* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', sans-serif;
            background-color: #f0f5fe;
            color: #0b1c33;
            line-height: 1.5;
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
        }
          .sl-banner{
            width: 100%;
            height: 671px;
            background: url(../images/sdwan.png) no-repeat;
                background-position: 50%;
    background-size: cover;
        }  
        .sl-banCon {
            box-sizing: border-box;
            padding-top: 240px;
        }
        .sl-banCon>h1 {
            font-size: 36px;
            color: #fff;
            font-weight: bold;
        }
        .sl-banCon>p {
            font-size: 22px;
            margin: 30px 0px 50px;
            color: #fff;
            width: 600px;
            line-height: 30px;
        }
        .btn-lg {
            padding: 1rem 2rem;
            font-size: 1.125rem;
            font-weight: 600;
        }
        .btn-primary {
            background: linear-gradient(135deg, #2f54eb 0%, #1d39c4 100%);
            color: #fff;
            box-shadow: 0 4px 16px rgba(47, 84, 235, 0.2);
            border: 1px solid #2f54eb;
        }
        .sl-banCon .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border-radius: 0.5rem;
            text-decoration: none;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            white-space: nowrap;
            user-select: none;
            outline: none;
        }
        .grid-bg {
            background-image: 
                linear-gradient(rgba(0, 110, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 110, 255, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
        }

        /* Hero 区域 */
        .hero {
            padding: 70px 0 40px 0;
            position: relative;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: -10%;
            right: -5%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 162, 255, 0.07) 0%, rgba(0, 70, 140, 0.02) 70%);
            border-radius: 50%;
            z-index: -1;
        }

        .hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }

        .hero-text {
            flex: 1 1 450px;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 102, 255, 0.12);
            color: #0047b3;
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.5px;
            padding: 6px 18px;
            border-radius: 40px;
            margin-bottom: 24px;
            border: 1px solid rgba(0, 102, 255, 0.25);
            backdrop-filter: blur(4px);
        }

        .hero h1 {
            font-size: 3.8rem;
            font-weight: 700;
            line-height: 1.1;
            letter-spacing: -1.5px;
            background: linear-gradient(135deg, #002a66, #10428b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 24px;
        }

        .hero .highlight {
            background: linear-gradient(120deg, #0066ff, #4d94ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: #2a4070;
            max-width: 620px;
            margin-bottom: 32px;
            border-left: 4px solid #0066ff;
            padding-left: 24px;
            background: rgba(255,255,255,0.5);
            backdrop-filter: blur(4px);
            border-radius: 0 12px 12px 0;
        }

        .hero-stats {
            display: flex;
            gap: 40px;
        }

        .stat-item {
            display: flex;
            flex-direction: column;
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: #002866;
        }

        .stat-label {
            font-size: 0.9rem;
            color: #4f6390;
        }

        .hero-visual {
            flex: 1 1 380px;
            background: radial-gradient(circle at 30% 30%, #ffffff, #e1edff);
            border-radius: 40px;
            padding: 20px;
            box-shadow: 0 40px 70px -20px rgba(0,70,150,0.25);
            border: 1px solid rgba(255,255,255,0.7);
            backdrop-filter: blur(8px);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .globe-simplified {
            width: 100%;
            aspect-ratio: 1.2 / 1;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 320" fill="none"><circle cx="200" cy="150" r="90" stroke="%230066ff" stroke-width="2" stroke-dasharray="6 4" fill="%23e5f0ff"/><circle cx="200" cy="150" r="50" stroke="%230044bb" stroke-width="1.5" fill="none"/><circle cx="200" cy="150" r="20" fill="%230066ff" opacity="0.2"/><path d="M130 100 L270 200 M270 100 L130 200" stroke="%230066ff" stroke-width="1.5" opacity="0.5"/><circle cx="140" cy="120" r="6" fill="%230066ff"/><circle cx="260" cy="180" r="6" fill="%230066ff"/><text x="110" y="70" fill="%23333333" font-size="10">HKIX 20G</text><text x="250" y="220" fill="%23333333" font-size="10">SIX</text></svg>') no-repeat center;
            background-size: contain;
        }

        /* 专线容量卡片网格 (深圳~香港等) */
        .capacity-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
            margin: 50px 0;
        }

        .capacity-card {
            background: #ffffffd9;
            backdrop-filter: blur(8px);
            border-radius: 32px;
            padding: 28px 20px;
            border: 1px solid #b9d6ff;
            text-align: center;
            transition: 0.2s;
            box-shadow: 0 20px 30px -15px #1f56b0;
        }
        .capacity-card:hover {
            background: white;
            border-color: #0066ff;
        }
        .capacity-card .route {
            font-size: 1.4rem;
            font-weight: 600;
            color: #002866;
            margin-bottom: 12px;
        }
        .capacity-card .bandwidth {
            font-size: 2.2rem;
            font-weight: 700;
            color: #0066ff;
        }
        .capacity-card .unit {
            font-size: 1rem;
            color: #4f6390;
        }

        /* 全球传输网络区块 (带数据列表) */
        .global-transport {
            background: #ffffffcc;
            backdrop-filter: blur(8px);
            border-radius: 56px;
            padding: 50px;
            margin: 60px 0;
            border: 1px solid white;
        }
        .transport-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px,1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .transport-item {
            background: #f0f7ff;
            border-radius: 32px;
            padding: 24px;
            border: 1px solid #c1dbff;
        }
        .transport-item i {
            font-size: 2rem; color: #0066ff; margin-bottom: 12px;
        }
        .transport-item .location {
            font-weight: 700; font-size: 1.2rem;
        }
        .transport-item .capacity {
            font-size: 1.6rem; font-weight: 600; color: #0044aa;
        }

        /* 节点统计 (20+ 200+) */
        .node-showcase {
            display: flex; flex-wrap: wrap; gap: 30px; margin: 60px 0;
        }
        .node-card {
            flex: 1 1 250px;
            background: linear-gradient(145deg, #0a2349, #123a6b);
            color: white;
            border-radius: 48px;
            padding: 40px;
            box-shadow: 0 30px 40px -20px #0f3460;
        }
        .node-card .big-number {
            font-size: 5rem; font-weight: 700; line-height: 1;
            background: linear-gradient(120deg, #fff, #b3d9ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .node-card .label {
            font-size: 1.4rem; margin-top: 16px;
        }

        .spec-list-2col {
            display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin: 40px 0;
        }

        /* 安全合规底部条 */
        .trust-strip {
            background: #00245e; color: white; border-radius: 60px; padding: 50px;
            margin: 70px 0; background-image: radial-gradient(circle at 70% 30%, #1f4a9e, #001b40);
        }

        .footer-note {
            border-top: 1px solid #99bbff; padding: 30px 0 40px;
            display: flex; justify-content: space-between; color: #2f4680; flex-wrap: wrap;
        }

        @media (max-width:700px){
            .container{padding:0 24px;}
            .hero h1{font-size:2.8rem;}
        }