:root{
      --theme:#0B3D91;
      --ink:#182033;
      --muted:#62708a;
      --line:#dce3ef;
      --paper:#f5f7fb;
      --white:#ffffff;
      --accent:#b58a47;
      --dark:#111827;
      --shadow:0 18px 48px rgba(22,37,66,.1);
      --radius:8px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Noto Sans TC","Microsoft JhengHei",sans-serif;line-height:1.7}
    body.drawer-locked{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{background:#0f1728;color:#cfd7e6;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{display:flex;align-items:center;gap:22px}
    .topbar a:hover{color:#fff}

    .header{position:relative;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:inline-flex;align-items:center;gap:10px;color:var(--dark);font-size:19px;font-weight:800;white-space:nowrap}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:3px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:7px;padding:27px 13px;color:#364158;font-size:14px;font-weight:700;white-space:nowrap}
    .nav-link:hover,.nav-link:focus-visible{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;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:50%;visibility:hidden;opacity:0;transform:translate(-50%,8px);transition:opacity .2s ease,transform .2s ease,visibility .2s;z-index:30;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 var(--radius) var(--radius)}
    .dropdown-panel{width:275px;padding:12px}
    .dropdown-panel a{display:block;padding:10px 12px;border-bottom:1px solid #edf0f5;font-size:13px}
    .dropdown-panel a:hover{background:#f2f5fa;color:var(--theme)}
    .dropdown-panel .dropdown-all{border:0;color:var(--theme);font-weight:800}
    .mega-menu{width:min(720px,calc(100vw - 32px));padding:22px}
    .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:translate(-50%,0)}
    .mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .mega-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;padding-bottom:15px;border-bottom:1px solid var(--line)}
    .mega-head strong{font-size:16px}
    .mega-head span{color:var(--muted);font-size:12px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;padding:16px 0}
    .mega-card{display:flex;align-items:center;gap:11px;min-width:0;padding:10px;border:1px solid #e6ebf3;border-radius:6px}
    .mega-card:hover{border-color:#9db5dc;background:#f7f9fd}
    .mega-card>img{width:42px;height:42px;object-fit:cover;border-radius:5px;background:#e9eef7}
    .mega-card-body{display:grid;gap:2px;min-width:0}
    .mega-card-body strong,.mega-card-body small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card-body strong{font-size:13px}
    .mega-card-body small{color:var(--muted);font-size:11px}
    .mega-categories{display:flex;flex-wrap:wrap;gap:8px;padding:15px 0 2px}
    .mega-categories a{padding:4px 10px;background:#f0f3f8;border-radius:4px;color:#40506c;font-size:12px}
    .mega-categories a:hover{background:#dfe8f7;color:var(--theme)}
    .mega-footer{display:block;padding-top:13px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:800}
    .header-btns{display:flex;align-items:center;gap:12px}
    .account-btn,.primary-btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--theme);border-radius:5px;background:var(--theme);color:#fff;padding:9px 16px;font-size:13px;font-weight:800}
    .account-btn:hover,.primary-btn:hover{background:#092f72}
    .hamburger{display:none;width:42px;height:42px;padding:9px;border:1px solid var(--line);border-radius:5px;background:#fff;cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--ink);transition:.2s}
    .hamburger.active span:first-child{transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-6px) rotate(-45deg)}

    .drawer-overlay{position:fixed;inset:0;z-index:40;background:rgba(8,16,31,.5);opacity:0;visibility:hidden;transition:.2s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;z-index:41;width:min(390px,88vw);overflow-y:auto;background:#fff;transform:translateX(100%);transition:transform .25s ease;box-shadow:-16px 0 40px rgba(0,0,0,.16)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:15px;padding:20px;border-bottom:1px solid var(--line)}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-weight:800;font-size:14px}
    .drawer-close{width:34px;height:34px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--muted);font-size:24px;line-height:1;cursor:pointer}
    .drawer-menu{padding:9px 20px 28px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf0f5;background:none;color:var(--ink);text-align:left;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px;font-weight:400}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:13px}

