.tongling-panorama {
  background-color: #f5faff;
  padding: 80px 0;
  text-align: center;
}

.tongling-intro {
  margin-top: 60px;
  margin-bottom: 60px;
  text-align: center;
}

.tongling-intro h2 {
  font-size: 36px;
  font-weight: bold;
  color: #333;
  margin-bottom: 30px;
}

.tongling-intro p {
  font-size: 14px;
  color: #666;
  line-height: 2;
  margin-bottom: 20px;
  text-align: left;
  /* text-indent: 2em; */
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.tongling-panorama h2 {
  font-size: 36px;
  font-weight: bold;
  color: #333;
  margin-bottom: 50px;
}

.tongling-panorama .panorama-image {
  max-width: 100%;
  margin: 0 auto;
  border-radius: 8px;
  overflow: hidden;
  /* box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05); */
}

.tongling-panorama .panorama-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* Core Base Section */
.core-base {
  background-color: #fff;
  padding: 80px 0;
  text-align: center;
}

.core-base h2 {
  font-size: 36px;
  font-weight: bold;
  color: #333;
  margin-bottom: 40px;
}

/* Tabs */
.core-tabs {
  display: flex;
  justify-content: center;
  gap: 150px;
  margin-bottom: 40px;
}

.core-tab-btn {
  padding: 10px 0;
  font-size: 20px;
  font-weight: bold;
  border: none;
  background-color: transparent;
  color: #333;
  cursor: pointer;
  position: relative;
  transition: color 0.3s ease;
}

.core-tab-btn.active {
  background-color: transparent;
  color: #333;
}

.core-tab-btn.active::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 5px;
  background-color: #0045ff;
  border-radius: 4px;
}

.core-tab-btn:hover:not(.active) {
  background-color: transparent;
  color: #0045ff;
}

/* Tab Content */
.core-tab-pane {
  display: none;
}

.core-tab-pane.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.core-desc {
  max-width: 1000px;
  margin: 0 auto 50px;
  text-align: left;
  line-height: 1.8;
  color: #666;
  font-size: 14px;
  text-indent: 2em;
}

/* Diagram */
.core-diagram-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.core-diagram-container img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.empty-state {
  padding: 60px;
  background-color: #f9f9f9;
  border-radius: 8px;
  color: #999;
}

/* Core Capabilities Section */
.core-capabilities {
  background-color: #f5faff;
  padding: 80px 0;
  text-align: center;
}

.core-capabilities h2 {
  font-size: 36px;
  font-weight: bold;
  color: #333;
  margin-bottom: 50px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.capability-card {
  background-color: #fff;
  border-radius: 12px;
  padding: 40px;
  text-align: left;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.03);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.capability-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.capability-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle at top right, #eef5ff 0%, transparent 70%);
  border-radius: 0 12px 0 100%;
  pointer-events: none;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
}

.card-header h3 {
  font-size: 22px;
  font-weight: bold;
  color: #333;
  margin: 0;
  line-height: 1.4;
}

.icon-wrapper {
  width: 96px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0045ff;
}

.icon-wrapper svg {
  width: 48px;
  height: 48px;
  filter: drop-shadow(0 4px 6px rgba(0, 69, 255, 0.2));
}

.capability-list {
  padding: 0;
  margin: 0;
  list-style: none;
  position: relative;
  z-index: 1;
}

.capability-list li {
  margin-bottom: 25px;
  padding-left: 25px;
  position: relative;
}

.capability-list li:last-child {
  margin-bottom: 0;
}

.capability-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 8px;
  border-left: 2px solid #0045ff;
  border-bottom: 2px solid #0045ff;
  transform: rotate(-45deg);
}

.capability-list h4 {
  font-size: 16px;
  font-weight: bold;
  color: #333;
  margin-bottom: 8px;
}

.capability-list p {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
  margin: 0;
}