:root{
      --primary:#0B3D91;
      --primary-dark:#06275f;
      --primary-soft:#eaf1ff;
      --accent:#24d37f;
      --ink:#122038;
      --muted:#647188;
      --line:#dfe6f1;
      --surface:#ffffff;
      --surface-alt:#f5f8fc;
      --shadow:0 18px 48px rgba(13,35,70,.12);
      --radius:18px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--surface);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
      line-height:1.65;
    }
    body.drawer-locked{overflow:hidden}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dce8ff;
      background:#061b3d;
      border-bottom:1px solid rgba(255,255,255,.08);
      font-size:13px;
    }
    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-contact{display:flex;align-items:center;gap:22px}
    .topbar a{transition:color .2s ease}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 18px rgba(14,35,67,.05);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:28px;
    }
    .logo{
      display:inline-flex;
      align-items:center;
      flex:0 0 auto;
      gap:10px;
      color:var(--primary-dark);
      font-size:19px;
      font-weight:800;
      letter-spacing:.01em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .main-nav{align-self:stretch;flex:1;min-width:0}
    .nav-list{
      height:100%;
      margin:0;
      padding:0;
      display:flex;
      align-items:stretch;
      justify-content:center;
      gap:2px;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }
    .nav-link{
      height:100%;
      padding:0 12px;
      display:flex;
      align-items:center;
      color:#253551;
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link{
      color:var(--primary);
      background:#f5f8ff;
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin-left:7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg) translateY(-2px);
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:0;
      z-index:60;
      visibility:hidden;
      opacity:0;
      transform:translateY(8px);
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 16px 16px;
      box-shadow:var(--shadow);
      transition:opacity .2s ease,transform .2s ease,visibility .2s;
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      left:0;
      right:0;
      top:-10px;
      height:10px;
    }
    .nav-item:hover>.dropdown-panel,
    .nav-item:focus-within>.dropdown-panel,
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      transform:translateY(0);
    }
    .dropdown-panel{
      width:310px;
      padding:10px;
    }
    .dropdown-panel>a:not(.dropdown-footer){
      display:block;
      padding:10px 12px;
      color:#34445e;
      border-radius:9px;
      font-size:14px;
    }
    .dropdown-panel>a:not(.dropdown-footer):hover{color:var(--primary);background:var(--primary-soft)}
    .dropdown-footer,
    .mega-footer{
      display:block;
      margin-top:8px;
      padding:11px 12px;
      color:var(--primary);
      background:#f2f6ff;
      border-radius:9px;
      font-size:13px;
      font-weight:800;
      text-align:center;
    }
    .mega-menu{
      width:650px;
      padding:20px;
    }
    .mega-wide{width:760px}
    .nav-item:nth-last-child(-n+3) .mega-menu{left:auto;right:0}
    .mega-title{
      margin:0 0 12px;
      color:#263752;
      font-size:13px;
      font-weight:800;
      letter-spacing:.05em;
    }
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:10px;
    }
    .mega-card{
      min-width:0;
      padding:10px;
      display:flex;
      align-items:center;
      gap:11px;
      border:1px solid #e8edf5;
      border-radius:12px;
      transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
    }
    .mega-card:hover{
      border-color:#b8caeb;
      box-shadow:0 8px 20px rgba(11,61,145,.09);
      transform:translateY(-1px);
    }
    .mega-card img{
      width:48px;
      height:48px;
      flex:0 0 48px;
      object-fit:cover;
      border-radius:9px;
      background:#eef3fa;
    }
    .mega-card img.tool-icon{object-fit:contain;padding:5px}
    .mega-card-copy{min-width:0;display:grid;gap:2px}
    .mega-card-copy strong{
      overflow:hidden;
      color:#1f304c;
      font-size:13px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card-copy span{
      overflow:hidden;
      color:#718096;
      font-size:11px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-category-list{
      margin-bottom:14px;
      display:flex;
      flex-wrap:wrap;
      gap:7px;
    }
    .mega-category-list a{
      padding:6px 10px;
      color:#39506f;
      background:#f1f5fa;
      border-radius:999px;
      font-size:12px;
    }
    .mega-category-list a:hover{color:#fff;background:var(--primary)}
    .header-btns{