    .download-page-main{min-height:720px}
    .download-hero{position:relative;overflow:hidden;padding:86px 0 78px;background:#101a2c;color:#fff}
    .download-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(11,61,145,.9),rgba(15,27,48,.88) 62%,rgba(181,138,71,.46));pointer-events:none}
    .download-hero:after{content:"";position:absolute;right:-100px;top:-180px;width:520px;height:520px;border:1px solid rgba(255,255,255,.16);border-radius:50%;box-shadow:0 0 0 54px rgba(255,255,255,.035),0 0 0 108px rgba(255,255,255,.025)}
    .download-hero .container{position:relative;z-index:1}
    .breadcrumb{display:flex;gap:9px;align-items:center;margin-bottom:27px;color:#b7c7e2;font-size:13px}
    .breadcrumb a:hover{color:#fff}
    .download-kicker{margin:0 0 13px;color:#d8b878;font-size:13px;font-weight:800;letter-spacing:1.5px}
    .download-hero h1{max-width:700px;margin:0;font-size:clamp(34px,5vw,60px);line-height:1.15;letter-spacing:0}
    .download-hero p{max-width:640px;margin:20px 0 0;color:#d8e0ed;font-size:17px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
    .hero-actions .primary-btn{background:#fff;border-color:#fff;color:var(--theme)}
    .hero-actions .primary-btn:hover{background:#e8eef8}
    .secondary-btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.45);border-radius:5px;padding:9px 16px;color:#fff;font-size:13px;font-weight:800}
    .secondary-btn:hover{background:rgba(255,255,255,.1)}
    .platform-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:28px}
    .platform-tags span{padding:5px 11px;border:1px solid rgba(255,255,255,.25);border-radius:20px;color:#d7e1f3;font-size:12px}
    .download-content{padding:74px 0 88px}
    .section-heading{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
    .section-heading h2{margin:0;font-size:28px;line-height:1.3}
    .section-heading p{max-width:500px;margin:0;color:var(--muted);font-size:14px}
    .download-options{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .download-card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(30,48,82,.05)}
    .download-card.featured{border-top:3px solid var(--accent)}
    .device-icon{display:flex;align-items:center;justify-content:center;width:48px;height:48px;margin-bottom:17px;border-radius:50%;background:#eaf0fb;color:var(--theme);font-size:21px;font-weight:900}
    .download-card h3{margin:0 0 6px;font-size:19px}
    .download-card p{min-height:52px;margin:0 0 20px;color:var(--muted);font-size:13px}
    .card-meta{display:flex;justify-content:space-between;margin-bottom:17px;padding-top:14px;border-top:1px solid #edf0f5;color:#7b879b;font-size:12px}
    .text-link{color:var(--theme);font-size:13px;font-weight:800}
    .text-link:after{content:"  →"}
    .steps-section{padding:70px 0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
    .step{position:relative;padding-top:17px;border-top:2px solid #d9e2f1}
    .step-number{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;margin-bottom:12px;border-radius:50%;background:var(--theme);color:#fff;font-size:13px;font-weight:800}
    .step h3{margin:0 0 6px;font-size:17px}
    .step p{margin:0;color:var(--muted);font-size:13px}
    .faq-section{padding:70px 0}
    .faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .faq-item{padding:19px 21px;background:#fff;border:1px solid var(--line);border-radius:6px}
    .faq-item h3{margin:0 0 7px;font-size:15px}
    .faq-item p{margin:0;color:var(--muted);font-size:13px}
    .footer{padding:55px 0 20px;background:#101827;color:#c4cede}
    .footer-main{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:45px}
    .footer-brand .logo{color:#fff;margin-bottom:15px}
    .footer-brand p{max-width:330px;margin:0;color:#95a4ba;font-size:13px}
    .footer h3{margin:3px 0 14px;color:#fff;font-size:14px}
    .footer-links{display:grid;gap:8px}
    .footer-links a,.footer-contact a{color:#aebbd0;font-size:13px}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-contact{display:grid;gap:8px}
    .footer-social{color:#d8b878;font-size:13px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);color:#8290a5;font-size:12px}

    @media (max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .download-options{grid-template-columns:repeat(2,1fr)}
      .footer-main{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-contact{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:68px;gap:10px}
      .logo{font-size:16px}
      .logo img{width:30px;height:30px}
      .header-btns .account-btn{display:none}
      .download-hero{padding:50px 0 54px}
      .download-hero h1{font-size:38px}
      .download-hero p{font-size:15px}
      .section-heading{display:block}
      .section-heading p{margin-top:10px}
      .download-content,.faq-section{padding:52px 0 60px}
      .download-options,.steps,.faq-list{grid-template-columns:1fr}
      .download-card p{min-height:0}
      .steps{gap:25px}
      .footer-main{grid-template-columns:1fr;gap:28px}
      .footer-bottom{display:grid;gap:7px;margin-top:30px}
    }