/* Css for , Version=1774246037 */
 
        :root {
            --primary-blue: #0056b3; /* Si Atom Blue */
            --text-main: #333;
            --text-gray: #666;
            --bg-color: #ffffff;
            --chlorine-green: #2ecc71; /* Cl Atom Green */
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
            margin: 0;
            padding: 0;
            background-color: var(--bg-color);
            color: var(--text-main);
            overflow-x: hidden;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* 顶部 Header: 居中对齐 */
        header {
            text-align: center; 
            padding: 20px 20px 10px; 
        }

        .company-name {
            font-size: 1.5rem; 
            font-weight: 700;
            color: #000;
            margin-bottom: 5px;
            letter-spacing: 1px;
        }

        h1 {
            font-size: 2.2rem; 
            margin: 0;
            color: var(--primary-blue);
            letter-spacing: 1px;
        }
        
        h1 span {
            font-weight: 300;
            color: var(--primary-blue);
        }

        p.subtitle {
            font-size: 1.1rem; 
            color: var(--text-gray);
            margin-top: 10px;
            max-width: 900px;
            margin-left: auto; 
            margin-right: auto; 
            line-height: 1.5;
        }
        
        /* 确保下角标正确显示 */
        .formula sub {
            font-size: 70%;
            vertical-align: sub;
        }


        /* 主布局 Grid */
        .main-container {
            display: grid;
            grid-template-columns: 1fr 350px 1fr; 
            grid-template-rows: 1fr 1fr;
            gap: 20px;
            max-width: 1400px;
            width: 100%;
            margin: 0 auto;
            padding: 20px;
            flex: 1;
            align-items: center;
            position: relative;
        }

        /* 3D 容器 */
        #canvas-container {
            grid-column: 2 / 3;
            grid-row: 1 / 3;
            width: 100%;
            height: 400px; 
            position: relative;
            z-index: 10;
        }

        /* CSS 3D 渲染器容器 */
        .css-label-renderer {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
        }
        
        /* 交互提示 */
        .interaction-hint {
            font-size: 12px; 
            position: absolute;
            bottom: 10px;
            left: 50%;
            transform: translateX(-50%);
            color: #aaa;
            pointer-events: none;
            background: rgba(255,255,255,0.8);
            padding: 4px 10px;
            border-radius: 20px;
            z-index: 11;
        }

        /* 原子标签样式 */
        .atom-label {
            font-size: 14px; 
            color: white;
            padding: 2px 5px;
            border-radius: 4px;
            font-weight: bold;
            text-shadow: 0 0 3px rgba(0,0,0,0.5);
            pointer-events: none;
            transform: translate(-50%, -50%); 
        }

        .si-label {
            background-color: var(--primary-blue);
        }
        
        .h-label {
            background-color: #666;
            color: #eee;
        }
        
        /* 新增：氯原子标签样式 */
        .cl-label {
            background-color: var(--chlorine-green);
            color: #fff;
        }

        /* 卡片通用样式 */
        .card {
            background: #fff;
            padding: 30px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.04);
            border: 1px solid rgba(0,0,0,0.03);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            text-align: left !important;
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0,86,179,0.1);
            border-color: rgba(0,86,179,0.1);
        }

        /* 左侧边条默认在左侧 */
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary-blue);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .card:hover::before {
            opacity: 1;
        }

        .card h3 {
            font-size: 1.4rem; 
            margin: 0 0 8px 0; 
            color: var(--primary-blue);
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            flex-direction: row !important;
        }
        
        .card h3 svg {
             margin-right: 10px; /* 图标和文字之间的间距 */
             margin-left: 0;
        }


        .card svg {
            width: 20px; 
            height: 20px;
            fill: none;
            stroke: var(--primary-blue);
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .card p {
            font-size: 1.0rem; 
            line-height: 1.6;
            color: #555;
            margin: 0;
        }
        
        .tag {
            font-size: 0.9rem; 
            display: inline-block;
            margin-top: 10px;
            padding: 3px 8px; 
            background: #f0f7ff;
            color: var(--primary-blue);
            border-radius: 4px;
            font-weight: 600;
        }

        /* 布局定位 */
        .card-tl { grid-column: 1 / 2; grid-row: 1 / 2; text-align: left; }
        .card-bl { grid-column: 1 / 2; grid-row: 2 / 3; text-align: left; }
        .card-tr { grid-column: 3 / 4; grid-row: 1 / 2; text-align: left; }
        .card-br { grid-column: 3 / 4; grid-row: 2 / 3; text-align: left; }

        /* 间距统一 */
        .card-tl h3 { gap: 0.8rem; }
        .card-bl h3 { gap: 0.8rem; }
        .card-tr h3 { gap: 0.8rem; }
        .card-br h3 { gap: 0.8rem; }


        /* 响应式 */
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
                display: flex;
                flex-direction: column;
            }
            #canvas-container {
                height: 300px; 
                order: -1; 
                margin-bottom: 20px;
            }
            .card { text-align: left !important; }
            .card h3 { flex-direction: row !important; gap: 10px; }
            .card::before { left: 0 !important; right: auto !important; }
        }
        
        footer {
            font-size: 0.9rem; 
            text-align: center;
            padding: 15px;
            color: #ccc;
        }