/* ==================== 核心功能 ==================== */
.core {
  background: #FFFFFF;
}

.core-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

.core-item {
  background: var(--bg-card, #FFFFFF);
  padding: 30px 20px;
  border-radius: 12px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--border-color, #E5E6EB);
}

.core-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 82, 217, 0.15);
}

.core-icon {
  width: 90px;
  height: 90px;
  margin: 0 auto 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #FFFFFF;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.core-icon img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.core-title {
  font-size: 17px;
  font-weight: 600;
  color: #222;
  margin-bottom: 10px;
}

.core-desc {
  font-size: 14px;
  color: #4E5969;
  line-height: 1.6;
}

/* ==================== 数字化价值体现 ==================== */
.values {
  background: var(--bg-card, #FFFFFF);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.values-item {
  background: #FFFFFF;
  padding: 30px 25px;
  border-radius: 16px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--border-color, #E5E6EB);
  position: relative;
  overflow: hidden;
}

.values-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--blue-gradient);
  opacity: 0;
  transition: opacity 0.3s;
}

.values-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 82, 217, 0.15);
  border-color: var(--gold, #0052D9);
}

.values-item:hover::before {
  opacity: 1;
}

.values-icon-wrapper {
  width: 80px;
  height: 80px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card, #FFFFFF);
  border-radius: 50%;
  padding: 15px;
  transition: background 0.3s, transform 0.3s;
}

.values-item:hover .values-icon-wrapper {
  background: var(--gold, #0052D9);
  transform: scale(1.05);
}

.values-item:hover .values-icon-wrapper img {
  filter: brightness(0) invert(1);
}

.values-icon-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: filter 0.3s;
}

.values-label-tag {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  padding: 6px 20px;
  border-radius: 20px;
  margin-bottom: 15px;
  background: var(--gold, #0052D9);
  color: #fff;
}

.values-item-company .values-label-tag {
  background: linear-gradient(135deg, #0088d4 0%, #0052D9 100%);
}

.values-item-student .values-label-tag {
  background: linear-gradient(135deg, #3D7BFF 0%, #00c4f5 100%);
}

.values-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 15px;
  color: #222;
}

.values-item-company .values-title,
.values-item-student .values-title {
  color: var(--gold, #0052D9);
  font-size: 20px;
}

.values-list {
  font-size: 14px;
  color: #4E5969;
  line-height: 1.8;
  text-align: left;
  padding-left: 10px;
}

.values-list div {
  margin-bottom: 8px;
  padding-left: 12px;
  border-left: 2px solid var(--gold, #0052D9);
  transition: border-color 0.3s, padding-left 0.3s;
}

.values-item:hover .values-list div {
  padding-left: 15px;
}

.values-item-company .values-list div,
.values-item-student .values-list div {
  border-left-color: var(--gold, #0052D9);
}

.values-item-company .values-icon-wrapper,
.values-item-student .values-icon-wrapper {
  background: linear-gradient(135deg, var(--bg-card, #FFFFFF) 0%, #fff 100%);
}

/* ==================== 教培行业全覆盖 ==================== */
.cover {
  background: #FFFFFF;
}

.cover-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 15px;
  margin-bottom: 50px;
}

.cover-item {
  background: var(--border-color, #E5E6EB);
  color: var(--gold, #0052D9);
  padding: 20px 10px;
  border-radius: 10px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 2px solid transparent;
}

.cover-item:hover {
  transform: translateY(-3px);
  border-color: var(--gold, #0052D9);
  box-shadow: 0 5px 15px rgba(0, 82, 217, 0.2);
}

.cover-section {
  margin-bottom: 40px;
}

.cover-section-title {
  background: var(--gold, #0052D9);
  color: #fff;
  padding: 15px;
  font-size: 20px;
  text-align: center;
  border-radius: 12px 12px 0 0;
  margin-bottom: 0;
}

.cover-pc-images {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  background: #FFFFFF;
  padding: 20px;
  border-radius: 0 0 12px 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.pc-image-wrapper {
  overflow: hidden;
  border-radius: 8px;
  background: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.pc-image-wrapper img {
  max-width: 100%;
  max-height: 300px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

/* 小程序端布局 */
.cover-weapp-layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: center;
  background: #FFFFFF;
  padding: 25px;
  border-radius: 0 0 12px 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.action-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.action-item {
  padding: 15px;
  background: #FFFFFF;
  border-radius: 10px;
  border: 1px solid var(--border-color, #E5E6EB);
  border-left: 3px solid var(--gold, #0052D9);
}

.action-name {
  font-size: 16px;
  font-weight: 600;
  color: #222;
  margin-bottom: 8px;
}

.action-desc {
  font-size: 14px;
  color: #4E5969;
  line-height: 1.6;
}

.weapp-image-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.weapp-image-wrapper img {
  max-height: 350px;
  width: auto;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* ==================== 经典案例 ==================== */
.case-section {
  background: var(--bg-card, #FFFFFF);
  padding-bottom: 0;
}

.case-section .section-header {
  padding-top: 20px;
}

.case-wrapper {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 25px;
  margin-bottom: 30px;
}

.case-platform {
  background: #FFFFFF;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.platform-label {
  background: var(--gold, #0052D9);
  color: #fff;
  padding: 12px 20px;
  font-size: 16px;
  font-weight: 500;
}

.platform-image {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  background: #FFFFFF;
}

.platform-image img {
  max-width: 100%;
  max-height: 280px;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
}

.case-desc {
  background: #FFFFFF;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  border: 2px solid var(--gold, #0052D9);
}

.case-desc p {
  color: #4E5969;
  line-height: 1.8;
  font-size: 14px;
  margin-bottom: 15px;
}

.case-desc p:last-child {
  margin-bottom: 0;
}

.case-desc strong {
  color: var(--gold, #0052D9);
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
  .core-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .values-item {
    padding: 25px 20px;
  }

  .values-icon-wrapper {
    width: 70px;
    height: 70px;
  }

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

  .cover-pc-images {
    grid-template-columns: 1fr;
  }

  .cover-weapp-layout {
    grid-template-columns: 1fr;
  }

  .weapp-image-wrapper {
    order: -1;
  }

  .case-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {

  .section-header h2 {
    font-size: 22px;
  }

  .core-grid,
  .values-grid,
  .cover-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .values-item {
    padding: 20px 15px;
  }

  .values-icon-wrapper {
    width: 60px;
    height: 60px;
    margin-bottom: 12px;
  }

  .values-title {
    font-size: 16px;
  }

  .values-item-company .values-title,
  .values-item-student .values-title {
    font-size: 17px;
  }

  .values-list {
    font-size: 13px;
  }

  .cover-item {
    padding: 15px 8px;
    font-size: 13px;
  }

  .action-column {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .action-item {
    flex: 1;
    min-width: 45%;
  }

  .case-desc {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .banner {
    height: auto;
    min-height: 40vh;
    padding: 60px 15px 40px;
  }

  .core-grid,
  .values-grid,
  .cover-grid {
    grid-template-columns: 1fr;
  }

  .values-icon-wrapper {
    width: 70px;
    height: 70px;
  }

  .action-item {
    min-width: 100%;
  }
}