/* ================= 1. 基础全局样式统一 ================= */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: Arial, sans-serif;
            color: #1e293b;
            background-color: #ffffff;
        }

        /* ================= 2. 轮播图模块样式 ================= */
        .hero-swiper-container {
            width: 100%;
            height: auto;
            position: relative;
            overflow: hidden;
            background-color: #000;
        }
        .swiper-slide {
            position: relative;
            width: 100%;
            aspect-ratio: 21 / 9; 
            overflow: hidden;
            cursor: pointer; /* 💡核心：鼠标移上去时，整张图都会变成可点击的手型 */
        }
        .banner-bg {
            width: 100%;
            height: 100%;
            object-fit: fill; 
            display: block;
        }
        
        .swiper-button-next, .swiper-button-prev {
            color: #ffffff;
            transform: scale(0.7);
            transition: opacity 0.3s;
            opacity: 0.5;
            z-index: 10;
        }
        .hero-swiper-container:hover .swiper-button-next,
        .hero-swiper-container:hover .swiper-button-prev { opacity: 1; }
        .swiper-pagination-bullet-active { background: #ffffff !important; }
        .swiper-pagination { z-index: 10 !important; }

        /* ================= 3. 下方主内容模块样式 ================= */
        .homepage-content-wrapper {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .section-video-intro { text-align: center; padding: 40px 0 30px 0; }
        .main-title { color: #0f172a; font-size: 40px; font-weight: 900; margin: 0 0 16px 0; text-transform: uppercase; letter-spacing: 0.5px; line-height: 1.2; }
        .sub-title { color: #3598db; font-size: 18px; font-weight: bold; margin: 0 auto 30px auto; max-width: 900px; line-height: 1.4; text-transform: uppercase; letter-spacing: 1px; }
        
        .video-box { width: 100%; max-width: 850px; margin: 0 auto 40px auto; box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12); border-radius: 16px; overflow: hidden; border: 1px solid #e2e8f0; }
        .video-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; }
        .video-container iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }

        /* 四列数据网格 */
        .stats-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; margin-bottom: 60px; text-align: center; }
        .stats-card { flex: 1; min-width: 200px; background: #0f172a; border-radius: 12px; padding: 20px; color: #ffffff; }
        .stats-num { color: #3598db; font-size: 32px; font-weight: 900; margin-bottom: 4px; }
        .stats-label { color: #94a3b8; font-size: 12px; font-weight: bold; text-transform: uppercase; }

        .section-header { text-align: center; margin-bottom: 35px; }
        .section-h2 { color: #0f172a; font-size: 28px; font-weight: bold; margin: 0; }
        .section-p { color: #64748b; font-size: 15px; margin: 8px 0 0 0; }

        /* 两列硬件卡片 */
        .hardware-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 30px; margin-bottom: 60px; }
        .hardware-card { flex: 1; min-width: 45%; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 12px; padding: 30px; border-left: 5px solid #3598db; }
        .card-h3 { color: #0f172a; font-size: 20px; font-weight: bold; margin: 0 0 12px 0; }
        .card-p { color: #475569; font-size: 14px; line-height: 1.6; margin: 0 0 16px 0; }
        .card-a { color: #3598db; font-size: 14px; font-weight: bold; text-decoration: none; }

        /* 灰色服务容器块 */
        .services-grey-section { background: #f1f5f9; border-radius: 16px; padding: 45px; margin-bottom: 60px; }
        .services-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 30px; }
        .service-white-card { flex: 1; min-width: 45%; background: #ffffff; padding: 30px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.02); }
        .btn-blue { display: inline-block; padding: 12px 24px; background: #3598db; color: #ffffff; text-decoration: none; font-weight: bold; border-radius: 6px; font-size: 14px; }
        .btn-dark { display: inline-block; padding: 12px 24px; background: #0f172a; color: #ffffff; text-decoration: none; font-weight: bold; border-radius: 6px; font-size: 14px; }

        /* 底部转化区 */
        .footer-cta { text-align: center; padding: 20px 0 50px 0; border-top: 1px solid #e2e8f0; }
        .cta-h2 { color: #0f172a; font-size: 30px; font-weight: 800; margin: 0 0 12px 0; }
        .cta-p { color: #64748b; font-size: 15px; margin: 0 auto 30px auto; max-width: 600px; }
        .btn-pill { display: inline-block; padding: 15px 40px; background-color: #3598db; color: #ffffff; font-size: 15px; font-weight: bold; text-decoration: none; border-radius: 50px; box-shadow: 0 8px 20px rgba(53, 152, 219, 0.3); text-transform: uppercase; }

        /* ================= 4. 📱 移动端自适应完美统一适配 ================= */
        @media (max-width: 768px) {
            .swiper-slide {
                aspect-ratio: 16 / 10; 
            }
            .main-title { font-size: 28px; }
            .sub-title { font-size: 15px; }
            .stats-card { flex: none; width: 47%; margin-bottom: 10px; } 
            .hardware-card, .service-white-card { flex: none; width: 100%; } 
            .services-grey-section { padding: 20px; }
            .cta-h2 { font-size: 24px; }
        }

        @media (max-width: 480px) {
            .stats-card { width: 100%; } 
        }