/* --- APAS Industrial Brand Guidelines (Premium Large-Scale Factory Style) --- */

    :root {
        --primary-color: #e31e24; /* APAS Solid Red */
        --dark-bg: #111111;
        --tech-gray-dark: #222222;
        --light-bg: #f8f9fa;
        --text-main: #2b2b2b;
        --text-muted: #666666;
        --border-color: #dddddd;
    }

    * { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
    body { color: var(--text-main); background-color: #ffffff; line-height: 1.6; }
    .container { max-width: 1320px; margin: 0 auto; padding: 0 24px; }
    
    /* Universal Technical Typo */
    section { padding: 90px 0; border-bottom: 1px solid var(--border-color); }
    .section-header { margin-bottom: 40px; }
    .section-num { font-size: 0.85rem; font-weight: 700; color: var(--primary-color); text-transform: uppercase; letter-spacing: 2px; display: block; margin-bottom: 8px; }
    .section-title { font-size: 2.5rem; font-weight: 800; color: var(--dark-bg); text-transform: uppercase; letter-spacing: -0.5px; line-height: 1.2; }
    .section-subtitle { font-size: 1.1rem; color: var(--text-muted); margin-top: 15px; max-width: 850px; }
    
    .btn-tech { display: inline-flex; align-items: center; background-color: var(--primary-color); color: #fff; padding: 14px 32px; text-decoration: none; font-size: 0.9rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; border-radius: 0; transition: background 0.2s ease; }
    .btn-tech:hover { background-color: #b71c1c; }
    .component-tag { font-size: 0.75rem; font-weight: 700; background: var(--light-bg); color: var(--tech-gray-dark); padding: 4px 12px; text-transform: uppercase; border: 1px solid var(--border-color); display: inline-block; margin-bottom: 15px; letter-spacing: 0.5px; }

    /* --- 1. Hero Banner 背景图自适应优化 --- */
    .hero { 
        background: url('//ueeshop.ly200-cdn.com/u_file/UPBG/UPBG182/2607/13/photo/10-1.png') center center / cover no-repeat; 
        padding: 120px 0 80px 0; 
        color: #fff; 
        width: 100%;
    }

    .hero-grid { 
        display: grid; 
        grid-template-columns: 1.3fr 1fr; 
        gap: 40px; 
        align-items: flex-start; 
    }

    .hero-left-space {}

    .hero-right-content {
        background: rgba(0, 0, 0, 0.75);
        border: 1px solid var(--primary-color);
        padding: 30px 35px;
        max-width: 460px;
        margin-left: auto;
        margin-right: 0;
    }

    .hero-right-content h1 { 
        font-size: 2rem; 
        font-weight: 800; 
        line-height: 1.3; 
        margin-bottom: 16px; 
        text-transform: uppercase; 
        color: #ffffff;
    }

    .hero-right-content p { 
        font-size: 0.95rem; 
        margin-bottom: 24px; 
        color: #f0f0f0; 
        line-height: 1.6;
    }

    .hero-right-content .btn-tech {
        margin-bottom: 24px;
    }

    .hero-meta { 
        border-left: 3px solid var(--primary-color); 
        padding-left: 20px; 
    }

    .hero-meta span { 
        display: block; 
        font-size: 0.7rem; 
        text-transform: uppercase; 
        color: #bbbbbb; 
        letter-spacing: 1px; 
        margin-bottom: 3px; 
    }

    .hero-meta p { 
        font-size: 0.95rem; 
        color: #fff; 
        margin: 0 0 10px 0; 
        font-weight: 700; 
        text-transform: uppercase; 
    }

    .hero-meta p:last-child {
        margin-bottom: 0;
    }
    
    /* Trust Stats Strip */
    .trust-stats-bar { background: var(--light-bg); padding: 30px 0; border-bottom: 1px solid var(--border-color); }
    .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
    .stat-item { border-right: 1px solid var(--border-color); }
    .stat-item:last-child { border-right: none; }
    .stat-item h3 { font-size: 2.2rem; font-weight: 800; color: var(--dark-bg); line-height: 1.1; }
    .stat-item h3 span { color: var(--primary-color); }
    .stat-item p { font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; font-weight: 600; margin-top: 8px; letter-spacing: 0.5px; }

