:root{
      /* 品牌色彩保持蓝紫渐变系 */
      --brand-primary: #3b82f6;      /* 主蓝色 */
      --brand-secondary: #8b5cf6;    /* 辅助紫色 */
      --brand-gradient: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
      --accent: #f97316;             /* 亮橙色用于突出按钮和交互元素 */
      --accent-hover: #ea580c;
      --ink: #0f172a;                 /* 深色文字 */
      --muted: #64748b;               /* 次级文字 */
      --light-muted: #94a3b8;         /* 更浅的文字 */
      --bg-dark: #0f172a;             /* 顶部/底部深色 */
      --bg-light: #f8fafc;            /* 浅色背景 */
      --card: #ffffff;                /* 白卡片 */
      --border: #e2e8f0;              /* 边框色 */
      --radius: 12px;
      --shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.1), 0 8px 10px -6px rgba(59, 130, 246, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(59, 130, 246, 0.1), 0 10px 10px -5px rgba(59, 130, 246, 0.04);
      --maxw: 1200px;
      --transition: all 0.3s ease;
    }
    *{box-sizing:border-box}
    html,body{margin:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;color:var(--ink);background:var(--bg-light);scroll-behavior: smooth;}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

    /* 顶部导航 */
    header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--border);transition: var(--transition);}
    header.scrolled {box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);}
    .nav{display:flex;align-items:center;justify-content:space-between;height:72px}
    .logo{display:flex;gap:10px;align-items:center;font-weight:800;letter-spacing:.3px;font-size:1.25rem;color:var(--brand-primary);}
    .logo .dot{width:12px;height:12px;background:var(--brand-gradient);border-radius:50%}
    nav ul{display:flex;gap:32px;list-style:none;margin:0;padding:0}
    nav a{font-size:15px;color:var(--ink);font-weight:500;position:relative;padding:5px 0;transition: var(--transition);}
    nav a:hover{color:var(--brand-primary);}
    nav a:after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--brand-gradient);transition: var(--transition);}
    nav a:hover:after{width:100%;}
    nav a.active{color:var(--brand-primary);}
    nav a.active:after{width:100%;}
    .cta{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:#fff;padding:10px 20px;border-radius:999px;box-shadow:0 4px 6px -1px rgba(249, 115, 22, 0.2);font-weight:500;transition: var(--transition);}
    .cta:hover{transform:translateY(-2px);background:var(--accent-hover);box-shadow:0 10px 15px -3px rgba(249, 115, 22, 0.2);}

    /* 产品中心头部 */
    .products-hero{
      background:var(--bg-dark);
      color:white;
      padding:60px 0 80px;
      position:relative;
      overflow:hidden;
    }
    .products-hero:before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.2) 0%, transparent 60%),
                  radial-gradient(circle at 70% 70%, rgba(139, 92, 246, 0.2) 0%, transparent 60%);
      z-index: 0;
    }
    .products-hero-content{
      position:relative;
      z-index:1;
      text-align:center;
      max-width:800px;
      margin:0 auto;
    }
    .products-hero h1{
      font-size:clamp(2rem, 5vw, 3rem);
      margin:0 0 16px;
      line-height:1.2;
    }
    .products-hero h1 span{
      background:var(--brand-gradient);
      -webkit-background-clip:text;
      background-clip:text;
      color:transparent;
    }
    .products-hero p{
      color:#cbd5e1;
      font-size:18px;
      margin:0 0 30px;
      line-height:1.6;
    }
    .products-filter{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:12px;
      margin-top:20px;
    }
    .filter-btn{
      padding:8px 20px;
      border-radius:999px;
      background:rgba(255,255,255,0.1);
      color:white;
      border:1px solid transparent;
      font-weight:500;
      transition:var(--transition);
      cursor:pointer;
      display:flex;
      align-items:center;
      gap:8px;
    }
    .filter-btn:hover{
      background:rgba(255,255,255,0.15);
    }
    .filter-btn.active{
      background:var(--brand-gradient);
      box-shadow:0 4px 12px rgba(59, 130, 246, 0.3);
    }

    /* 模块通用 */
    section{padding:80px 0;position:relative;}
    .section-head{max-width:700px;margin:0 auto 60px;text-align:center;}
    .section-head h2{margin:0 0 12px;font-size:clamp(1.75rem, 4vw, 2.5rem);position:relative;display:inline-block;}
    .section-head h2:after{
      content:'';
      position:absolute;
      bottom:-8px;
      left:50%;
      transform:translateX(-50%);
      width:60px;
      height:4px;
      background:var(--brand-gradient);
      border-radius:2px;
    }
    .section-desc{color:var(--muted);font-size:16px;line-height:1.6;max-width:600px;margin:0 auto;}

