.fullscreen-section {
    min-height: 100vh;          /* 至少一屏高 */
    display: flex;
    align-items: center;        /* 垂直居中内容 */
    justify-content: center;    /* 水平居中（可选） */
    flex-direction: column;     /* 内容竖向排列 */
}
.banner-wrapper {
            height: 100vh; /* 全屏高度，也可用vh-100类，但需确保父元素无限制 */
            min-height: 500px; /* 小屏时最小高度 */
        }
        .banner-video {
            object-fit: cover; /* 视频铺满容器，不变形 */
            z-index: 0;
        }
    .banner-wrapper .advantage-list{
      color: #fff;
    }
        /* 移动端优化：小屏时用背景图替代视频 */
        @media (max-width: 767.98px) {
            .banner-video {
                display: none;
            }
            .banner-wrapper {
                background: url('fallback.jpg') no-repeat center center / cover;
            }
        }
  /*公司介绍部分*/
#company-image{
    position: relative;
    z-index: 5;
     border-radius: 0 60px 0px 60px;
            overflow: hidden;            
            background-color: #eef2ff;  
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.1);
            transition: box-shadow 0.3s ease;
    height: 400px;
    width: 100%;
    margin-right: 50px;
    
}
#company-image:hover{
    box-shadow: 0 25px 40px -12px rgba(0, 0, 0, 0.2);
}
#company-image img{
     height: 100%;
            width: auto;
            display: block;
            transition: transform 0.5s cubic-bezier(0.2, 0.9, 0.4, 1.1), filter 0.4s ease;
            transform: scale(1);
            filter: brightness(0.98) contrast(1.02);
            will-change: transform;
}
#company-image:hover img{
     transform: scale(1.08);
            filter: brightness(1.03) contrast(1.05);
} 
#company-intro{position: relative; z-index: 6;}
 #company-intro h2{
   margin-top: 15px;
  font-weight: normal;
  color: var(--blue-ocean);
 }
 #company-intro h4{
  font-size: 22px;
  color: #666;
}
  #company-intro p {
    font-size: 16px;
    line-height: 1.876;
  display: -webkit-box;
  -webkit-line-clamp: 7;    /* 显示行数 */
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}
#company-intro .innerlogo{
    position: absolute; 
    bottom: 0;
    left: 0; width: 100%; height:30%;
background-image: url('/assets/img/logo2.jpg');  
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
            opacity: 0.2;
            z-index:99;
            pointer-events: none; }

  .company-card {
           
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
           
        }
        .company-card:hover {
           
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
        }
 .company-card  i {
            font-size: 1.4rem;
              transition: transform 0.6s;
   transform-style: preserve-3d; 
        }
        .company-card:hover i{
            color: var(--blue-ocean);
             transform: rotateY(180deg);
        }


  /* 案例列表：*/
.horizontal-accordion {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: stretch;
  width: 100%;              
  background: transparent;
}

/* 卡片基础*/
.accordion-card {
  height: 600px;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  background-color: #ffffff;
  border: none;
  border-radius: 1.2rem;
  box-shadow: 0 10px 25px -5px rgba(0,0,0,0.08);
  overflow: hidden;
  transition: box-shadow 0.2s;
  flex: 0 0 auto;           
}

/* 展开卡片：占据所有剩余空间 */
.accordion-card.expanded {
  flex: 1 1 auto;           /* 允许伸缩，填满剩余宽度 */
  min-width: 200px;         /* 防止内容过窄，可自行调整 */
}

/* 左侧标题区  */
.accordion-card .card-header {
  flex: 0 0 auto;           /* 固定宽度 */
  width: 90px;              /* 标题窄列宽度 */
  background: linear-gradient(145deg, #f0f5fa 0%, #e6ecf3 100%);
  border-right: 2px solid rgba(255,255,255,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.25rem;
  color: #1d3b4f;
  text-align: center;
  line-height: 1.3;
  padding: 0.75rem 0.25rem;
  word-break: break-word;
  border-radius: 1.2rem 0 0 1.2rem;
}