    /* --- 2. Global Standards 证书图片满框适配 --- */
    .standards { background-color: #ffffff; }
    .standards-layout-grid { 
        display: grid; 
        grid-template-columns: 1fr 1fr; 
        gap: 50px; 
        margin-top: 40px; 
        align-items: stretch;
    }
    
    .standards-text-matrix { display: grid; grid-template-columns: 1fr; gap: 20px; height: 100%; }
    .standard-card-line { background: var(--light-bg); padding: 30px; border: 1px solid var(--border-color); border-left: 4px solid var(--tech-gray-dark); }
    .standard-card-line.active-ce { border-left-color: var(--primary-color); background: #fff8f8; }
    .standard-card-line h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; color: var(--dark-bg); text-transform: uppercase; display: flex; align-items: center; justify-content: space-between; }
    .standard-card-line h3 .badge-mini { font-size: 0.7rem; background: var(--primary-color); color: #fff; padding: 2px 8px; font-weight: 600; }
    .standard-card-line p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.5; }

    .ce-showcase-hub { 
        border: 1px solid var(--border-color); 
        background: #ffffff; 
        padding: 30px; 
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    .ce-header-tab { 
        border-bottom: 2px solid var(--dark-bg); 
        padding-bottom: 12px; 
        margin-bottom: 20px; 
        display: flex; 
        justify-content: space-between; 
        align-items: center; 
    }
    .ce-header-tab h4 { font-size: 0.95rem; font-weight: 800; text-transform: uppercase; color: var(--dark-bg); letter-spacing: 0.5px; }
    .ce-header-tab .doc-status { font-size: 0.75rem; font-weight: 700; color: #2e7d32; text-transform: uppercase; background: #e8f5e9; padding: 3px 10px; border: 1px solid #a5d6a7; }
    
    .ce-image-viewport { 
        background: #ffffff; 
        border: 1px solid var(--border-color); 
        flex: 1;
        display: flex; 
        align-items: center; 
        justify-content: center; 
        overflow: hidden;
        padding: 12px;
        gap: 12px;
        min-height: 360px;
    }
    .ce-cert-item {
        flex: 1;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .ce-cert-item img {
        width: 100%;
        height: 100%;
        max-width: unset;
        max-height: unset;
        object-fit: scale-down;
        object-position: center;
    }
    
    .ce-slider-dots { display: none; }
    
    .ce-tech-notes { 
        margin-top: 20px; 
        border-top: 1px dashed var(--border-color); 
        padding-top: 15px; 
        display: grid; 
        grid-template-columns: 1fr 1fr; 
        gap: 15px; 
    }
    .note-item span { font-size: 0.7rem; color: #888; text-transform: uppercase; display: block; }
    .note-item p { font-size: 0.85rem; font-weight: 700; color: var(--dark-bg); }

    /* --- 3. System Architecture Components --- */
    .anatomy { background-color: var(--light-bg); }
    .anatomy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
    .anatomy-card { background: #ffffff; border: 1px solid var(--border-color); overflow: hidden; display: flex; flex-direction: column; }
    
    .anatomy-img { 
        width: 100%; 
        flex: 0 0 auto;
        min-height: 340px;
        background-color: #ffffff;
        border-bottom: 1px solid var(--border-color); 
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
        padding: 0;
    }
    
    .anatomy-img img {
        width: 100%;
        height: 100%;
        object-fit: contain;
        object-position: center;
        display: block;
    }
    .anatomy-body { padding: 35px; flex-grow: 1; }
    .anatomy-body h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 15px; color: var(--dark-bg); }
    .anatomy-list { list-style: none; }
    .anatomy-list li { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; padding-left: 18px; position: relative; line-height: 1.5; }
    .anatomy-list li::before { content: "■"; color: var(--primary-color); position: absolute; left: 0; font-size: 0.7rem; top: 2px; }

