:root{
      --primary:#3d6df2;
      --primary-2:#6f5cff;
      --primary-soft:#eef4ff;
      --ink:#16243b;
      --muted:#66748b;
      --bg:#f5f8fc;
      --surface:#fff;
      --line:#e7ebf3;
      --dark:#101a2b;
      --success:#1fb981;
      --warning:#f4a524;
      --danger:#e24b6a;
      --shadow:0 18px 50px rgba(22,36,59,.09);
      --shadow-sm:0 10px 28px rgba(22,36,59,.07);
      --shadow-premium:0 24px 60px rgba(23,43,82,.11);
      --container:1160px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"Plus Jakarta Sans",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      color:var(--ink);
      background:
        radial-gradient(circle at 88% 6%,rgba(61,109,242,.09),transparent 22%),
        radial-gradient(circle at 8% 38%,rgba(111,92,255,.055),transparent 24%),
        var(--bg);
      line-height:1.55;
      overflow-x:hidden;
      -webkit-font-smoothing:antialiased;
    }
    h1,h2,h3,h4,.brand,.price{font-family:"Poppins","Plus Jakarta Sans",sans-serif}
    a{text-decoration:none;color:inherit}
    button,input,select,textarea{font:inherit}
    .container{width:min(calc(100% - 32px),var(--container));margin:auto}
    .btn{
      min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:0 17px;border:1px solid transparent;border-radius:12px;
      font-size:12px;font-weight:750;cursor:pointer;transition:.2s ease
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{
      color:#fff;background:linear-gradient(135deg,#315fdc,#6f5cff);
      box-shadow:0 11px 24px rgba(61,109,242,.21),0 0 25px rgba(111,92,255,.08)
    }
    .btn-light{background:#fff;border-color:var(--line);color:#33415c}
    .status-dot{
      width:8px;height:8px;border-radius:50%;display:inline-block;background:#20c98a;
      box-shadow:0 0 0 5px rgba(32,201,138,.10)
    }

    /* header */
    .topbar{background:rgba(255,255,255,.9);border-bottom:1px solid rgba(230,234,243,.8)}
    .topbar-inner{
      min-height:40px;display:flex;align-items:center;justify-content:space-between;
      gap:15px;font-size:12px;color:#52617a;font-weight:600
    }
    .topbar-group{display:flex;align-items:center;gap:18px}
    .nav-area{
      position:sticky;top:0;z-index:60;padding:8px 0 0;
      background:linear-gradient(180deg,rgba(245,248,252,.96),rgba(245,248,252,.72),transparent);
      backdrop-filter:blur(13px)
    }
    .navbar{
      min-height:68px;background:#fff;border:1px solid rgba(229,233,241,.85);
      border-radius:17px;box-shadow:0 16px 42px rgba(22,36,59,.08),0 0 0 1px rgba(61,109,242,.025);
      display:flex;align-items:center;justify-content:space-between;gap:25px;
      padding:0 17px 0 21px;position:relative
    }
    .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:21px;letter-spacing:-.7px}
    .brand-mark{
      width:36px;height:36px;border-radius:11px;display:grid;place-items:center;color:#fff;
      background:linear-gradient(135deg,#12233d,#284e8a 48%,#557df6);
      box-shadow:0 10px 22px rgba(29,63,119,.22),0 0 24px rgba(61,109,242,.15)
    }
    .brand strong{
      background:linear-gradient(135deg,#376eea,#705cff);
      -webkit-background-clip:text;background-clip:text;color:transparent
    }
    .nav-links{display:flex;align-items:center;gap:21px;font-size:12px;font-weight:650;color:#3c4963}
    .nav-links a{display:flex;align-items:center;gap:7px}
    .nav-icon{
      width:23px;height:23px;border-radius:8px;background:#eef4ff;color:#3d6df2;
      display:grid;place-items:center;font-size:10px
    }
    .nav-actions{display:flex;gap:8px}
    .menu-btn{
      display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
      background:#fff;color:#1c2c45;cursor:pointer
    }
    .mobile-menu{
      display:none;position:absolute;top:calc(100% + 10px);left:0;right:0;
      background:rgba(255,255,255,.98);border:1px solid var(--line);border-radius:18px;
      box-shadow:0 20px 50px rgba(22,36,59,.15);padding:10px
    }
    .mobile-menu.open{display:block}
    .mobile-menu a{min-height:50px;display:flex;align-items:center;gap:10px;padding:0 12px;border-radius:11px;font-size:12px;font-weight:650}
    .mobile-menu a:hover{background:#f1f5ff;color:#315fdc}