/* 右侧内容区 —— 折叠时宽度为0，通过 max-width 过渡展开 */
.accordion-card .card-body {
  max-width: 0;             /* 折叠时最大宽度为0，完全隐藏 */
  overflow: hidden;
  transition: max-width 0.4s cubic-bezier(0.2, 0.9, 0.3, 1);
  background-color: white;
  padding: 0;               /* 内边距交给内部包装器 */
  border-radius: 0 1.2rem 1.2rem 0;
  flex: 1;                  /* 让 .card-body 撑满卡片剩余宽度（重要） */
}


.accordion-card.expanded .card-body {
  max-width: 2000px;        /* 一个远大于实际宽度的值，保证完全展开 */
}

/* 内部包装器：宽度 100%，自适应父容器 */
.accordion-card .card-body .content-wrapper {
  width: 100%;
  height: 100%;
  box-sizing: border-box;
    position: relative;
    z-index: 9;
}
.accordion-card .cases-img-box img{
    width: 100%;
    height: 100%;
}
.accordion-card .cases-cover{
    position: absolute; width: 100%; height: 100%; top: 0; left: 0; 
    background: rgba(24, 81, 143, 0.7);
     z-index: 99;
}
.cases-cover h3{font-weight: 600; color: #fff;}
.cases-cover .cases-con{height: 85%;}

 
/* 描述文字 */
.accordion-card .card-body p {
  line-height: 1.8;
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
 
.accordion-card .card-body h6{
font-weight: 800;
}

/* 标签小 badge */
.accordion-card .card-body .domain-badge {
  display: inline-block;
  background-color: #e7eef7;
  color: #1f5068;
  font-size: 0.75rem;
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  margin-top: 0.5rem;
}
.compare-imgs{   
    display: flex;
    flex-direction: row;        
    justify-content: center;    
}                   
.compare-imgs .compare-img{width: 180px; height: 180px; overflow: hidden; position: relative; text-align: center; z-index: 24; padding: 15px;}
.compare-imgs .compare-img span{display: block; z-index: 2345;width: 100px; position: absolute; bottom: 0; left: 25%; 
  }
 
.compare-img img{ max-width:100%;height: 100%; object-fit: cover;}
.cases-products{  height: 60%;}
.cases-products img{max-width: 100%; max-height: 85%; height: auto;  object-fit: cover;}
.cases-products p{font-size: 14px; color: #666;}
 
.accordion-card .card-header::before {
  content: "●";
  color: var(--blue-ocean);
  font-size: 1.8rem;
  padding-bottom: 10px;
  opacity: 0.8;
}

/* 可选：移除水平滚动条（因为现在宽度自适应） */
.horizontal-accordion {
  overflow-x: visible;      /* 或直接删除 overflow-x 属性 */
}

/* 响应式微调：窄屏幕下标题列更窄，内容最小宽度保证可读 */
@media (max-width: 720px) {
  .accordion-card .card-header {
    width: 75px;
    font-size: 1rem;
  }
  .accordion-card.expanded {
    min-width: 160px;
  }
  .accordion-card .card-body .content-wrapper {
    padding: 1rem;
  }
}
     /* 公司实力卡片 */
        .strength-item {
            text-align: center;
            padding: 2rem 1.5rem;
            border-radius: 24px;
            background: #ffffff;
            box-shadow: 0 8px 25px rgba(0,0,0,0.02);
            transition: all 0.2s;
            height: 100%;
            border: 1px solid rgba(0,0,0,0.02);
        }
        .strength-item:hover {
            background: #f8fbff;
            border-color: rgba(13,110,253,0.1);
        }
        .strength-item i {
            font-size: 2.8rem;
            color: var(--brand-blue);
            margin-bottom: 1rem;
        }
        .strength-item h4 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .strength-item p {
            color: #5e6f7e;
        }
      /* 背景大图容器 - 每个领域独立背景，切换时更新 */
        .hero-bg-container {
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 35px -10px rgba(0, 0, 0, 0.1);
            transition: background-image 0.4s ease-in-out;
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            min-height: 560px;
        }

