/* =====================================================
    RESET & GLOBAL VARS
    ===================================================== */
    *{
        margin:0;
        padding:0;
        box-sizing:border-box;
    }

    :root{
        --dark:#172128;
        --dark2:#222f37;
        --blue:#42677c;
        --accent:#2b8a3e;
        --text:#303b42;
        --muted:#7d878d;
        --light:#f3f5f6;
        --line:#e1e6e8;
        --white:#fff;
        --sidebar-width: 240px;
    }

    html{
        scroll-behavior:smooth;
    }

    body{
        font-family: Arial, Helvetica, sans-serif;
        color:var(--text);
        background:#fff;
        line-height:1.6;
        padding-left: var(--sidebar-width);
    }

    img{
        width:100%;
        height:100%;
        object-fit:cover;
        display:block;
    }

    a{
        color:inherit;
        text-decoration:none;
    }

    /* =====================================================
    SIDEBAR NAVIGATION
    ===================================================== */
    .sidebar{
        position: fixed;
        top:0;
        left:0;
        width: var(--sidebar-width);
        height: 100vh;
        background: var(--dark);
        color: #fff;
        z-index: 100;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        padding: 35px 25px;
        border-right: 1px solid rgba(255,255,255,0.08);
    }

    .sidebar-logo{
        font-size: 24px;
        font-weight: 800;
        letter-spacing: 2px;
        color: #fff;
    }

    .sidebar-logo span{
        color: #52b788;
        font-size: 10px;
        display: block;
        letter-spacing: 1px;
        margin-top: 4px;
        font-weight: 400;
    }

    .sidebar-nav{
        display: flex;
        flex-direction: column;
        gap: 16px;
        margin-top: 40px;
        margin-bottom: auto;
    }

    .sidebar-nav a{
        font-size: 13px;
        color: #96a4aa;
        letter-spacing: 0.5px;
        transition: all .3s ease;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .sidebar-nav a:hover, .sidebar-nav a.active{
        color: #fff;
        transform: translateX(4px);
    }

    .sidebar-contact-btn{
        background: var(--blue);
        color: #fff;
        text-align: center;
        padding: 12px;
        font-size: 12px;
        letter-spacing: 1px;
        text-transform: uppercase;
        border-radius: 2px;
        transition: .3s;
    }

    .sidebar-contact-btn:hover{
        background: #537d96;
    }

    /* =====================================================
    HERO SECTION
    ===================================================== */
    .hero{
        min-height:760px;
        background: linear-gradient(115deg, rgba(18,27,33,.98), rgba(42,57,66,.94));
        color:#fff;
        position:relative;
        overflow:hidden;
        display:flex;
        align-items:center;
    }

    .hero::before{
        content:"";
        position:absolute;
        width:700px;
        height:700px;
        right:-180px;
        top:50px;
        border:1px solid rgba(255,255,255,.08);
        border-radius:50%;
    }

    .hero::after{
        content:"";
        position:absolute;
        width:480px;
        height:480px;
        right:-70px;
        top:160px;
        border:1px solid rgba(255,255,255,.07);
        border-radius:50%;
    }

    .hero-inner{
        width:88%;
        max-width:1400px;
        margin:auto;
        display:grid;
        grid-template-columns:52% 48%;
        align-items:center;
        position:relative;
        z-index:2;
    }

    .hero-content{
        padding-top:20px;
    }

    .eyebrow{
        font-size:11px;
        letter-spacing:4px;
        color:#aebbc1;
        text-transform:uppercase;
        margin-bottom:20px;
    }

    .hero h1{
        font-size: clamp(40px,5vw,68px);
        line-height:1.05;
        font-weight:400;
        letter-spacing:-2px;
        max-width:700px;
    }

    .hero h1 span{
        color:#bfcbd0;
    }

    .hero-desc{
        max-width:560px;
        margin-top:25px;
        color:#c3cdd1;
        font-size:16px;
        line-height:1.8;
    }

    .hero-cta-btns{
        margin-top:30px;
        display:flex;
        gap:15px;
    }

    .btn-primary{
        background:#42677c;
        color:#fff;
        padding:12px 28px;
        font-size:13px;
        letter-spacing:1px;
        text-transform:uppercase;
        border-radius:2px;
        transition:.3s;
        display:inline-block;
    }