    /* 产品展示区 */
    .products-section{
      padding:60px 0 80px;
    }
    .product-card{
      background:var(--card);
      border-radius:var(--radius);
      overflow:hidden;
      box-shadow:var(--shadow);
      transition:var(--transition);
      margin-bottom:40px;
    }
    .product-card:hover{
      transform:translateY(-5px);
      box-shadow:var(--shadow-hover);
    }
    .product-header{
      position:relative;
      overflow:hidden;
    }
    .product-image{
      height:400px;
      overflow:hidden;
    }
    .product-image img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform 0.8s ease;
    }
    .product-card:hover .product-image img{
      transform:scale(1.03);
    }
    .product-badge{
      position:absolute;
      top:20px;
      left:20px;
      background:var(--accent);
      color:white;
      padding:6px 14px;
      border-radius:999px;
      font-weight:500;
      font-size:14px;
      box-shadow:0 4px 12px rgba(249, 115, 22, 0.3);
    }
    .product-content{
      padding:40px;
    }
    .product-title{
      margin:0 0 16px;
      font-size:clamp(1.5rem, 3vw, 2rem);
      display:flex;
      align-items:center;
      gap:12px;
    }
    .product-title i{
      color:var(--brand-primary);
      font-size:1.2em;
    }
    .product-desc{
      color:var(--muted);
      font-size:16px;
      line-height:1.7;
      margin:0 0 30px;
    }
    .product-features{
      display:grid;
      grid-template-columns:repeat(auto-fit, minmax(280px, 1fr));
      gap:20px;
      margin:0 0 30px;
    }
    .feature{
      display:flex;
      flex-direction:column;
      gap:8px;
    }
    .feature h4{
      margin:0;
      font-size:16px;
      display:flex;
      align-items:center;
      gap:8px;
    }
    .feature h4 i{
      color:var(--brand-primary);
      font-size:1.1em;
    }
    .feature p{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.6;
    }
    .product-plans{
      margin:30px 0;
      border-top:1px solid var(--border);
      padding-top:30px;
    }
    .plan-header{
      display:flex;
      justify-content:space-between;
      align-items:center;
      margin-bottom:20px;
    }
    .plan-header h3{
      margin:0;
      font-size:18px;
    }
    .plans-grid{
      display:grid;
      grid-template-columns:repeat(auto-fit, minmax(280px, 1fr));
      gap:24px;
    }
    .plan-card{
      border:1px solid var(--border);
      border-radius:var(--radius);
      padding:30px;
      transition:var(--transition);
      position:relative;
    }
    .plan-card:hover{
      border-color:var(--brand-primary);
      box-shadow:var(--shadow);
    }
    .plan-card.popular{
      border-color:var(--accent);
      background:linear-gradient(180deg, rgba(251, 146, 60, 0.03) 0%, rgba(251, 146, 60, 0) 100%);
    }
    .plan-card.popular:before{
      content:'推荐';
      position:absolute;
      top:-1px;
      right:-1px;
      background:var(--accent);
      color:white;
      padding:2px 12px;
      font-size:12px;
      font-weight:500;
      border-radius:0 var(--radius) 0 var(--radius);
    }
    .plan-title{
      font-size:18px;
      margin:0 0 10px;
    }
    .plan-price{
      font-size:28px;
      font-weight:700;
      margin:0 0 20px;
      color:var(--brand-primary);
    }
    .plan-price span{
      font-size:14px;
      font-weight:normal;
      color:var(--muted);
    }
    .plan-features{
      margin:0 0 25px;
      padding:0;
      list-style:none;
    }
    .plan-features li{
      margin-bottom:12px;
      font-size:14px;
      display:flex;
      align-items:start;
      gap:8px;
    }
    .plan-features li i{
      color:#10b981;
      margin-top:3px;
    }
    .plan-features li.disabled{
      color:var(--light-muted);
    }
    .plan-features li.disabled i{
      color:var(--light-muted);
    }
    .product-cta{
      margin-top:30px;
      display:flex;
      flex-wrap:wrap;
      gap:16px;
      align-items:center;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:14px 24px;
      border-radius:12px;
      border:1px solid transparent;
      font-weight:500;
      transition: var(--transition);
      font-size:16px;
    }
    .btn.primary{
      background:var(--accent);
      color:#fff;
    }
    .btn.primary:hover{
      background:var(--accent-hover);
      transform: translateY(-2px);
      box-shadow:0 10px 15px -3px rgba(249, 115, 22, 0.2);
    }
    .btn.secondary{
      background:transparent;
      color:var(--brand-primary);
      border-color:var(--brand-primary);
    }
    .btn.secondary:hover{
      background:var(--brand-primary);
      color:white;
      transform: translateY(-2px);
    }
    .product-cta .text{
      color:var(--muted);
      font-size:14px;
    }