        
        .hero-bg-container::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(2px);
            z-index: 1;
            pointer-events: none;
        }

        /* 内容区位于上层 */
        .hero-content {
            position: relative;
            z-index: 3;
            padding: 2.5rem 2rem;
        }
        
        /* 透明磨砂标题带 (玻璃质感) */
        .tabs-glass-strip {
          position: relative;
           z-index: 511;
            display: flex;
  align-items: center;
            
        }
        .a-lists{position: relative;transition-delay: .8s;}
        .a-li{
          position:absolute; 
          display: flex;
          width: 100%;
         
          
         top: .9375rem;
			height: 5rem;
          background: rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(12px);
            z-index: 1;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03), 0 1px 1px rgba(0,0,0,0.02);
            border: 1px solid rgba(255,255,255,.1) solid;}
          .a-li::after{position: absolute;
				z-index: 1;
				top: 0;
				left: 0;
				content: '';
				display: block;
				width: 100%;
				height: 100%;
				background: rgba(0, 0, 0, .2);
				-webkit-backdrop-filter: blur(15px);
				backdrop-filter: blur(15px);}

        .industry-hover-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.6rem;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        

      
        .tab-item {
            display: flex;
  align-items: center;
  justify-content: center;
            gap:20px;
            padding: 0.6rem 1.6rem;
             height: 6.875rem;
             border-radius: 1.25rem 0 1.25rem 0;
            font-size: 1.25rem;
            color: #FFFFFF;
            background: transparent;
            cursor: pointer;
            transition: all 0.25s ease;
            white-space: nowrap;
            border: none;
            
        }

        .tab-item i {
            font-size: 1.4rem;
            color: #ffffff;
              transition: transform 0.6s;
   transform-style: preserve-3d; 

        }
       .tab-item:hover {
            background:  var(--blue);
            color: #FFFFFF;
             transform: translateY(-1px);
        }
        .tab-item:hover i{
             transform: rotateY(180deg);

        }

        /* 选中色块 (明亮彩色) */
        .tab-item.active-tab {
            background: var(--blue);
            color: white;
           
            box-shadow: 0 6px 12px rgba(45, 139, 203, 0.25);
        }

        .tab-item.active-tab i {
            color: white;
        }

        
        .info-card {
            backdrop-filter: blur(8px);
            padding: 2rem;
            transition: all 0.3s;
            color: #fff;
            font-size: 16px;
            line-height: 32px;
        }
        .feature-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin: 1rem 0;
        }

        .feature-tag {
            background: #eef4fc;
            padding: 0.1rem 1rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
            color: #1a6390;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        

        /* 右侧装饰区 (可选) */
        .stat-badge {
           /* background: rgba(255,255,245,0.8);*/
            border-radius: 1.2rem;
            padding: 1rem;
            text-align: center;
           /* backdrop-filter: blur(4px);*/
        }
        .stat-badge img{height: 350px;}
         

       @media (max-width: 768px) {
    .hero-bg-container {
        min-height: 620px;
    }
    .hero-content {
        padding: 1rem;
    }
    /* 标题带改为横向滚动 */
    .tabs-glass-strip {
        width: 120%;
        overflow-x: auto;
        overflow-y: hidden;
        white-space: nowrap;
        scrollbar-width: thin;
        -webkit-overflow-scrolling: touch;
        border-radius: 60px;
        padding: 0.4rem 0.2rem;
        
    }
    .industry-hover-tabs {
        display: inline-flex;
        flex-wrap: nowrap;
        gap: 0.5rem;
        padding: 0 0.5rem;
    }
    .tab-item {
        white-space: nowrap;
        padding: 0.45rem 1.2rem;
        font-size: 0.85rem;
    }
    .info-card {
        padding: 1.2rem;
    }
    .industry-title-main {
        font-size: 1.4rem;
    }
    .feature-tag {
        font-size: 0.7rem;
    }
    .stat-badge {
        margin-top: 1rem;
    }
    /* 隐藏滚动条（可选） */
    .tabs-glass-strip::-webkit-scrollbar {
        height: 3px;
    }
    .tabs-glass-strip::-webkit-scrollbar-thumb {
        background: rgba(51, 48, 48, 0.5);
        border-radius: 10px;
    }
}
        @media (max-width: 480px) {
            .tab-item {
                padding: 0.3rem 0.9rem;
                font-size: 0.7rem;
            }
        }