    /* breadcrumb */
    .crumbs{padding:22px 0 0}
    .crumb-list{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:11px;color:#738098;font-weight:600}
    .crumb-list i{font-size:8px}

    /* order shell */
    .order-page{padding:28px 0 64px}
    .order-grid{
      display:grid;
      grid-template-columns:.92fr 1.08fr;
      gap:18px;
      align-items:start
    }

    /* left product card */
    .product-card{
      background:linear-gradient(145deg,#fff,#fbfcff);
      border:1px solid var(--line);
      border-radius:26px;
      padding:24px;
      box-shadow:var(--shadow-premium);
      position:sticky;
      top:98px;
      overflow:hidden
    }
    .product-card:before{
      content:"";position:absolute;width:330px;height:330px;right:-160px;top:-180px;border-radius:50%;
      background:radial-gradient(circle,rgba(61,109,242,.15),transparent 68%);
      pointer-events:none
    }
    .product-head{display:flex;align-items:center;gap:14px;position:relative;z-index:2}
    .platform-logo{
      width:62px;height:62px;border-radius:19px;display:grid;place-items:center;color:#fff;font-size:27px;
      background:linear-gradient(135deg,#feda75 0%,#d62976 45%,#4f5bd5 100%);
      box-shadow:0 12px 28px rgba(91,76,196,.22)
    }
    .product-head small{
      display:inline-flex;align-items:center;gap:5px;color:#315fdc;font-size:9px;font-weight:800;
      text-transform:uppercase;letter-spacing:.7px
    }
    .product-head h1{font-size:23px;line-height:1.25;margin:4px 0 0;letter-spacing:-.6px}
    .product-price-box{
      margin:20px 0 16px;
      display:flex;align-items:end;justify-content:space-between;gap:16px;
      border-top:1px solid #edf1f6;border-bottom:1px solid #edf1f6;
      padding:16px 0;position:relative;z-index:2
    }
    .price{font-size:34px;font-weight:800;letter-spacing:-1.2px}
    .price small{font-size:10px;color:#7b879b;font-family:"Plus Jakarta Sans";font-weight:650}
    .availability{
      display:flex;align-items:center;gap:7px;font-size:9px;font-weight:750;color:#19805f
    }
    .product-meta{
      display:grid;grid-template-columns:repeat(2,1fr);gap:9px;margin-bottom:16px
    }
    .meta-card{
      background:#f7f9fd;border:1px solid #edf1f6;border-radius:13px;padding:11px
    }
    .meta-card i{
      width:27px;height:27px;border-radius:9px;background:#eef4ff;color:#315fdc;
      display:grid;place-items:center;font-size:10px;margin-bottom:7px
    }
    .meta-card b{display:block;font-size:10px}
    .meta-card span{font-size:8.4px;color:#7a879d;font-weight:600}
    .feature-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
    .feature-list li{
      display:flex;align-items:center;gap:8px;font-size:10.2px;color:#56647c;font-weight:600
    }
    .feature-list i{color:#1fb981;font-size:9px}
    .product-note{
      margin-top:17px;padding:13px;border-radius:13px;background:#eef4ff;border:1px solid #dce7ff;
      color:#53637d;font-size:9.5px;line-height:1.7
    }


    .live-sync{
      transition:opacity .16s ease,transform .16s ease;
    }
    .live-sync.updating{
      opacity:.35;
      transform:translateY(3px);
    }

    /* right form */
    .order-card{
      background:#fff;border:1px solid var(--line);border-radius:26px;padding:24px;
      box-shadow:0 16px 42px rgba(22,36,59,.07)
    }
    .order-title{
      display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
      padding-bottom:17px;border-bottom:1px solid #eef1f6;margin-bottom:18px
    }
    .order-title h2{font-size:21px;margin:0 0 4px;letter-spacing:-.5px}
    .order-title p{margin:0;font-size:11px;color:#6d7a90;font-weight:600}
    .step-badge{
      flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;
      background:#eef4ff;color:#315fdc;font-size:9px;font-weight:800
    }