    /* 产品优势 */
    .products-advantages{
      background:var(--card);
      padding:80px 0;
    }
    .advantages-grid{
      display:grid;
      grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));
      gap:30px;
      margin-top:40px;
    }
    .advantage-card{
      background:var(--bg-light);
      border-radius:var(--radius);
      padding:30px;
      box-shadow:var(--shadow);
      transition:var(--transition);
    }
    .advantage-card:hover{
      transform:translateY(-5px);
      box-shadow:var(--shadow-hover);
    }
    .advantage-icon{
      width:60px;
      height:60px;
      border-radius:12px;
      background:var(--brand-gradient);
      display:flex;
      align-items:center;
      justify-content:center;
      color:white;
      font-size:24px;
      margin-bottom:20px;
    }
    .advantage-card h3{
      margin:0 0 12px;
      font-size:18px;
    }
    .advantage-card p{
      margin:0;
      color:var(--muted);
      font-size:15px;
      line-height:1.6;
    }

    /* 客户评价 */
    .products-testimonials{
      background:var(--bg-light);
      padding:80px 0;
    }
    .testimonials-grid{
      display:grid;
      grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));
      gap:30px;
      margin-top:40px;
    }
    .testimonial-card{
      background:var(--card);
      border-radius:var(--radius);
      padding:30px;
      box-shadow:var(--shadow);
      transition:var(--transition);
    }
    .testimonial-card:hover{
      transform:translateY(-5px);
      box-shadow:var(--shadow-hover);
    }
    .testimonial-stars{
      color:#f59e0b;
      margin-bottom:15px;
      font-size:16px;
    }
    .testimonial-text{
      color:var(--ink);
      font-size:15px;
      line-height:1.7;
      margin:0 0 20px;
      font-style:italic;
    }
    .testimonial-author{
      display:flex;
      align-items:center;
      gap:12px;
    }
    .author-avatar{
      width:40px;
      height:40px;
      border-radius:50%;
      overflow:hidden;
    }
    .author-avatar img{
      width:100%;
      height:100%;
      object-fit:cover;
    }
    .author-info h4{
      margin:0 0 2px;
      font-size:15px;
    }
    .author-info p{
      margin:0;
      color:var(--muted);
      font-size:13px;
    }

    /* 常见问题 */
    .products-faq{
      background:var(--card);
      padding:80px 0;
    }
    .faq-container{
      max-width:800px;
      margin:0 auto;
    }
    .faq-item{
      border-bottom:1px solid var(--border);
      padding:20px 0;
    }
    .faq-question{
      display:flex;
      justify-content:space-between;
      align-items:center;
      cursor:pointer;
      font-weight:500;
      font-size:18px;
    }
    .faq-question i{
      color:var(--brand-primary);
      transition:var(--transition);
    }
    .faq-answer{
      max-height:0;
      overflow:hidden;
      transition:max-height 0.3s ease, padding 0.3s ease;
      color:var(--muted);
      line-height:1.6;
    }
    .faq-item.active .faq-answer{
      max-height:500px;
      padding-top:15px;
    }
    .faq-item.active .faq-question i{
      transform:rotate(180deg);
    }

