:root {
            --primary-blue: #0a66c2;
            --primary-dark: #054a8c;
            --primary-light: #eef4fc;
            --accent-blue: #2c7be5;
            --gray-light: #f8fafc;
            --gray-border: #e2e8f0;
            --text-muted: #475569;
            --shadow-sm: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
            --shadow-md: 0 20px 25px -12px rgba(0, 0, 0, 0.08);
            --transition: all 0.25s ease;
        }
        /* Hero 区域 */
        .hero {
            background: linear-gradient(105deg, #f0f7ff 0%, #ffffff 100%);
            padding: 1rem 1rem  1rem 1rem ;
            display: flex;
            align-items: center; /* 上下居中 */
            margin-top: 80px;
            margin-bottom: 40px; /* 已修复拼写错误 */
        }
        .hero-grid {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .hero-content {
            flex: 1;
        }
        .hero-badge {
            background: rgba(10,102,194,0.1);
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: 30px;
            color: var(--primary-blue);
            font-weight: 600;
            font-size: 0.8rem;
            margin-bottom: 1rem;
        }
        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: #0b2b42;
        }
        .hero-content p {
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 90%;
        }
        .btn-primary {
            background: var(--primary-blue);
            color: white;
            padding: 0.8rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 8px rgba(10,102,194,0.2);
            transition: var(--transition);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        .hero-visual {
            flex: 1;
            text-align: center;
        }
        .hero-visual i {
            font-size: 8rem;
            color: var(--primary-blue);
            opacity: 0.8;
        }

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: "Segoe UI", Roboto, sans-serif;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 150px;
}
.product-section {
  padding: 60px -10px;
}

/* 🔥 核心：一行4个，自动换行 */
.product-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.product-card {
  width: calc(25% - 18px); /* 一行4个，平分宽度 */
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  transition: all 0.3s;
  cursor: pointer;
}

/* 悬浮效果 */
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}
.product-card:hover .product-title {
  color: #2563eb; /* 蓝色 */
}

.product-img {
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.product-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.product-subtitle {
  font-size: 12px;
  color: #64748b;
  margin-bottom: 6px;
}
.product-title {
  font-size: 14px;
  font-weight: 600;
  color: #1e293b;
  transition: color 0.3s;
  line-height: 1.4;
}
/* 标题样式 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: #1e293b;
  position: relative;
  padding-bottom: 12px;
  margin-bottom: 24px;
}

/* 下面的蓝色横线 */
.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: #d1d5de;
  border-radius: 1px;
}