      display:flex;
      align-items:center;
      flex:0 0 auto;
      gap:10px;
    }
    .header-btns>*>a,
    .header-btns>span>a{
      color:var(--primary);
      font-size:14px;
      font-weight:700;
    }
    .account-btn{
      padding:10px 16px;
      color:#fff;
      background:var(--primary);
      border-radius:10px;
      font-size:14px;
      font-weight:800;
      box-shadow:0 7px 16px rgba(11,61,145,.2);
    }
    .account-btn:hover{background:var(--primary-dark)}
    .hamburger{
      width:42px;
      height:42px;
      padding:9px;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:10px;
    }
    .hamburger span{
      width:20px;
      height:2px;
      display:block;
      background:#183153;
      transition:transform .2s ease,opacity .2s ease;
    }
    .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

    .drawer-overlay{
      position:fixed;
      inset:0;
      z-index:90;
      visibility:hidden;
      opacity:0;
      background:rgba(4,15,35,.62);
      transition:opacity .25s ease,visibility .25s;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:100;
      width:min(390px,90vw);
      overflow-y:auto;
      transform:translateX(105%);
      background:#fff;
      box-shadow:-20px 0 50px rgba(0,0,0,.18);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      padding:14px 18px;
      display:flex;
      align-items:center;
      gap:13px;
      color:#fff;
      background:var(--primary-dark);
    }
    .drawer-head a{font-weight:700}
    .drawer-head>*:first-child{margin-right:auto}
    .drawer-close{
      width:38px;
      height:38px;
      color:#fff;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.22);
      border-radius:9px;
      font-size:25px;
      line-height:1;
    }
    .drawer-menu{padding:15px}
    .drawer-link,
    .drawer-toggle{
      width:100%;
      padding:13px 12px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      color:#263752;
      background:transparent;
      border:0;
      border-bottom:1px solid #edf1f6;
      font-size:15px;
      font-weight:750;
      text-align:left;
    }
    .drawer-toggle::after{
      content:"+";
      color:var(--primary);
      font-size:20px;
      font-weight:400;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      padding:0 10px;
      background:#f7f9fc;
      border-radius:0 0 10px 10px;
      transition:max-height .3s ease,padding .3s ease;
    }
    .drawer-submenu.open{max-height:720px;padding:8px 10px}
    .drawer-submenu a{
      padding:9px 10px;
      display:block;
      color:#52617a;
      border-bottom:1px solid #e9eef5;
      font-size:13px;
    }
    .drawer-submenu a:last-child{border-bottom:0}

    .target-page-main{
      min-height:700px;
      overflow:hidden;
      background:
        radial-gradient(circle at 12% 8%,rgba(11,61,145,.08),transparent 30%),
        linear-gradient(180deg,#f7faff 0,#fff 34%);
    }
    .download-page-main .download-intro{
      padding:74px 0 56px;
      text-align:center;
    }
    .download-page-main .eyebrow{
      margin:0 0 14px;
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--primary);
      font-size:13px;
      font-weight:850;
      letter-spacing:.12em;
    }
    .download-page-main .eyebrow::before,
    .download-page-main .eyebrow::after{
      content:"";
      width:28px;
      height:1px;
      background:#8eaee3;
    }
    .download-page-main h1{
      max-width:850px;
      margin:0 auto 18px;
      color:#0b244b;
      font-size:clamp(36px,5vw,62px);
      line-height:1.12;
      letter-spacing:-.035em;
    }
    .download-page-main .intro-copy{
      max-width:720px;
      margin:0 auto;
      color:var(--muted);
      font-size:17px;
    }
    .download-page-main .safety-strip{
      width:min(900px,100%);
      margin:34px auto 0;
      padding:15px 22px;
      display:flex;
      align-items:center;
      justify-content:center;
      flex-wrap:wrap;
      gap:14px 26px;
      color:#38506f;
      background:rgba(255,255,255,.85);
      border:1px solid #dce6f5;
      border-radius:15px;
      box-shadow:0 12px 35px rgba(29,64,117,.08);
      backdrop-filter:blur(10px);
      font-size:13px;
      font-weight:700;
    }
    .download-page-main .safety-strip span{
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .download-page-main .safety-strip span::before{
      content:"✓";
      width:21px;
      height:21px;
      display:grid;
      place-items:center;
      color:#087347;
      background:#dff8ec;
      border-radius:50%;
      font-size:12px;
    }
    .download-page-main .download-panel{
      margin-bottom:76px;
      padding:34px;
      color:#fff;
      background:
        linear-gradient(135deg,rgba(5,24,57,.98),rgba(11,61,145,.96)),
        var(--primary);
      border:1px solid rgba(255,255,255,.1);
      border-radius:26px;
      box-shadow:0 25px 60px rgba(5,31,76,.22);
    }
    .download-page-main .panel-heading{
      max-width:760px;
      margin:0 auto 28px;
      text-align:center;
    }
    .download-page-main .panel-heading span{
      color:#91b5f3;
      font-size:13px;
      font-weight:800;
      letter-spacing:.1em;
    }
    .download-page-main .panel-heading h2{
      margin:7px 0 9px;
      color:#fff;
      font-size:clamp(27px,4vw,39px);
      line-height:1.2;
    }
    .download-page-main .panel-heading p{margin:0;color:#cad9f1}
    .download-page-main .platform-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:17px;
    }
    .download-page-main .platform-card{
      min-width:0;
      padding:25px;
      display:flex;
      flex-direction:column;
      align-items:flex-start;
      color:#eaf2ff;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.15);
      border-radius:18px;
      transition:transform .2s ease,background .2s ease,border-color .2s ease;
    }
    .download-page-main .platform-card:hover{
      transform:translateY(-4px);
      background:rgba(255,255,255,.12);
      border-color:rgba(112,169,255,.56);
    }
    .download-page-main .platform-icon{
      width:54px;
      height:54px;
      margin-bottom:17px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(145deg,#2369ce,#0b3d91);
      border:1px solid rgba(255,255,255,.25);
      border-radius:15px;
      font-size:23px;
      font-weight:900;
      box-shadow:0 12px 25px rgba(0,0,0,.18);
    }
    .download-page-main .platform-card h3{margin:0 0 8px;color:#fff;font-size:20px}
    .download-page-main .platform-card p{margin:0 0 18px;color:#c5d4e9;font-size:14px}
    .download-page-main .platform-meta{
      margin-top:auto;
      margin-bottom:16px;
      display:flex;
      flex-wrap:wrap;
      gap:7px;
    }
    .download-page-main .platform-meta span{
      padding:4px 8px;
      color:#dbe9ff;
      background:rgba(255,255,255,.08);
      border-radius:999px;
      font-size:11px;
    }
    .download-page-main .download-button{
      width:100%;
      padding:12px 16px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      color:#07275c;
      background:#fff;
      border-radius:11px;
      font-size:14px;
      font-weight:850;
    }
    .download-page-main .download-button:hover{background:#dfeaff}
    .download-page-main .download-button::after{content:"→";font-size:18px}
    .download-page-main .panel-note{
      margin:22px 0 0;
      color:#b9cce9;
      font-size:12px;
      text-align:center;
    }
    .download-page-main .section-block{padding:78px 0}
    .download-page-main .section-alt{background:#f5f8fc}
    .download-page-main .section-head{
      max-width:700px;
      margin:0 auto 38px;
      text-align:center;
    }
    .download-page-main .section-head small{
      color:var(--primary);
      font-weight:850;
      letter-spacing:.1em;
    }
    .download-page-main .section-head h2{
      margin:8px 0 12px;
      color:#102a53;
      font-size:clamp(28px,4vw,42px);
      line-height:1.2;
    }
    .download-page-main .section-head p{margin:0;color:var(--muted)}
    .download-page-main .step-grid{
      position:relative;
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:24px;
    }
    .download-page-main .step-grid::before{
      content:"";
      position:absolute;
      top:31px;
      left:16%;
      right:16%;
      height:2px;
      background:linear-gradient(90deg,#9cb9e7,#0b3d91,#9cb9e7);
    }
    .download-page-main .step-card{
      position:relative;
      z-index:1;
      padding:0 22px 25px;
      text-align:center;
    }
    .download-page-main .step-number{
      width:64px;
      height:64px;
      margin:0 auto 18px;
      display:grid;
      place-items:center;
      color:#fff;
      background:var(--primary);
      border:7px solid #e8effb;
      border-radius:50%;
      box-shadow:0 8px 22px rgba(11,61,145,.2);
      font-weight:900;
    }
    .download-page-main .step-card h3{margin:0 0 8px;color:#183458;font-size:19px}
    .download-page-main .step-card p{margin:0;color:var(--muted);font-size:14px}
    .download-page-main .security-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:17px;
    }
    .download-page-main .security-card{
      padding:24px 21px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
      box-shadow:0 9px 28px rgba(25,52,91,.06);
    }
    .download-page-main .security-mark{
      width:38px;
      height:38px;
      margin-bottom:14px;
      display:grid;
      place-items:center;