    .form-group{margin-bottom:15px}
    .form-label{
      display:flex;align-items:center;justify-content:space-between;gap:12px;
      margin:0 0 7px;font-size:10px;font-weight:800;color:#3c4a63
    }
    .form-label span:last-child{font-size:8px;color:#8a95a8;font-weight:650}
    .input-wrap{position:relative}
    .input-wrap i{
      position:absolute;left:14px;top:50%;transform:translateY(-50%);
      color:#6e7c95;font-size:11px
    }
    .input-wrap input,
    .input-wrap select,
    .input-wrap textarea{
      width:100%;border:1px solid #dfe5ef;background:#fbfcfe;color:#2c3a54;
      border-radius:13px;outline:none;transition:.2s ease;font-weight:650;font-size:11px
    }
    .input-wrap input,.input-wrap select{height:50px;padding:0 14px 0 38px}
    .input-wrap textarea{min-height:104px;padding:13px 14px 13px 38px;resize:vertical}
    .input-wrap textarea + i{top:18px;transform:none}
    .input-wrap input:focus,
    .input-wrap select:focus,
    .input-wrap textarea:focus{
      border-color:#bfcfff;background:#fff;box-shadow:0 0 0 4px rgba(61,109,242,.07)
    }
    .help-text{font-size:8.8px;color:#7a879c;margin-top:6px;line-height:1.6}

    .quantity-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
    .quantity-option{
      min-height:48px;border:1px solid #e3e8f1;background:#f8faff;border-radius:12px;
      font-size:10px;font-weight:750;color:#5a6880;cursor:pointer;transition:.2s ease
    }
    .quantity-option:hover,.quantity-option.active{
      background:#eef4ff;border-color:#cbd9ff;color:#315fdc;box-shadow:0 8px 18px rgba(61,109,242,.08)
    }

    /* summary */
    .summary-box{
      margin-top:20px;border:1px solid #dfe6f3;border-radius:18px;overflow:hidden;background:#fbfcff
    }
    .summary-head{
      padding:13px 15px;background:linear-gradient(90deg,#eef4ff,#f5f2ff);
      display:flex;align-items:center;justify-content:space-between;font-size:10px;font-weight:800;color:#35435d
    }
    .summary-body{padding:14px 15px;display:grid;gap:10px}
    .summary-row{
      display:flex;align-items:center;justify-content:space-between;gap:18px;font-size:9.8px;color:#65728a;font-weight:600
    }
    .summary-row strong{color:#263550;font-weight:750}
    .summary-total{
      margin-top:2px;padding-top:12px;border-top:1px dashed #dce3ef;
      display:flex;align-items:end;justify-content:space-between;gap:16px
    }
    .summary-total span{font-size:10px;color:#5d6b84;font-weight:700}
    .summary-total b{font-family:"Poppins";font-size:24px;color:#2f5ed4;letter-spacing:-.7px}

    .agreement{
      margin:14px 0;display:flex;align-items:flex-start;gap:9px
    }
    .agreement input{margin-top:2px;accent-color:#315fdc}
    .agreement label{font-size:9px;color:#6e7a91;line-height:1.6;font-weight:600}
    .agreement a{color:#315fdc;font-weight:750}
    .order-submit{width:100%;min-height:52px;border-radius:14px;font-size:11px}
    .secure-row{
      display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;
      margin-top:13px;color:#7b879b;font-size:8.5px;font-weight:650
    }
    .secure-row span{display:flex;align-items:center;gap:5px}
    .secure-row i{color:#315fdc}

    /* detail accordions */
    .detail-section{margin-top:18px}
    .accordion{
      background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;margin-top:8px;
      box-shadow:0 8px 22px rgba(22,36,59,.035)
    }
    .accordion-btn{
      width:100%;min-height:52px;border:0;background:#fff;padding:0 15px;
      display:flex;align-items:center;justify-content:space-between;gap:14px;
      text-align:left;font-size:10.5px;font-weight:750;color:#35435d;cursor:pointer
    }
    .accordion-btn span:first-child{display:flex;align-items:center;gap:9px}
    .accordion-btn i:first-child{
      width:28px;height:28px;border-radius:9px;background:#eef4ff;color:#315fdc;display:grid;place-items:center
    }
    .accordion-content{display:none;padding:0 15px 14px;font-size:9.5px;line-height:1.75;color:#68768e}
    .accordion.open .accordion-content{display:block}