    /* 咨询表单 */
    .products-cta{
      background:var(--bg-dark);
      color:white;
      padding:80px 0;
      position:relative;
      overflow:hidden;
    }
    .products-cta:before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.2) 0%, transparent 60%),
                  radial-gradient(circle at 70% 70%, rgba(139, 92, 246, 0.2) 0%, transparent 60%);
      z-index: 0;
    }
    .cta-container{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:40px;
      align-items:center;
      position:relative;
      z-index:1;
    }
    .cta-content h2{
      margin:0 0 16px;
      font-size:clamp(1.75rem, 4vw, 2.25rem);
    }
    .cta-content p{
      color:#cbd5e1;
      font-size:16px;
      line-height:1.6;
      margin:0 0 20px;
    }
    .cta-form{
      background:var(--card);
      border-radius:var(--radius);
      padding:30px;
      color:var(--ink);
      box-shadow:var(--shadow);
    }
    .form-group{
      margin-bottom:20px;
    }
    .form-group label{
      display:block;
      margin-bottom:8px;
      font-weight:500;
      font-size:14px;
    }
    .form-control{
      width:100%;
      padding:12px 16px;
      border:1px solid var(--border);
      border-radius:8px;
      font-size:15px;
      transition:var(--transition);
    }
    .form-control:focus{
      outline:none;
      border-color:var(--brand-primary);
      box-shadow:0 0 0 3px rgba(59, 130, 246, 0.1);
    }
    textarea.form-control{
      min-height:100px;
      resize:vertical;
    }
    .form-submit{
      width:100%;
      padding:14px;
      background:var(--accent);
      color:white;
      border:none;
      border-radius:8px;
      font-weight:500;
      font-size:16px;
      cursor:pointer;
      transition:var(--transition);
    }
    .form-submit:hover{
      background:var(--accent-hover);
      transform:translateY(-2px);
      box-shadow:0 10px 15px -3px rgba(249, 115, 22, 0.2);
    }

    /* 底部 */
    footer{background:var(--bg-dark);color:#e2e8f0;padding:80px 0 40px;position:relative;}
    footer:before{
      content:'';
      position:absolute;
      top:0;
      left:0;
      width:100%;
      height:8px;
      background:var(--brand-gradient);
    }
    .foot{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;}
    .foot-col h4{margin:0 0 20px;font-size:18px;color:white;position:relative;display:inline-block;}
    .foot-col h4:after{
      content:'';
      position:absolute;
      bottom:-6px;
      left:0;
      width:30px;
      height:2px;
      background:var(--accent);
    }
    .foot-col p{margin:0 0 16px;line-height:1.7;color:#94a3b8;}
    .contact-info{display:flex;align-items:center;gap:12px;margin-bottom:16px;color:#94a3b8;}
    .contact-info i{color:var(--accent);width:20px;text-align:center;}
    .social-links{display:flex;gap:12px;margin-top:20px;}
    .social-links a{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,0.1);display:flex;align-items:center;justify-content:center;color:white;transition: var(--transition);}
    .social-links a:hover{background:var(--accent);transform: translateY(-3px);}
    .foot-nav{display:flex;flex-wrap:wrap;gap:10px 20px;}
    .foot-nav a{color:#94a3b8;transition: var(--transition);}
    .foot-nav a:hover{color:white;}
    .copyright{margin-top:40px;border-top:1px solid rgba(255,255,255,.1);padding-top:24px;color:#94a3b8;font-size:14px;text-align:center;}

    /* 响应式 */
    @media (max-width: 1100px){
      .cta-container{
        grid-template-columns:1fr;
      }
      .product-features{
        grid-template-columns:1fr;
      }
    }
    @media (max-width: 768px){
      nav ul{display:none}
      .foot{grid-template-columns:1fr 1fr;}
      .section-head{
        margin-bottom:40px;
      }
      section{padding:60px 0;}
      .product-content{
        padding:30px 20px;
      }
      .product-image{
        height:300px;
      }
      .products-hero{
        padding:40px 0 60px;
      }
      .products-cta{
        padding:60px 0;
      }
      .plans-grid{
        grid-template-columns:1fr;
      }
      .product-cta{
        flex-direction:column;
        align-items:flex-start;
      }
    }
    @media (max-width: 480px){
      .foot{grid-template-columns:1fr;}
      .btn{padding:12px 20px;font-size:14px;}
      .products-hero h1{
        font-size:2rem;
      }
      .filter-btn{
        padding:6px 14px;
        font-size:14px;
      }
    }
	
	
	
	
	  .captcha-container {
    display: flex;
    gap: 10px;
    align-items: center;
  }
  
  .captcha-input {
    flex: 1;
  }
  
  .captcha-image {
    width: 120px;
    height: 40px;
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    letter-spacing: 3px;
    font-weight: bold;
    user-select: none;
    border-radius: 4px;
  }
  
  .refresh-captcha {
    padding: 8px 12px;
    background-color: #e9ecef;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
  }
  
  .refresh-captcha:hover {
    background-color: #d0d7dc;
  }