:root{
      --theme:#0B3D91;
      --theme-dark:#082b68;
      --ink:#172033;
      --muted:#657087;
      --line:#dfe5ee;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 18px 45px rgba(16,36,72,.12);
      --radius:8px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;font-family:Arial,"Noto Sans TC","Microsoft JhengHei",sans-serif;line-height:1.7}
    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:#101827;color:#cbd5e5;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{display:flex;gap:22px}
    .topbar a:hover{color:#fff}

    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:max-content;font-size:20px;font-weight:800;color:var(--theme)}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:7px;padding:26px 12px;color:#273247;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus-visible{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;width:340px;padding:20px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translate(-50%,8px);transition:.2s ease;z-index:30}
    .mega-menu{width:620px}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible;transform:translate(-50%,0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-list{display:grid;gap:4px}
    .dropdown-list a,.mega-links a{display:block;padding:8px 10px;border-radius:5px;color:#4b5870;font-size:14px}
    .dropdown-list a:hover,.mega-links a:hover{background:var(--soft);color:var(--theme)}
    .mega-heading{margin:0 0 12px;font-size:14px;color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
    .mega-card{display:flex;align-items:center;gap:9px;min-width:0;padding:9px;border:1px solid #e8edf4;border-radius:6px}
    .mega-card:hover{border-color:#9db7de;background:#f8fbff}
    .mega-card img{width:34px;height:34px;object-fit:cover;border-radius:5px;background:#edf2f8;flex:0 0 auto}
    .mega-card span{min-width:0;display:grid;gap:2px}
    .mega-card strong,.mega-card span span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:13px}
    .mega-card span span{font-size:11px;color:var(--muted)}
    .mega-footer{display:block;margin-top:16px;padding-top:13px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-btn{color:var(--theme);font-size:13px}
    .open-btn{padding:9px 16px;border-radius:5px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .open-btn:hover{background:var(--theme-dark)}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);border-radius:5px;background:#fff;cursor:pointer}
    .hamburger span{display:block;width:20px;height:2px;margin:4px auto;background:var(--ink);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

    .drawer-overlay{position:fixed;inset:0;background:rgba(7,17,35,.52);opacity:0;visibility:hidden;transition:.2s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(380px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.25s ease;z-index:41;overflow-y:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head span{flex:1;color:var(--theme)}
    .drawer-head a{padding:6px 11px;background:var(--theme);color:#fff;border-radius:4px;font-size:13px}
    .drawer-close{width:32px;height:32px;border:0;background:transparent;color:#536078;font-size:25px;cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf0f5;background:transparent;text-align:left;color:var(--ink);font-weight:600;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:5px 0 8px 14px;border-bottom:1px solid #edf0f5}
    .drawer-submenu.open{display:grid}
    .drawer-submenu a{padding:7px 0;color:var(--muted);font-size:14px}

    .download-page-main{padding:70px 0 90px}
    .download-intro{text-align:center;max-width:760px;margin:0 auto 44px}
    .eyebrow{display:inline-flex;padding:5px 11px;border-radius:20px;background:#e8f0fc;color:var(--theme);font-size:12px;font-weight:700;letter-spacing:.04em}
    .download-intro h1{margin:15px 0 12px;font-size:clamp(30px,5vw,52px);line-height:1.18;letter-spacing:0}
    .download-intro p{margin:0;color:var(--muted);font-size:16px}
    .download-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:start}
    .download-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .panel-heading{padding:24px 26px 18px;border-bottom:1px solid var(--line)}
    .panel-heading h2{margin:0 0 5px;font-size:22px}
    .panel-heading p{margin:0;color:var(--muted);font-size:14px}
    .steps{display:grid;gap:0;padding:8px 26px 24px}
    .step{display:grid;grid-template-columns:42px 1fr;gap:15px;padding:19px 0;border-bottom:1px solid #edf0f5}
    .step:last-child{border-bottom:0}
    .step-number{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--theme);color:#fff;font-size:14px;font-weight:700}
    .step h3{margin:0 0 4px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px}
    .download-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:15px}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 17px;border-radius:5px;font-size:14px;font-weight:700}
    .primary-btn{background:var(--theme);color:#fff}
    .primary-btn:hover{background:var(--theme-dark)}
    .secondary-btn{border:1px solid #bdc9da;color:var(--theme);background:#fff}
    .secondary-btn:hover{background:#f4f7fc}
    .download-aside{display:grid;gap:20px}
    .trust-panel{padding:25px}
    .trust-panel h2{margin:0 0 15px;font-size:20px}
    .trust-list{display:grid;gap:13px;margin:0;padding:0;list-style:none}
    .trust-list li{display:flex;gap:10px;color:#4f5c72;font-size:14px}
    .trust-list li:before{content:"✓";display:grid;place-items:center;width:21px;height:21px;border-radius:50%;background:#e7f0fd;color:var(--theme);font-weight:700;flex:0 0 auto}
    .notice{padding:19px 21px;border-left:4px solid var(--theme);background:#edf4ff;color:#43516a;font-size:13px}
    .faq-section{margin-top:28px;padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
    .faq-section h2{margin:0 0 18px;font-size:22px}
    .faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .faq-item{padding:17px 18px;border:1px solid #e7ebf2;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{background:#101827;color:#aeb9cb;padding:54px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:35px}
    .footer-brand strong{display:block;margin-bottom:12px;color:#fff;font-size:20px}
    .footer p{margin:8px 0;font-size:13px;line-height:1.8}
    .footer h3{margin:0 0 13px;color:#fff;font-size:14px}
    .footer-grid>div:not(.footer-brand){display:grid;align-content:start;gap:7px}
    .footer-grid a,.footer-grid span{font-size:13px}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:35px;padding-top:17px;border-top:1px solid #2b3547;color:#8592a8;font-size:12px}

    @media(max-width:1020px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .download-grid{grid-template-columns:1fr}
      .download-aside{grid-template-columns:1fr 1fr}
    }
    @media(max-width:680px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-contact{flex-wrap:wrap;gap:8px 16px}
      .header-inner{height:68px;gap:12px}
      .member-btn{display:none}
      .logo{font-size:17px}
      .download-page-main{padding:45px 0 65px}
      .download-intro{margin-bottom:28px}
      .download-intro h1{font-size:34px}
      .download-grid{gap:16px}
      .download-aside{grid-template-columns:1fr}
      .panel-heading,.steps{padding-left:19px;padding-right:19px}
      .faq-section{padding:20px 17px}
      .faq-list{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
      .footer-bottom{display:grid;gap:7px}
    }