/* 案例列表页面专用样式 */
:root {
  --primary-color: #333;
  --secondary-color: #666;
  --accent-color: #f5f5f5;
  --light-color: #fff;
  --dark-color: #222;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --transition: all 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
  --border-radius: 8px;
  --main-font: 'Noto Serif SC', serif;
}

/* 页面标题 */
.page-header {
  height: 300px;
  background-color: var(--primary-color);
  background-image: ();
  background-size: cover;
  background-position: center;
  color: var(--light-color);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  /*margin-top: 70px;*/
  position: relative;
  overflow: hidden; /* 防止视频溢出 */
}

/* 视频背景样式 */
.video-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  overflow: hidden;
}

.video-tvc {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translateX(-50%) translateY(-50%);
  object-fit: cover;
}

.slide-inner--image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  z-index: -1;
  opacity: 0.5; /* 作为视频无法播放时的背景 */
}

/* 为页面标题添加半透明遮罩，确保文字清晰可见 */
.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: -1;
}

.page-header h1 {
  font-size: 3.2rem;
  font-weight: 300;
  margin-bottom: 20px;
  letter-spacing: 2px;
  font-family: var(--main-font);
  position: relative; /* 确保文本在视频上层 */
  z-index: 1;
}

.page-header p {
  font-size: 1.3rem;
  max-width: 600px;
  margin: 0 auto;
  opacity: 0.9;
  position: relative; /* 确保文本在视频上层 */
  z-index: 1;
}

/* 案例筛选 - 使用下载中心的样式 */
.resource-tabs {
    background-color: var(--light-color);
    padding: 20px 0;
    position: sticky;
    /*top: 70px;*/
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.tabs-container {
    display: flex;
    overflow-x: auto;
    gap: 10px;
    padding: 5px 0;
    justify-content: center;
}

.tab-btn {
    background: none;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--secondary-color);
    position: relative;
    white-space: nowrap;
    font-family: var(--main-font);
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: #df1f29;
    transition: var(--transition);
}

.tab-btn:hover, 
.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn:hover::after, 
.tab-btn.active::after {
    width: 30px;
}

/* 案例列表内容 */
.caseslist-content {
  padding: 60px 0;
  background-color: #fafafa;
}

.caseslist-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(650px, 1fr));
  gap: 40px;
  transition: opacity 0.5s ease, transform 0.5s ease;
  min-height: 400px;
  position: relative;
}

.caseslist-grid.filtering {
  pointer-events: none;
}

.caseslist-item {
  display: flex;
  border-radius: var(--border-radius);
  background-color: var(--light-color);
  box-shadow: var(--shadow);
  transition: var(--transition);
  overflow: hidden;
  opacity: 1;
  transform: translateY(0);
}

.caseslist-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.caseslist-image {
  flex: 1;
  overflow: hidden;
  min-height: 350px;
  position: relative;
}

.caseslist-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.1));
  z-index: 1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.caseslist-item:hover .caseslist-image::before {
  opacity: 1;
}

.caseslist-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s ease;
  filter: brightness(0.98);
}

.caseslist-image img.loaded {
  animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
  0% { opacity: 0.7; }
  100% { opacity: 1; }
}

.caseslist-item:hover .caseslist-image img {
  transform: scale(1.08);
  filter: brightness(1);
}

.caseslist-info {
  flex: 1;
  padding: 35px;
  display: flex;
  flex-direction: column;
}

.caseslist-meta {
  display: flex;
  gap: 15px;
  margin-bottom: 20px;
}

.caseslist-category,
.caseslist-date {
  font-size: 0.85rem;
  color: var(--secondary-color);
  padding: 6px 12px;
  background-color: var(--accent-color);
  border-radius: 30px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
}

.caseslist-category i,
.caseslist-date i {
  font-size: 0.8rem;
  color: var(--primary-color);
}

.caseslist-info h3 {
  font-size: 1.8rem;
  margin-bottom: 18px;
  font-weight: 500;
  color: var(--primary-color);
  font-family: var(--main-font);
  line-height: 1.3;
}

