/* ========== CASES ========== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.case-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition:
    transform 0.35s ease,
    box-shadow 0.35s ease;
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.case-visual {
  height: 180px;
  position: relative;
  overflow: hidden;
}

.case-visual-bg {
  position: absolute;
  inset: 0;
  transition: transform 0.6s ease;
}

.case-card:hover .case-visual-bg {
  transform: scale(1.05);
}

.case-visual-bg-1 {
  background: linear-gradient(135deg, #0b3d2e 0%, #1a6b45 50%, #27ae60 100%);
}

.case-visual-bg-1::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 40%, rgba(39, 174, 96, 0.4) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(11, 61, 46, 0.6) 0%, transparent 50%);
}

.case-visual-bg-2 {
  background: linear-gradient(135deg, #1a3a5c 0%, #2e6da0 50%, #3498db 100%);
}

.case-visual-bg-2::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 60% 30%, rgba(52, 152, 219, 0.4) 0%, transparent 50%),
    radial-gradient(circle at 30% 70%, rgba(26, 58, 92, 0.6) 0%, transparent 50%);
}

.case-visual-bg-3 {
  background: linear-gradient(135deg, #4a1942 0%, #7d3c98 50%, #a569bd 100%);
}

.case-visual-bg-3::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle at 40% 50%,
    rgba(165, 105, 189, 0.3) 0%,
    transparent 50%
  );
}

.case-visual-bg-4 {
  background: linear-gradient(135deg, #7d6608 0%, #b7950b 50%, #d4ac0d 100%);
}

.case-visual-bg-4::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 50% 40%, rgba(212, 172, 13, 0.3) 0%, transparent 50%);
}

.case-visual-label {
  position: absolute;
  bottom: 16px;
  left: 16px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.7);
  text-transform: uppercase;
}

.case-visual-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.12;
}

.case-visual-icon svg {
  width: 80px;
  height: 80px;
  stroke: #fff;
  fill: none;
  stroke-width: 0.8;
}

.case-card .case-visual-icon svg {
  width: 80px;
  height: 80px;
  stroke: #fff;
  fill: none;
  stroke-width: 0.8;
}

.case-body {
  padding: 20px;
  flex: 1 1 auto;
}

.case-body h4 {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.case-body p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.case-overlay-text {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  color: #fff;
  display: none;
}

.case-overlay-text h4 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.case-overlay-text p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
}

/* ========== INDUSTRY-EDUCATION ========== */
.iedu-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.iedu-visual {
  position: relative;
  height: 420px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #0d2137 0%, #163a5c 50%, #1f5f8b 100%);
}

.iedu-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(46, 134, 193, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 134, 193, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

.iedu-visual-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 2;
}

.iedu-visual-icon {
  width: 80px;
  height: 80px;
  border: 2px solid rgba(93, 173, 226, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.iedu-visual-icon svg {
  width: 36px;
  height: 36px;
  stroke: var(--primary-light);
  fill: none;
  stroke-width: 1.5;
}

.iedu-visual-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.iedu-visual-sub {
  font-size: 0.82rem;
  color: var(--text-on-dark-muted);
  margin-top: 8px;
}

.iedu-visual-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.iedu-visual .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
}

.iedu-visual .orb-1 {
  width: 200px;
  height: 200px;
  background: rgba(46, 134, 193, 0.15);
  top: 10%;
  right: 10%;
  animation: orbFloat1 8s ease-in-out infinite;
}

.iedu-visual .orb-2 {
  width: 150px;
  height: 150px;
  background: rgba(30, 132, 73, 0.1);
  bottom: 15%;
  left: 10%;
  animation: orbFloat2 10s ease-in-out infinite;
}

.iedu-content h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.iedu-content > p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.85;
  margin-bottom: 32px;
}

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

.iedu-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.iedu-feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(46, 134, 193, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.iedu-feature-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 1.5;
}

.iedu-feature h5 {
  font-size: 0.92rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.iedu-feature p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== 产品卡片（培训教育用） ========== */
.product-card {
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-card .product-img {
  height: 220px;
  overflow: hidden;
}

