15, 23, 42, 0.12);
  border-color: #c7d2fe;
}

.lc-gateway:hover::before {
  transform: scaleX(1);
}

.lc-gateway .la-ic {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: linear-gradient(135deg, #eef2ff, #f5f3ff);
  color: #4f46e5;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.lc-gateway .la-ic svg {
  width: 26px;
  height: 26px;
  stroke-width: 2;
}

.lc-gateway h3 {
  font-size: 18px;
  font-weight: 800;
  color: #0f172a;
  margin: 0 0 10px;
}

.lc-gateway p {
  font-size: 14px;
  color: #475569;
  line-height: 1.7;
  margin: 0 0 20px;
  flex: 1;
}

.lc-gateway .la-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: #4f46e5;
  text-decoration: none;
  transition: gap .2s ease;
}

.lc-gateway:hover .la-link {
  gap: 10px;
}

.lc-gateway .la-link::after {
  content: '→';
}

@media (max-width: 991px) {
  .lc-about {
    padding: 64px 0;
  }

  .lc-about h2 {
    font-size: 30px;
  }

  .lc-gateways {
    margin-top: 46px;
  }
}