.caseslist-info p {
  margin-bottom: 25px;
  line-height: 1.8;
  color: var(--secondary-color);
  flex-grow: 1;
  font-size: 1.05rem;
}

.btn-more {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--primary-color);
  color: var(--light-color);
  border: none;
  border-radius: var(--border-radius);
  transition: var(--transition);
  font-size: 0.95rem;
  align-self: flex-start;
  font-weight: 500;
  text-decoration: none;
  opacity: 0.9;
  transform: translateY(3px);
}

.btn-more i {
  margin-left: 6px;
  font-size: 0.85em;
  transition: transform 0.3s ease;
}

.btn-more:hover i {
  transform: translateX(4px);
}

.btn-more:hover {
  background-color: var(--dark-color);
  transform: translateY(-3px);
}

/* 无搜索结果 */
.no-results {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  background-color: var(--light-color);
  padding: 40px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  width: 90%;
  max-width: 500px;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.no-results-icon {
  width: 80px;
  height: 80px;
  background-color: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.no-results-icon i {
  font-size: 2rem;
  color: var(--primary-color);
}

.no-results h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--primary-color);
  font-family: var(--main-font);
}

.no-results p {
  color: var(--secondary-color);
  font-size: 1.1rem;
}

/* 分页 */
.caseslist-pagination {
  padding: 40px 0 70px;
  background-color: #fafafa;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background-color: var(--light-color);
  border-radius: var(--border-radius);
  color: var(--secondary-color);
  transition: var(--transition);
  font-weight: 500;
  text-decoration: none;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.pagination a:hover,
.pagination a.active {
  background-color: var(--primary-color);
  color: var(--light-color);
}

.pagination a.clicked {
  transform: scale(0.95);
}

.pagination a.next {
  width: auto;
  padding: 0 20px;
}

.pagination a.next i {
  margin-left: 5px;
  font-size: 0.85em;
  transition: transform 0.3s ease;
}

.pagination a.next:hover i {
  transform: translateX(3px);
}

/* 联系我们 */
.caseslist-contact {
  padding: 120px 0;
  background-color: var(--dark-color);
  background-image: ;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--light-color);
  text-align: center;
}

.caseslist-contact h2 {
  font-size: 2.6rem;
  margin-bottom: 20px;
  font-weight: 300;
  font-family: var(--main-font);
}

.caseslist-contact p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 40px;
  opacity: 0.9;
}

.caseslist-contact .btn {
  background-color: transparent;
  border: 2px solid var(--light-color);
  padding: 14px 35px;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  color: var(--light-color);
  text-decoration: none;
}

.caseslist-contact .btn i {
  margin-left: 8px;
  font-size: 0.85em;
  transition: transform 0.3s ease;
}

.caseslist-contact .btn:hover i {
  transform: translateX(5px);
}

.caseslist-contact .btn:hover {
  background-color: var(--light-color);
  color: var(--primary-color);
  transform: translateY(-5px);
}

/* 响应式设计 */
@media (max-width: 1200px) {
  .caseslist-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 992px) {
  .caseslist-item {
    flex-direction: column;
  }
  
  .caseslist-image {
    height: 350px;
  }
  
  .caseslist-filter {
    position: relative;
    top: 0;
  }
}

@media (max-width: 768px) {
  .page-header {
    height: 250px;
  }
  
  .page-header h1 {
    font-size: 2.4rem;
  }
  
  .page-header p {
    font-size: 1.1rem;
  }
  
  .filter-group {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .caseslist-contact h2 {
    font-size: 2rem;
  }
  
  .caseslist-info h3 {
    font-size: 1.5rem;
  }
}

@media (max-width: 576px) {
  .filter-buttons {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 5px;
    width: 100%;
  }
  
  .caseslist-info {
    padding: 25px 20px;
  }
  
  .btn-more {
    width: 100%;
    text-align: center;
  }
  
  .pagination a {
    width: 40px;
    height: 40px;
  }
  
  .no-results {
    padding: 30px 20px;
  }
  
  .no-results-icon {
    width: 60px;
    height: 60px;
  }
}