    .btn-primary:hover{
        background:#537d96;
    }

    .btn-outline{
        border:1px solid rgba(255,255,255,.4);
        color:#fff;
        padding:12px 28px;
        font-size:13px;
        letter-spacing:1px;
        text-transform:uppercase;
        border-radius:2px;
        transition:.3s;
        display:inline-block;
    }

    .btn-outline:hover{
        background:#fff;
        color:var(--dark);
    }

    .hero-stats{
        display:flex;
        gap:30px;
        margin-top:40px;
        flex-wrap:wrap;
    }

    .hero-stat{
        padding-left:15px;
        border-left:1px solid rgba(255,255,255,.3);
    }

    .hero-stat strong{
        display:block;
        font-size:20px;
        font-weight:400;
    }

    .hero-stat span{
        font-size:10px;
        letter-spacing:1px;
        color:#96a4aa;
    }

    .hero-image{
        height:550px;
        display:flex;
        justify-content:center;
        align-items:center;
        position:relative;
    }

    .hero-image-box{
        width:440px;
        height:440px;
        border-radius:50%;
        overflow:hidden;
        background:#172128;
        box-shadow: 0 40px 100px rgba(0,0,0,.45);
        position:relative;
        border:2px solid rgba(255,255,255,.15);
    }

    .hero-image-box img{
        width:100%;
        height:100%;
        object-fit:cover;
        object-position:center;
        transition: transform .6s ease;
    }

    .hero-image-box:hover img{
        transform: scale(1.05);
    }

    /* =====================================================
    GENERAL & SECTIONS
    ===================================================== */
    .section{
        padding:100px 6%;
    }

    .container{
        max-width:1280px;
        margin:auto;
    }

    .label{
        font-size:10px;
        letter-spacing:3px;
        text-transform:uppercase;
        color:var(--muted);
        margin-bottom:15px;
    }

    .section-title{
        font-size: clamp(34px,4vw,52px);
        font-weight:400;
        color:var(--dark);
        line-height:1.08;
        letter-spacing:-1px;
    }

    .section-title span{
        color:var(--blue);
    }

    /* INTRO */
    .intro{
        display:grid;
        grid-template-columns: 42% 58%;
        gap:70px;
        align-items:center;
    }

    .intro-image{
        height:500px;
        overflow:hidden;
        background:#e8ecee;
        position:relative;
    }

    .intro-image img{
        transition:.6s;
        object-fit:cover;
        object-position:center;
    }

    .intro-image img.pos-extruder{
        object-position: 30% center;
    }

    .intro-image:hover img{ transform:scale(1.04); }

    .intro-image::after{
        content:"HIGH PURITY CaCO3 MASTERBATCH";
        position:absolute;
        bottom:25px;
        left:25px;
        color:#fff;
        font-size:11px;
        letter-spacing:3px;
        text-shadow: 0 2px 10px rgba(0,0,0,.5);
    }

    .intro-text{
        color:#68737a;
        font-size:15px;
        line-height:1.8;
        max-width:680px;
    }

    .intro-text p + p{
        margin-top:18px;
    }

    /* =====================================================
    PRODUCTION PROCESS SECTION (已全面优化修复防跳动)
    ===================================================== */
    .process-section{
        background: var(--light);
        padding: 90px 6%;
        border-top: 1px solid var(--line);
        border-bottom: 1px solid var(--line);
    }

    .process-flow{
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 15px;
        margin-top: 45px;
        position: relative;
    }

    .process-step{
        background: #fff;
        border: 1px solid var(--line);
        padding: 20px 16px;
        position: relative;
        border-top: 3px solid var(--blue);
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        transition: transform .3s ease, box-shadow .3s ease;
        will-change: transform;
    }

    .process-step:hover{
        transform: translateY(-5px);
        box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    }

    .step-num{
        font-size: 11px;
        color: var(--blue);
        font-weight: bold;
        letter-spacing: 2px;
        margin-bottom: 6px;
    }

    .step-title{
        font-size: 15px;
        color: var(--dark);
        font-weight: bold;
        line-height: 1.3;
        min-height: 40px; /* 固化标题区域高度，防止多行混排拉扯页面 */
    }

    /* 核心优化：固定图片容器尺寸与视窗溢出隐藏 */
    .step-img-box{
        width: 100%;
        height: 130px;
        margin: 12px 0;
        overflow: hidden;
        border-radius: 2px;
        background: #eef2f4;
        position: relative;
    }