        /* 动画 */
        @keyframes fadeSlide {
            from { opacity: 0; transform: translateY(12px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .info-card {
            animation: fadeSlide 0.3s ease-out;
        }
        /* 背景切换平滑过渡 */
        .hero-bg-container {
            transition: background-image 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1);
        } 
 /* 产品部分优化 */
.product-card {
    position: relative;
    z-index: 5;
    height: 420px; /* 微调高度，让底部条更协调 */
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px 3px rgba(0,0,0,0.1);
    background: white;
    border-radius: 8px; /* 增加圆角，和参考图风格匹配 */
    overflow: hidden; /* 防止内容溢出 */
}
.product-card:hover {
    box-shadow: 0 8px 20px rgba(0,0,0,0.15); /* 优化hover阴影 */
    transform: translateY(-5px); /* 增加轻微上浮效果，提升层次感 */
}

/* 图片区域 */
.product-card .product-image {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40%;
    height: 100%;
    position: relative;
}
.product-card img {
    max-height: 75%;
    max-width: 90%;
    object-fit: contain; /* 保证图片不变形 */
}

/* 文字信息区域 */
.product-info {
    width: 60%;
    display: flex;
    flex-direction: column;
}
.product-info .product-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #222;
}
.product-info .product-features {
    font-size: 0.95rem;
    line-height: 1.6;
    border-radius: 4px;
}
.product-tags .product-tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: #fff;
    background: var(--blue); /* 使用Bootstrap主色调，和底部条呼应 */
}

/* 图片hover放大效果 */
.zoom-on-hover {
    transition: transform 0.35s cubic-bezier(0.2, 0, 0, 1);
    will-change: transform;     
    transform: scale(1);
}
.img-hover-card:hover .zoom-on-hover {
    transform: scale(1.08);
}

/* 底部固定条 */
.gotoproduct {
    position: relative;
    width: 100%;
    height: 45px;
    text-align: center;
    background:var(--blue);
    color: #fff;
    font-weight: 500;
    transition: background-color 0.3s ease;
}
.gotoproduct:hover {
    background-color:var(--blue);
    color: #eef2ff;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .product-card {
        height: auto;
        min-height: 420px;
    }
    .product-card > .d-flex {
        flex-direction: column;
    }
    .product-info, .product-image {
        width: 100%;
        height: auto;
    }
    .product-image {
        order: -1; /* 移动端图片上移 */
        padding: 1rem;
        min-height: 180px;
    }
    .product-info {
        padding: 1.5rem !important;
    }
}

        
    /*news*/
 .news-card {
            border: none;
            border-radius: 20px;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            background: white;
        }