    /* --- 4. Symmetrical Material Systems Row --- */
    .material-system { padding: 0; }
    .split-row { display: grid; grid-template-columns: 1fr 1fr; min-height: 620px; background: #fff; }
    .split-col-img { 
        background-color: #ffffff;
        background-size: scale-down;
        background-position: center;
        background-repeat: no-repeat;
        display:flex;
        align-items:center;
        justify-content:center;
        color:#888;
        font-size:16px;
        text-align:center;
        padding:0;
    }
    .split-col-content { padding: 80px 100px; display: flex; flex-direction: column; justify-content: center; }
    .split-row:nth-child(even) { direction: rtl; background-color: var(--light-bg); }
    .split-row:nth-child(even) .split-col-content { direction: ltr; }
    .split-col-content h3 { font-size: 2.2rem; font-weight: 800; margin-bottom: 20px; text-transform: uppercase; color: var(--dark-bg); }
    .split-col-content p { color: var(--text-muted); margin-bottom: 35px; font-size: 1rem; line-height: 1.6; }
    
    .matrix-box { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; border-top: 1px solid var(--border-color); padding-top: 30px; }
    .matrix-item label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; color: #888; display: block; margin-bottom: 4px; }
    .matrix-item value { font-size: 1rem; font-weight: 700; color: var(--dark-bg); display: block; }

    /* --- 5. Custom Engineering Workflow Pipeline (图片撑满板块宽度适配) --- */
    .pipeline { background-color: var(--light-bg); }
    .pipeline-img-container {
        margin-top: 40px;
        width: 100%;
        background: #ffffff;
        border: 1px solid var(--border-color);
        padding: 0;
        border-radius: 8px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        overflow: hidden;
    }
    .pipeline-img-container img {
        width: 100%;
        height: auto;
        display: block;
        object-fit: cover;
    }

    /* --- 6. Technical Table Datasheet --- */
    .datasheet { background-color: #ffffff; }
    .table-responsive { border: 1px solid var(--border-color); background: #ffffff; margin-top: 40px; box-shadow: 0 4px 15px rgba(0,0,0,0.02); }
    .tech-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.9rem; }
    .tech-table th { background-color: var(--dark-bg); color: #fff; padding: 18px 24px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; font-size: 0.8rem; }
    .tech-table td { padding: 16px 24px; border-bottom: 1px solid var(--border-color); color: var(--text-main); }
    .tech-table tr:nth-child(even) td { background-color: var(--light-bg); }
    .tech-table tr:hover td { background-color: #fff4f4; }

    /* --- 7. Call To Action Area --- */
    .cta-industrial { background: var(--primary-color); color: #fff; padding: 80px 0; position: relative; }
    .cta-box { display: flex; justify-content: space-between; align-items: center; gap: 40px; }
    .cta-text h2 { font-size: 2.2rem; font-weight: 800; text-transform: uppercase; margin-bottom: 12px; }
    .cta-text p { color: #ffffff; font-size: 1.05rem; max-width: 750px; }
    .btn-white { background: #fff; color: var(--primary-color); }
    .btn-white:hover { background: #f0f0f0; color: var(--primary-color); }

    /* Responsive 移动端适配 */
    @media (max-width: 1200px) { 
        .split-col-content { padding: 50px; }
        .ce-image-viewport { padding: 8px; gap:8px; min-height:300px; }
        .anatomy-img { min-height:280px; }
    }
    @media (max-width: 1024px) {
        .hero-grid, .standards-layout-grid, .anatomy-grid, .split-row, .pipe-grid, .stats-grid, .cta-box { grid-template-columns: 1fr !important; gap: 35px; }
        .split-row:nth-child(even) { direction: ltr; }
        .cta-box { flex-direction: column; align-items: flex-start; }
        .stat-item { border-right: none; border-bottom: 1px solid var(--border-color); padding-bottom: 15px; }
        .stat-item:last-child { border-bottom: none; padding-bottom: 0; }

        .hero-right-content {
            max-width: 100%;
            margin-left: 0;
            margin-right: 0;
        }
        .ce-image-viewport {
            flex-direction: column;
        }
    }