    .step-img-box img{
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        transition: transform .5s ease, opacity .3s ease;
    }

    .process-step:hover .step-img-box img{
        transform: scale(1.08);
    }

    .step-desc{
        font-size: 12px;
        color: var(--muted);
        line-height: 1.6;
    }

    .process-arrow{
        position: absolute;
        right: -12px;
        top: 50%;
        transform: translateY(-50%);
        width: 22px;
        height: 22px;
        background: var(--dark);
        color: #fff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 11px;
        z-index: 2;
        pointer-events: none;
    }

    /* =====================================================
    NUMBERS
    ===================================================== */
    .numbers{
        background:#fff;
        padding:60px 6%;
        border-bottom: 1px solid var(--line);
    }

    .number-grid{
        max-width:1280px;
        margin:auto;
        display:grid;
        grid-template-columns: repeat(4,1fr);
    }

    .number{
        padding: 10px 30px;
        border-right: 1px solid #d9dfe2;
    }

    .number:last-child{ border:none; }

    .number strong{
        display:block;
        font-size:48px;
        font-weight:400;
        color:var(--dark);
        line-height:1;
    }

    .number span{
        display:block;
        margin-top:10px;
        color:var(--muted);
        font-size:11px;
        letter-spacing:1px;
    }

    /* =====================================================
    ADVANTAGES
    ===================================================== */
    .advantages{ background:#fff; }

    .heading-row{
        max-width:1280px;
        margin:auto;
        display:flex;
        justify-content:space-between;
        align-items:flex-end;
        margin-bottom:60px;
    }

    .heading-description{
        max-width:420px;
        color:var(--muted);
        font-size:14px;
    }

    .advantages-grid{
        max-width:1280px;
        margin:auto;
        display:grid;
        grid-template-columns: repeat(4,1fr);
        border-top: 1px solid var(--line);
    }

    .advantage{
        padding: 35px 25px 35px 0;
        margin-right:25px;
        border-right: 1px solid var(--line);
    }

    .advantage:nth-child(4n){ border-right:none; }

    .advantage-number{
        color:var(--blue);
        font-size:11px;
        letter-spacing:2px;
    }

    .advantage h3{
        margin-top:20px;
        font-size:19px;
        font-weight:500;
        color:var(--dark);
    }

    .advantage p{
        margin-top:10px;
        color:var(--muted);
        font-size:13px;
        line-height:1.7;
    }

    /* =====================================================
    CALCULATOR
    ===================================================== */
    .calculator-section{
        background:#1c2830;
        color:#fff;
        padding:90px 6%;
    }

    .calc-box{
        max-width:1000px;
        margin:40px auto 0;
        background:#222f37;
        border:1px solid #334450;
        padding:40px;
        display:grid;
        grid-template-columns: 1fr 1fr;
        gap:40px;
        border-radius:4px;
    }

    .calc-inputs label{
        display:block;
        font-size:13px;
        color:#92a2ac;
        margin-bottom:8px;
        margin-top:15px;
    }

    .calc-inputs label:first-child{ margin-top:0; }

    .calc-inputs input, .calc-inputs select{
        width:100%;
        padding:10px 14px;
        background:#172128;
        border:1px solid #3d4f5c;
        color:#fff;
        font-size:14px;
        outline:none;
    }

    .calc-inputs input[type="range"]{
        padding:0;
        cursor:pointer;
    }

    .calc-result{
        background:#172128;
        padding:30px;
        display:flex;
        flex-direction:column;
        justify-content:center;
        border-left:2px solid var(--blue);
    }

    .calc-result-title{
        font-size:12px;
        letter-spacing:2px;
        color:#8a9ba5;
        text-transform:uppercase;
    }

    .calc-result-number{
        font-size:42px;
        color:#52b788;
        margin:15px 0 5px;
        font-weight:bold;
    }

    .calc-result-desc{
        font-size:13px;
        color:#b0bcC2;
        line-height:1.6;
    }

    /* =====================================================
    CONFIGURATOR
    ===================================================== */
    .config-section{
        background:var(--light);
    }

    .config-container{
        max-width:1100px;
        margin:40px auto 0;
        background:#fff;
        border:1px solid var(--line);
        padding:40px;
        display:grid;
        grid-template-columns: 60% 40%;
        gap:40px;
    }

