:root {
      --brand-primary: #2563eb; /* 蓝色 */
      --brand-secondary: #7c3aed; /* 紫色 */
      --brand-dark: #1e293b;
      --brand-light: #f8fafc;
      --brand-accent: #f59e0b; /* 琥珀色 */
    }
    * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', 'Segoe UI', sans-serif; }
    body { background-color: #f8fafc; color: #334155; line-height: 1.7; }
    .container { max-width: 1280px; margin: 50px auto; padding: 0 40px; }

    /* ===== 1. 增强的HERO区域 ===== */
    .hero-section {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      margin-bottom: 100px;
      position: relative;
    }
    .hero-bg {
      position: absolute;
      width: 60%;
      height: 80%;
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
      top: -10%;
      right: -10%;
      border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
      z-index: -1;
    }
    .hero-content h1 { font-size: 3.5rem; color: var(--brand-dark); margin-bottom: 20px; line-height: 1.2; }
    .hero-tagline {
      font-size: 1.8rem; color: var(--brand-primary); font-weight: 700; margin-bottom: 25px;
      display: inline-block; padding-bottom: 10px; border-bottom: 4px solid var(--brand-accent);
    }
    .hero-cta .btn-primary {
      background: linear-gradient(to right, var(--brand-primary), var(--brand-secondary));
      color: white; padding: 18px 40px; border-radius: 12px; text-decoration: none;
      font-weight: 700; font-size: 1.1rem; display: inline-flex; align-items: center; gap: 10px;
      box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3); transition: all 0.3s;
    }
    .hero-cta .btn-primary:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(37, 99, 235, 0.4); }
    .hero-image {
      display: flex; justify-content: center; align-items: center;
    }
    .profile-img {
      width: 100%; max-width: 500px; border-radius: 20px;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); border: 8px solid white;
    }


/* ===== 2. 专长数据卡片 ===== */
.expertise-section { 
    margin-bottom: 100px; 
    overflow: visible; /* 关键：允许横线显示 */
    padding-top: 20px; /* 为横线腾出空间 */
}

/* 只修改这部分：让横线在标题内部 */
.section-title {
    text-align: center; 
    font-size: 2.8rem; 
    color: var(--brand-dark); 
    margin-bottom: 50px; /* 减少下边距，因为横线在内部了 */
    padding-bottom: 30px; /* 为横线创建内部空间 */
    position: relative; 
    display: inline-block; 
    left: 50%; 
    transform: translateX(-50%);
}

/* 关键修改：横线在padding区域内 */
.section-title:after {
    content: ''; 
    position: absolute; 
    width: 120px; 
    height: 6px;
    background: linear-gradient(to right, var(--brand-primary), var(--brand-accent));
    bottom: 10px; /* 改为正值！在padding区域内 */
    left: 50%; 
    transform: translateX(-50%); 
    border-radius: 3px;
}

/* 下面的卡片网格部分完全保持原样，不要改动！ */
.stats-grid {
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    /* 不要加 margin-top，保持原样 */
}

.stat-card {
    background: white; 
    padding: 40px 30px; 
    border-radius: 16px; 
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08); 
    transition: transform 0.3s;
    border-top: 5px solid var(--brand-primary);
}