      color:var(--primary);
      background:var(--primary-soft);
      border-radius:11px;
      font-weight:900;
    }
    .download-page-main .security-card h3{margin:0 0 7px;color:#183458;font-size:17px}
    .download-page-main .security-card p{margin:0;color:var(--muted);font-size:13px}
    .download-page-main .faq-wrap{
      max-width:860px;
      margin:0 auto;
      display:grid;
      gap:12px;
    }
    .download-page-main details{
      background:#fff;
      border:1px solid var(--line);
      border-radius:14px;
      box-shadow:0 7px 22px rgba(21,47,83,.05);
    }
    .download-page-main summary{
      padding:18px 55px 18px 20px;
      position:relative;
      color:#19365c;
      font-weight:800;
      cursor:pointer;
      list-style:none;
    }
    .download-page-main summary::-webkit-details-marker{display:none}
    .download-page-main summary::after{
      content:"+";
      position:absolute;
      top:50%;
      right:20px;
      transform:translateY(-50%);
      color:var(--primary);
      font-size:24px;
      font-weight:400;
    }
    .download-page-main details[open] summary::after{content:"−"}
    .download-page-main details p{
      margin:0;
      padding:0 20px 19px;
      color:var(--muted);
      font-size:14px;
    }
    .download-page-main .final-cta{
      margin:78px auto;
      padding:46px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:34px;
      color:#fff;
      background:linear-gradient(120deg,#071d41,#0b3d91);
      border-radius:24px;
      box-shadow:0 20px 45px rgba(6,37,89,.19);
    }
    .download-page-main .final-cta h2{margin:0 0 8px;color:#fff;font-size:30px}
    .download-page-main .final-cta p{max-width:650px;margin:0;color:#c9d9f1}
    .download-page-main .cta-button{
      flex:0 0 auto;
      padding:13px 22px;
      color:var(--primary-dark);
      background:#fff;
      border-radius:11px;
      font-weight:850;
    }
    .download-page-main .cta-button:hover{background:#e9f1ff}

    .footer{
      padding:58px 0 0;
      color:#bdcbe0;
      background:#06172f;
    }
    .footer-grid{
      padding-bottom:44px;
      display:grid;
      grid-template-columns:1.45fr 1fr 1fr 1.1fr;
      gap:42px;
    }
    .footer .logo{color:#fff}
    .footer-brand p{max-width:390px;margin:18px 0 0;color:#9fb0c8;font-size:14px}
    .footer h3{margin:4px 0 16px;color:#fff;font-size:15px}
    .footer-links,
    .footer-contact{display:grid;gap:9px}
    .footer-links a,
    .footer-contact a,
    .footer-contact span{
      color:#aebed3;
      font-size:13px;
      transition:color .2s ease;
    }
    .footer-links a:hover,
    .footer-contact a:hover{color:#fff}
    .footer-bottom{
      min-height:66px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      color:#8498b5;
      border-top:1px solid rgba(255,255,255,.1);
      font-size:12px;
    }

    @media (max-width:1120px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-inner{min-height:72px}
      .header-btns{margin-left:auto}
    }

    @media (max-width:860px){
      .container{width:min(100% - 30px,1180px)}
      .topbar-inner{min-height:44px}
      .topbar-contact{gap:12px}
      .download-page-main .platform-grid,
      .download-page-main .step-grid{grid-template-columns:1fr}
      .download-page-main .step-grid::before{display:none}
      .download-page-main .security-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .download-page-main .final-cta{display:block;text-align:center}
      .download-page-main .cta-button{margin-top:22px;display:inline-flex}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }

    @media (max-width:580px){
      .container{width:min(100% - 24px,1180px)}
      .topbar-inner{padding:8px 0;display:block;text-align:center}
      .topbar-contact{margin-top:2px;justify-content:center;flex-wrap:wrap}
      .header-btns>*>a,
      .header-btns>span>a{display:none}
      .account-btn{display:none}
      .logo span{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
      .download-page-main .download-intro{padding:52px 0 40px}
      .download-page-main .intro-copy{font-size:15px}
      .download-page-main .safety-strip{align-items:flex-start;flex-direction:column}
      .download-page-main .download-panel{padding:22px;margin-bottom:54px;border-radius:20px}
      .download-page-main .section-block{padding:58px 0}
      .download-page-main .security-grid{grid-template-columns:1fr}
      .download-page-main .final-cta{margin:58px auto;padding:32px 22px}
      .download-page-main .final-cta h2{font-size:25px}
      .footer-grid{grid-template-columns:1fr;gap:30px}
      .footer-bottom{padding:18px 0;align-items:flex-start;flex-direction:column;justify-content:center}
    }