    .config-options h4{
        font-size:15px;
        color:var(--dark);
        margin-bottom:12px;
        margin-top:20px;
    }

    .config-options h4:first-child{ margin-top:0; }

    .option-group{
        display:flex;
        flex-wrap:wrap;
        gap:10px;
        align-items: center;
    }

    .opt-btn{
        padding:8px 16px;
        border:1px solid var(--line);
        background:#fff;
        font-size:13px;
        color:var(--text);
        cursor:pointer;
        transition:.2s;
    }

    .opt-btn.active, .opt-btn:hover{
        background:var(--blue);
        color:#fff;
        border-color:var(--blue);
    }

    .custom-ratio-box{
        display: flex;
        align-items: center;
        gap: 8px;
        background: #f8fafb;
        border: 1px solid var(--line);
        padding: 6px 12px;
    }

    .custom-ratio-box input{
        width: 60px;
        padding: 4px 8px;
        border: 1px solid var(--line);
        font-size: 13px;
        outline: none;
    }

    .config-summary{
        background:var(--light);
        padding:30px;
        display:flex;
        flex-direction:column;
        justify-content:space-between;
    }

    .config-summary h3{
        font-size:18px;
        margin-bottom:15px;
        color:var(--dark);
    }

    .summary-list{
        list-style:none;
        font-size:13px;
        color:#526067;
    }

    .summary-list li{
        margin-bottom:10px;
        padding-bottom:8px;
        border-bottom:1px dashed #d0d7da;
    }

    .summary-list strong{ color:var(--dark); }

    /* =====================================================
    MODELS TABLE
    ===================================================== */
    .filter-tabs{
        display:flex;
        gap:10px;
        margin-bottom:25px;
        flex-wrap:wrap;
    }

    .filter-btn{
        padding:8px 18px;
        background:var(--light);
        border:1px solid var(--line);
        font-size:13px;
        cursor:pointer;
        transition:.3s;
    }

    .filter-btn.active, .filter-btn:hover{
        background:var(--dark);
        color:#fff;
        border-color:var(--dark);
    }

    .table-wrapper{
        overflow-x:auto;
    }

    .tech-table-models{
        width:100%;
        border-collapse:collapse;
        font-size:13px;
        text-align:left;
    }

    .tech-table-models th{
        background:var(--dark);
        color:#fff;
        padding:14px;
        font-weight:400;
    }

    .tech-table-models td{
        padding:14px;
        border-bottom:1px solid var(--line);
        color:var(--text);
    }

    .tech-table-models tr:hover{
        background:#f8fafb;
    }

    /* =====================================================
    CARRIER
    ===================================================== */
    .carrier{
        background:var(--dark);
        color:#fff;
    }

    .carrier .section-title{ color:#fff; }

    .carrier-intro{
        max-width:1280px;
        margin:auto auto 50px;
    }

    .carrier-intro p{
        margin-top:15px;
        color:#8f9ba1;
        max-width:550px;
    }

    .carrier-grid{
        max-width:1280px;
        margin:auto;
        display:grid;
        grid-template-columns: 1fr 1fr;
        gap:1px;
        background:#46535a;
    }

    .carrier-card{
        background:var(--dark);
        padding:50px;
        min-height:480px;
    }

    .carrier-card small{
        color:#87959c;
        letter-spacing:3px;
        font-size:10px;
    }

    .carrier-card h3{
        margin-top:15px;
        font-size:52px;
        font-weight:400;
    }

    .carrier-card h4{
        font-size:16px;
        font-weight:400;
        color:#d2dadd;
    }

    .carrier-card ul{
        margin-top:20px;
        list-style:none;
        color:#96a2a8;
        font-size:13px;
    }

    .carrier-card li{ margin:6px 0; }

    /* =====================================================
    FILLER RATIO EFFECT SECTION
    ===================================================== */
    .filler-effect-section{
        background: #fff;
        padding: 100px 6%;
    }

    .effect-grid{
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        margin-top: 40px;
    }

    .effect-card{
        background: var(--light);
        border: 1px solid var(--line);
        padding: 30px 22px;
        border-radius: 4px;
    }

    .effect-ratio{
        font-size: 28px;
        font-weight: bold;
        color: var(--blue);
        margin-bottom: 8px;
    }

    .effect-title{
        font-size: 16px;
        font-weight: bold;
        color: var(--dark);
        margin-bottom: 12px;
    }