        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
        }
        .badge-news {
            background: #eef2ff;
            color: #2563eb;
            border-radius: 50px;
            padding: 5px 12px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .faq-item {
            border-bottom: 1px solid #eef2ff;
            padding: 1rem 0;
        }
        .faq-question {
            font-weight: 600;
            cursor: pointer;
            transition: color 0.2s;
        }
        .faq-question:hover {
            color: #2563eb;
        }
        .faq-answer {
            font-size: 0.9rem;
            color: #4b5563;
            padding-top: 0.5rem;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .timeline-item {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .timeline-icon {
            width: 40px;
            height: 40px;
            background: #eef2ff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #2563eb;
            flex-shrink: 0;
        }
        .demo-block {
            margin-bottom: 4rem;
            padding: 2rem 0;
            border-bottom: 1px solid #e2e8f0;
        }
        .demo-block:last-child {
            border-bottom: none;
        }
        .capsule-tab {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
            margin-bottom: 1.5rem;
        }
        .capsule-tab .btn {
            border-radius: 50px;
            padding: 0.5rem 1.5rem;
            font-weight: 500;
            background: #f1f5f9;
            color: #1e293b;
            border: none;
            border-radius: 14px 0 14px 0;
        }
        .capsule-tab .btn.active {
            background: var(--blue);
            border-radius: 14px 0 14px 0;
            color: white;
            box-shadow: 0 4px 12px rgba(37,99,235,0.3);
        }
         #company .news-image { overflow: hidden; width: 200px; height: 200px;}
        #company .news-image img{ max-height: 100%;}
        #company .news-detail{
            display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
        }
          /* 针对对比卡片容器的额外美化，保持干净现代 */
        .compare-box {
            /* 背景可轻微增加视觉层次，但不影响功能，可选 */
            background-color: #f8f9fa;
            border-radius: 1rem;
            padding: 1.5rem 1rem;
        }
        /* 每个抛光卡片 (paoguang) 统一宽度，确保并列时对称美观 */
        .paoguang-card {
            width: 260px;          /* 固定卡片宽度，让两张卡片完全对称，同时间隙可控 */
            max-width: 100%;       /* 移动端适配：窄屏幕时自动收缩但保留比例 */
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            border-radius: 1rem;
            background: white;
            overflow: hidden;
        }
        /* 卡片悬浮微效果 (提升用户体验，不破坏布局) */
        .paoguang-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.1);
        }
        /* 统一图片区域：宽高固定，保持比例且居中裁剪，使“抛光前/后”视觉整齐 */
        .paoguang-card .compare-img {
            width: 100%;
            height: 180px;          /* 固定高度，配合object-fit保证所有图片统一展示区域 */
            object-fit: cover;      /* 图片铺满且不拉伸变形，自动裁剪中心区域 */
            border-bottom: 1px solid rgba(0,0,0,0.05);
            background-color: #e9ecef; /* 图片加载时的占位背景色 */
        }
        /* 文字链接样式：优雅、居中对齐，与Bootstrap完美融合 */
        .paoguang-card .compare-link {
            font-weight: 600;
            color: #2c3e50;
            text-decoration: none;
            padding: 0.75rem 0.5rem;
            transition: color 0.2s;
            font-size: 1rem;
            letter-spacing: 1px;
        }
        .paoguang-card .compare-link:hover {
            color: #0d6efd;
            text-decoration: underline;
        }
        /* 适配小屏幕: 卡片宽度适当缩小，保证间隙和居中的优雅 */
        @media (max-width: 576px) {
            .paoguang-card {
                width: 220px;
            }
            .paoguang-card .compare-img {
                height: 150px;
            }
        }
        /* 确保flex容器内卡片换行时依然居中，且间隙保持 */
        .compare-box {
            gap: 1.8rem;    /* 中间空隙更大方，符合“中间有空隙”要求 */
        }
      

        /* 优势板块基础样式 */
    .advantage-section {
      min-height: 100vh;
      background: url('https://picsum.photos/id/1048/1920/1080') no-repeat center center;
      background-size: cover;
      background-color: #050818;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .advantage-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 5, 25, 0.85);
      z-index: 1;
    }

    /* 核心中心圆形 绝对居中 */
    .center-circle {
      width: 320px;
      height: 320px;
      border-radius: 50%;
      border: 3px solid rgba(0, 123, 255, 0.7);
      box-shadow: 0 0 30px rgba(0, 153, 255, 0.3);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      position: relative;
      z-index: 10;
      background: rgba(0, 10, 30, 0.5);
      backdrop-filter: blur(5px);
       animation: blueGlow 4s ease-in-out infinite alternate;
    }
    .center-circle h2 {
      font-size: 3.5rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 0.5rem;
    }
    .center-circle p {
      font-size: 1.5rem;
      color: #cce5ff;
      letter-spacing: 6px;
      margin: 0;
    }

    /* 外层环形容器 与中心圆同心 */
    .circle-wrap {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 700px;
      height: 700px;
      border-radius: 50%;
      z-index: 5;
    }
    /* 环形虚线底色 */
    .circle-bg-line {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border: 2px dashed rgba(100, 180, 255, 0.2);
      border-radius: 50%;
    }
   