.product-card .product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.product-card:hover .product-img img {
  transform: scale(1.05);
}

.product-card .product-info {
  padding: 24px;
}

.product-card .product-info h3 {
  color: var(--text);
  margin-bottom: 10px;
  font-size: 1.15rem;
}

.product-card .product-info p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

/* 产品详情展开面板 */
.product-detail {
  display: none;
  padding: 20px 24px 24px;
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  flex: 1;
}

.product-detail.open {
  display: block;
}

.product-detail h4 {
  color: var(--primary);
  margin-bottom: 12px;
  font-size: 1rem;
}

.product-detail table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

.product-detail table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.product-detail table td:first-child {
  color: var(--text-secondary);
  width: 120px;
}

.product-detail p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

/* 培训教育模块按钮 */
.product-card .btn-outline {
  display: inline-block;
  padding: 10px 24px;
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.3s;
}

.product-card .btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.eight-adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.eight-adv-grid > div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

/* ========== NEWS ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.news-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  min-height: 360px;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.news-card-visual {
  position: relative;
  overflow: hidden;
  flex: 1 1 auto;
  min-height: 200px;
}

.news-card-image,
.news-card-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.news-card-video {
  background: #000;
}

.news-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.news-slider-item {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.4s ease,
    visibility 0.4s ease;
}

.news-slider-item.active {
  opacity: 1;
  visibility: visible;
}

.news-slider-item img,
.news-slider-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
  cursor: zoom-in;
}

.news-card-video {
  background: #000;
  cursor: zoom-in;
}

.media-lightbox {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.92);
  z-index: 3000;
  padding: 20px;
  width: 100vw;
  height: 100dvh;
  max-width: none;
  max-height: none;
  margin: 0;
  border: 0;
}

.media-lightbox[open] {
  display: flex;
}

.media-lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
}

.media-lightbox-content {
  position: relative;
  max-width: min(1200px, 100%);
  max-height: min(90vh, 100%);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.media-lightbox-content img,
.media-lightbox-content video {
  max-width: 100%;
  max-height: calc(100dvh - 80px);
  width: auto;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.media-lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  z-index: 3;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  line-height: 1;
  transition: background 0.2s ease;
}

.media-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.18);
}

.media-lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.4);
  color: #fff;
  z-index: 3;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  line-height: 1;
  transition:
    background 0.2s ease,
    transform 0.2s ease;
}

.media-lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-50%) scale(1.05);
}

.media-lightbox-nav.prev {
  left: 20px;
}

.media-lightbox-nav.next {
  right: 20px;
}

.media-lightbox-nav.hidden {
  display: none;
}

.news-slider-controls {
  position: absolute;
  top: 50%;
  left: 16px;
  right: 16px;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.slider-nav {
  pointer-events: auto;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.45);
  background: rgba(15, 23, 42, 0.55);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    background 0.25s ease,
    transform 0.25s ease;
}

.slider-nav:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: scale(1.02);
}

.news-slider-dots {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.news-slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.55);
  cursor: pointer;
  transition:
    transform 0.2s ease,
    background 0.2s ease;
}

.news-slider-dot.active {
  background: rgba(255, 255, 255, 0.95);
  transform: scale(1.15);
}

.news-card-visual-1 {
  background: linear-gradient(135deg, #1a5276, #2e86c1);
}

.news-card-visual-2 {
  background: linear-gradient(135deg, #0b3d2e, #27ae60);
}

.news-card-visual-3 {
  background: linear-gradient(135deg, #4a235a, #7d3c98);
}

.news-date-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(8px);
  padding: 8px 14px;
  border-radius: var(--radius);
  text-align: center;
  min-width: 56px;
}

.news-date-badge .day {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 500;
  color: #fff;
  line-height: 1;
}

.news-date-badge .month {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.05em;
}

.news-card-body {
  padding: 24px;
}

.news-card-tag {
  display: inline-block;
  font-size: 0.7rem;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.news-card-body h4 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 10px;
  line-height: 1.5;
  max-height: calc(1.5em * 2);
  overflow: hidden;
}

.news-card-body p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-height: calc(1.7em * 3);
  overflow: hidden;
}