.stat-card:hover { transform: translateY(-10px); }
.stat-card i { font-size: 3rem; color: var(--brand-primary); margin-bottom: 20px; }
.stat-card .number { font-size: 3.5rem; font-weight: 800; color: var(--brand-dark); line-height: 1; }
.stat-card .label { font-size: 1.1rem; color: #64748b; margin-top: 10px; }
    /* ===== 3. 增强的产品展示 (核心) ===== */
    .products-section { margin-bottom: 120px; }
    .products-grid {
      display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
      gap: 40px;
    }
    .product-card {
      background: white; border-radius: 20px; overflow: hidden; box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
      transition: all 0.4s ease; display: flex; flex-direction: column; height: 100%;
    }
    .product-card:hover {
      transform: translateY(-15px) scale(1.02);
      box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15);
    }
    .product-image {
      position: relative; height: 220px; width: 100%; overflow: hidden;
    }
    .product-image img {
      width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s;
    }
    .product-card:hover .product-image img { transform: scale(1.05); }
    .product-badge {
      position: absolute; background: var(--brand-accent); color: var(--brand-dark);
      padding: 8px 20px; font-weight: 700; border-radius: 0 20px 20px 0; top: 20px; left: 0;
    }
    .product-content { padding: 30px; flex-grow: 1; display: flex; flex-direction: column; }
    .product-content h3 { font-size: 1.8rem; color: var(--brand-dark); margin-bottom: 15px; }
    .product-features { margin: 20px 0; flex-grow: 1; }
    .product-features li {
      margin-bottom: 10px; padding-left: 25px; position: relative;
    }
    .product-features li:before {
      content: '✓'; position: absolute; left: 0; color: var(--brand-primary); font-weight: bold;
    }
    .product-actions {
      display: flex; gap: 15px; margin-top: 20px;
    }
    .product-actions .btn {
      flex: 1; text-align: center; padding: 14px; border-radius: 10px;
      text-decoration: none; font-weight: 600; transition: all 0.3s;
    }
    .btn-outline {
      border: 2px solid var(--brand-primary); color: var(--brand-primary);
    }
    .btn-outline:hover { background-color: var(--brand-primary); color: white; }
    .btn-solid {
      background-color: var(--brand-primary); color: white;
    }
    .btn-solid:hover { background-color: var(--brand-secondary); }

    /* ===== 4. 新增：客户评价轮播 ===== */
    .testimonials-section { margin-bottom: 120px; }
    .swiper {
      width: 100%; height: 100%; padding: 40px 10px !important;
    }
    .testimonial-slide {
      background: white; border-radius: 20px; padding: 40px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
      max-width: 800px; margin: 0 auto;
    }
    .testimonial-content {
      font-size: 1.3rem; font-style: italic; color: #475569; line-height: 1.8;
      margin-bottom: 30px; position: relative;
    }
    .testimonial-content:before {
      content: open-quote; font-size: 4rem; color: var(--brand-primary);
      opacity: 0.2; position: absolute; top: -20px; left: -10px;
    }
    .client-info { display: flex; align-items: center; gap: 20px; }
    .client-avatar { width: 70px; height: 70px; border-radius: 50%; object-fit: cover; }
    .client-details h4 { color: var(--brand-dark); margin-bottom: 5px; }
    .client-details p { color: #64748b; }

    /* ===== 5. 资源下载与最终CTA ===== */
    .resources-section {
      background: linear-gradient(135deg, var(--brand-dark) 0%, #0f172a 100%);
      color: white; padding: 80px 40px; border-radius: 30px; margin-bottom: 80px;
      text-align: center;
    }
    .resources-title { font-size: 2.5rem; margin-bottom: 20px; }
    .resources-subtitle { font-size: 1.2rem; opacity: 0.9; max-width: 1200px; margin: 0 auto 50px; }
    .resources-grid {
      display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px; margin-bottom: 50px;
    }
    .resource-card {
      background: rgba(255, 255, 255, 0.1); backdrop-filter: blur(10px);
      padding: 40px 30px; border-radius: 20px; border: 1px solid rgba(255, 255, 255, 0.2);
      transition: all 0.3s;
    }
    .resource-card:hover {
      background: rgba(255, 255, 255, 0.15); transform: translateY(-5px);
    }
    .resource-card i { font-size: 3rem; margin-bottom: 25px; color: var(--brand-accent); }
    .resource-card h4 { font-size: 1.5rem; margin-bottom: 15px; }
    .resource-card .btn-download {
      display: inline-block; margin-top: 20px; color: var(--brand-accent);
      text-decoration: none; font-weight: 600; border-bottom: 2px solid transparent;
      padding-bottom: 5px; transition: all 0.3s;
    }
    .resource-card .btn-download:hover { border-bottom: 2px solid var(--brand-accent); }
.resource-card .btn-primary{color: white;}
    /* ===== 响应式设计 ===== */
    @media (max-width: 1024px) {
      .hero-section { grid-template-columns: 1fr; text-align: center; }
      .hero-content h1 { font-size: 2.8rem; }
    }
    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .section-title { font-size: 2.2rem; }
      .products-grid { grid-template-columns: 1fr; }
      .product-actions { flex-direction: column; }
      .testimonial-slide { padding: 30px 20px; }
    }