    .effect-list{
        list-style: none;
        font-size: 13px;
        color: var(--muted);
    }

    .effect-list li{
        margin-bottom: 8px;
        padding-left: 14px;
        position: relative;
    }

    .effect-list li::before{
        content: "•";
        color: var(--blue);
        position: absolute;
        left: 0;
        font-weight: bold;
    }

    /* =====================================================
    APPLICATIONS SECTION
    ===================================================== */
    .applications{ background:var(--light); }

    .application-gallery{
        max-width:1280px;
        margin:50px auto 0;
        display:grid;
        grid-template-columns: 1.4fr 1fr 1fr;
        grid-template-rows: 250px 250px;
        gap:15px;
    }

    .gallery-item{
        position:relative;
        overflow:hidden;
        background:#172128;
        border-radius:4px;
        cursor: pointer;
    }

    .gallery-item.large{ grid-row:1 / 3; }

    .gallery-item img{
        transition:.6s ease;
        filter:brightness(.9);
        width:100%;
        height:100%;
        object-fit:cover;
    }

    .gallery-item:hover img{
        transform:scale(1.08);
        filter:brightness(1);
    }

    .gallery-caption{
        position:absolute;
        left:0;
        bottom:0;
        width:100%;
        padding:30px 20px 20px;
        background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0) 100%);
        color:#fff;
        font-size:18px;
        font-weight:bold;
        z-index: 2;
        transition: opacity 0.3s ease;
    }

    .gallery-item:hover .gallery-caption {
        opacity: 0;
    }

    .gallery-hover-overlay{
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(23, 33, 40, 0.88);
        color: #fff;
        padding: 30px 25px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.4s ease, visibility 0.4s ease;
        z-index: 3;
    }

    .gallery-item:hover .gallery-hover-overlay{
        opacity: 1;
        visibility: visible;
    }

    .overlay-title{
        font-size: 20px;
        font-weight: bold;
        margin-bottom: 10px;
        color: #52b788;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        padding-bottom: 8px;
    }

    .overlay-desc{
        font-size: 13px;
        line-height: 1.6;
        color: #d0dce3;
        margin-bottom: 12px;
    }

    .overlay-models{
        font-size: 11px;
        letter-spacing: 1px;
        text-transform: uppercase;
        color: #aebbc1;
        background: rgba(255, 255, 255, 0.1);
        padding: 6px 10px;
        border-radius: 2px;
        display: inline-block;
    }

    /* =====================================================
    FAQ
    ===================================================== */
    .faq-section{ background:#fff; }

    .faq-container{
        max-width:900px;
        margin:40px auto 0;
    }

    .faq-item{ border-bottom:1px solid var(--line); }

    .faq-question{
        padding:20px 0;
        font-size:16px;
        color:var(--dark);
        font-weight:500;
        cursor:pointer;
        display:flex;
        justify-content:space-between;
        align-items:center;
    }

    .faq-question::after{
        content:"+";
        font-size:20px;
        color:var(--blue);
    }

    .faq-item.active .faq-question::after{ content:"\2212"; }

    .faq-answer{
        max-height:0;
        overflow:hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        font-size:14px;
        color:var(--muted);
        line-height:1.7;
    }

    .faq-item.active .faq-answer{
        padding-bottom:20px;
        max-height:300px;
    }

    /* =====================================================
    CTA
    ===================================================== */
    .cta{
        padding:120px 6%;
        text-align:center;
        color:#fff;
        background: linear-gradient(120deg, #27363e, #151e24);
    }

    .cta h2{
        font-size: clamp(36px,4.5vw,60px);
        font-weight:400;
        line-height:1.08;
    }

    .cta p{
        max-width:600px;
        margin:20px auto 35px;
        color:#aeb9be;
        font-size:15px;
    }

    .contact-info-grid{
        display:flex;
        justify-content:center;
        gap:40px;
        margin-bottom:40px;
        font-size:14px;
        color:#c4cfd4;
        flex-wrap:wrap;
    }

    /* =====================================================
    FOOTER
    ===================================================== */
    .footer{
        background:#11181d;
        padding:28px 6%;
        color:#657178;
        font-size:11px;
        display:flex;
        justify-content:space-between;
    }

    /* =====================================================
    RESPONSIVE
    ===================================================== */
    @media(max-width:1024px){
        body{ padding-left: 0; }