    /* 底层灰色圆环（未点亮的底色） */
    .circle-bg-line::before {
      position: absolute;
      content: '';
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border: 2px dashed rgba(100, 180, 255, 0.2);
      border-radius: 50%;
  
    }

    .circle-bg-line::after {
     position: absolute;
      content: '';
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border: 2px dashed #C0C0C0; /* 银色 */
       border-radius: 50%;
      
      /* 核心：锥形遮罩 → 6段逐段显示 */
      mask: conic-gradient(
        #000 0% 0%,    /* 开始：0段 */
        transparent 0% 100%
      );
      
      animation: load6 4.8s linear forwards;
    }

    /* 6段逐段点亮动画 */
    @keyframes load6 {
      0%   { mask: conic-gradient(#000 0% 0%, transparent 0% 100%); }
      16.7%{ mask: conic-gradient(#000 0% 16.7%, transparent 16.7% 100%); }
      33.3%{ mask: conic-gradient(#000 0% 33.3%, transparent 33.3% 100%); }
      50%  { mask: conic-gradient(#000 0% 50%, transparent 50% 100%); }
      66.7%{ mask: conic-gradient(#000 0% 66.7%, transparent 66.7% 100%); }
      83.3%{ mask: conic-gradient(#000 0% 83.3%, transparent 83.3% 100%); }
      100% { mask: conic-gradient(#000 0% 100%, transparent 100% 100%); }
    }

    /* 6个优势节点 初始隐藏状态 */
    .advantage-item {
      position: absolute;
      top: 49%;
      left: 0%;
      width: 700px;
      text-align: center;
      color: #fff;
      opacity: 0;
      transform: translate(-50%, -50%) scale(0.8);
      transition: all 0.8s ease;
    }
    /* 点位圆点 初始暗淡 */
    .item-dot {
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: rgba(80, 160, 255, 0.3);
      margin: 0 auto 12px;
      transition: all 0.8s ease;
    }

    /* 滚动触发后添加active类 逐个点亮 */
    .circle-wrap.active .advantage-item {
      opacity: 1;
      transform: translate(-50%, -50%) scale(1);
    }
    .circle-wrap.active .item-dot {
      background: #007bff;
      box-shadow: 0 0 18px 4px #0099ff;
    }

    /* 6个点正六边形均匀分布 严格1-6顺序 */
    .circle-wrap.active .item-1 { transition-delay: 0s; }
    .circle-wrap.active .item-2 { transition-delay: 0.7s; }
    .circle-wrap.active .item-3 { transition-delay: 1.4s; }
    .circle-wrap.active .item-4 { transition-delay: 2.1s; }
    .circle-wrap.active .item-5 { transition-delay: 2.8s; }
    .circle-wrap.active .item-6 { transition-delay: 3.5s; }

    /* 角度定位 正六边形均分60° */
    .item-1 { transform: rotate(0deg) translateY(-350px) rotate(0deg) !important; }
    .item-2 { transform: rotate(60deg) translateY(-350px) rotate(-60deg) !important; }
    .item-3 { transform: rotate(120deg) translateY(-350px) rotate(-120deg) !important; }
    .item-4 { transform: rotate(180deg) translateY(-350px) rotate(-180deg) !important; }
    .item-5 { transform: rotate(240deg) translateY(-350px) rotate(-240deg) !important; }
    .item-6 { transform: rotate(300deg) translateY(-350px) rotate(-300deg) !important; }

    /* 响应式移动端适配 */
    @media (max-width: 768px) {
      .center-circle {
        width: 200px;
        height: 200px;
      }
      .center-circle h2 {
        font-size: 2rem;
      }
      .center-circle p {
        font-size: 1rem;
        letter-spacing: 3px;
      }
      .circle-wrap {
        width: 380px;
        height: 380px;
      }
      .advantage-item {
        width: 100px;
        font-size: 0.8rem;
      }
      .item-1,.item-2,.item-3,.item-4,.item-5,.item-6 {
        transform: rotate(calc(var(--deg))) translateY(-190px) rotate(calc(-1*var(--deg))) !important;
      }
    }