    /* support strip */
    .support-strip{
      margin-top:22px;
      background:linear-gradient(135deg,#162b4b,#315fdc 56%,#6f5cff);
      border-radius:20px;padding:18px 20px;color:#fff;
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      box-shadow:0 18px 38px rgba(42,77,156,.16)
    }
    .support-copy{display:flex;align-items:center;gap:12px}
    .support-icon{
      width:42px;height:42px;border-radius:13px;background:rgba(255,255,255,.14);
      display:grid;place-items:center;font-size:16px;border:1px solid rgba(255,255,255,.14)
    }
    .support-strip h3{font-size:13px;margin:0 0 2px}
    .support-strip p{font-size:8.8px;margin:0;color:#dce6ff}
    .support-strip .btn{background:#fff;color:#315fdc}

    /* side decorations wide screens */
    .side-decor{
      position:fixed;top:50%;transform:translateY(-50%);z-index:8;display:grid;gap:10px;pointer-events:none
    }
    .side-decor.left{left:18px}.side-decor.right{right:18px}
    .side-icon{
      width:46px;height:46px;border-radius:14px;background:rgba(255,255,255,.84);
      border:1px solid rgba(221,229,243,.9);backdrop-filter:blur(16px);
      box-shadow:0 16px 38px rgba(22,36,59,.08);
      display:grid;place-items:center;font-size:15px
    }
    .side-pill{
      width:145px;border-radius:16px;background:rgba(255,255,255,.84);
      border:1px solid rgba(221,229,243,.9);backdrop-filter:blur(16px);
      box-shadow:0 16px 38px rgba(22,36,59,.08);padding:10px 11px;
      display:flex;gap:9px;align-items:center
    }
    .side-pill i{
      width:31px;height:31px;border-radius:10px;background:#eef4ff;color:#315fdc;display:grid;place-items:center;flex:0 0 auto
    }
    .side-pill b{display:block;font-size:9.5px}
    .side-pill span{display:block;font-size:7.7px;color:#7b879c;margin-top:2px;font-weight:600}

    /* footer */
    footer{background:#101a2b;color:#b8bfd2;margin-top:60px;padding:26px 0 17px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px;padding-bottom:22px;border-bottom:1px solid rgba(255,255,255,.07)}
    .foot-title{color:#fff;font-size:11px;font-weight:700;margin-bottom:9px;padding-left:9px;border-left:3px solid #416ff2}
    .foot-links{display:grid;gap:6px}
    .foot-links a{font-size:10px;background:#17243a;border-radius:9px;padding:7px 9px;color:#c0c8d8;font-weight:600}
    .foot-copy{font-size:10.4px;color:#9aa5b8;max-width:330px;margin-top:11px;font-weight:600}
    .footer-bottom{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;padding-top:13px;font-size:9px;color:#8d98aa;font-weight:600}

    @media(max-width:1380px){
      .side-decor{display:none}
    }
    @media(max-width:1000px){
      .nav-links{display:none}
      .menu-btn{display:grid;place-items:center}
      .order-grid{grid-template-columns:1fr}
      .product-card{position:relative;top:auto}
      .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
    }
    @media(max-width:700px){
      .container{width:min(calc(100% - 24px),var(--container))}
      .topbar{display:none}
      .nav-area{padding-top:6px}
      .navbar{min-height:61px;border-radius:15px;padding:0 10px 0 13px}
      .brand{font-size:18px}
      .brand-mark{width:34px;height:34px}
      .nav-actions .btn{display:none}
      .crumbs{padding-top:15px}
      .crumb-list{font-size:10px}
      .order-page{padding-top:20px}
      .order-grid{gap:12px}
      .product-card,.order-card{padding:18px;border-radius:20px}
      .platform-logo{width:54px;height:54px;border-radius:17px;font-size:23px}
      .product-head h1{font-size:19px}
      .price{font-size:28px}
      .product-meta{grid-template-columns:1fr 1fr}
      .order-title h2{font-size:18px}
      .order-title p{font-size:10px}
      .quantity-grid{grid-template-columns:repeat(2,1fr)}
      .form-label{font-size:9.5px}
      .input-wrap input,.input-wrap select{height:48px}
      .summary-total b{font-size:21px}
      .support-strip{flex-direction:column;align-items:flex-start}
      .support-strip .btn{width:100%}
      .footer-grid{grid-template-columns:1fr;gap:18px}
      .footer-bottom{flex-direction:column}
    }
    @media(max-width:390px){
      .product-head{align-items:flex-start}
      .product-price-box{align-items:flex-start;flex-direction:column}
      .product-meta{grid-template-columns:1fr}
      .quantity-grid{grid-template-columns:1fr 1fr}
    }