        /* 侧栏手机端：吸顶跟随滚动 */
        .sidebar{
            position: -webkit-sticky;
            position: sticky;
            top: 0;
            left: 0;
            width: 100%;
            height: auto;
            flex-direction: column;
            align-items: stretch;
            justify-content: flex-start;
            padding: 14px 4% 16px;
            gap: 12px;
            border-right: none;
            border-bottom: 1px solid rgba(255,255,255,.08);
            box-shadow: 0 6px 18px rgba(0,0,0,.18);
        }

        .sidebar > div{
            width: 100%;
            display: flex;
            flex-direction: column;
        }

        /* 手机端隐藏 CLIRIK / MASTERBATCH SOLUTIONS logo */
        .sidebar-logo{ display: none; }

        /* 导航手机端：5 列 × 2 行网格，自动收纳不溢出 */
        .sidebar-nav{
            display: grid;
            grid-template-columns: repeat(12, minmax(0, 1fr));
            gap: 8px;
            margin: 14px 0 0;
        }
        .sidebar-nav a:nth-child(-n+3){ grid-column: span 4; }
        .sidebar-nav a:nth-last-child(-n+4){ grid-column: span 3; }
        .sidebar-nav a{
            justify-content: center;
            text-align: center;
            font-size: 12px;
            line-height: 1.3;
            padding: 7px 4px;
            background: rgba(255,255,255,.06);
            border-radius: 2px;
            overflow-wrap: break-word;
            word-break: break-word;
        }

        .sidebar-nav a:hover, .sidebar-nav a.active{
            transform: none;
            background: rgba(255,255,255,.16);
        }

        .sidebar-contact-btn{
            width: 100%;
            padding: 10px;
        }

        /* 锚点跳转时避开吸顶导航 */
        section[id]{ scroll-margin-top: 150px; }

        .process-flow{ grid-template-columns: 1fr; }
        .process-arrow{ display: none; }
        .effect-grid{ grid-template-columns: 1fr 1fr; }
    }

    @media(max-width:900px){
        .hero-inner, .intro, .calc-box, .config-container{ grid-template-columns:1fr; }
        .hero-image{ height:400px; }
        .hero-image-box{ width:340px; height:340px; }
        .number-grid{ grid-template-columns: 1fr 1fr; }
        .advantages-grid{ grid-template-columns:1fr 1fr; }
        .carrier-grid{ grid-template-columns:1fr; }
        .application-gallery{ grid-template-columns:1fr 1fr; grid-template-rows: repeat(3,220px); }
        .gallery-item.large{ grid-row:1 / 3; }
    }

    @media(max-width:600px){
        .section{ padding:75px 6%; }
        .sidebar{ padding: 10px 4% 12px; }
        .sidebar-nav{ gap: 6px; margin-top: 10px; }
        .sidebar-nav a{ font-size: 11px; padding: 6px 2px; }
        .hero h1{ font-size:38px; }
        .number-grid{ grid-template-columns:1fr; }
        .advantages-grid{ grid-template-columns:1fr; }
        .effect-grid{ grid-template-columns:1fr; }
        .application-gallery{ display:block; }
        .gallery-item{ height:240px; margin-bottom:15px; }
        .footer{ display:block; }
    }
    .navbar{margin-bottom: 0px!important}
    .TopDiv{display: none;}
    #dh{margin: auto!important}
    #dh.dh33{
        float: none !important;
        display: flex !important;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        width: 100%;
        margin: 0 auto !important;
        padding: 0;
        text-align: center;
    }
    
    #dh.dh33 > li{
        float: none !important;
        display: block;
        flex: 0 1 auto;
        text-align: center;
        padding: 0 12px;
    }
    @media(max-width:400px){
        .sidebar-nav{ gap: 5px; }
        .sidebar-nav a{ font-size: 10px; letter-spacing: 0; padding: 5px 1px; }
    }
    #product .container:before{display: none!important}
    @media (max-width: 900px){
        #calculator,#customization{
            display: none !important;
        }
        .sidebar-nav a[href="#calculator"],
        .sidebar-nav a[href="#customization"]{
            display: none;
        }
    }
    @media (min-width: 768px){
        .navbar-header .logo{ display: none; }
        .navbar-static-top{background-color: rgba(3, 3, 3, .6)!important;}
        .nav .na a{color: #ffffff !important;}
    }