:root{
      --theme:#0B3D91;
      --theme-dark:#082b68;
      --ink:#142033;
      --muted:#667085;
      --line:#e5eaf2;
      --soft:#f4f7fb;
      --white:#fff;
      --accent:#d9a441;
      --danger:#b52a32;
      --shadow:0 18px 45px rgba(16,38,76,.10);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:#fff;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#091c3d;color:#cbd7eb;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between}
    .topbar a{color:#fff}
    .topbar-links{display:flex;gap:24px}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:78px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:var(--theme);white-space:nowrap}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{list-style:none;padding:0;margin:0;display:flex;align-items:center;justify-content:center;gap:4px}
    .nav-item{position:relative}
    .nav-link{display:block;padding:26px 15px;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8490a3}
    .dropdown-panel,.mega-menu{display:none;position:absolute;top:100%;left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 14px 14px;padding:18px;z-index:30}
    .dropdown-panel{width:250px}
    .dropdown-panel a{display:block;padding:8px 10px;border-bottom:1px solid #f0f2f6;font-size:14px}
    .dropdown-panel a:last-child{color:var(--theme);font-weight:700;border:0}
    .mega-menu{width:760px}
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu,.nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel{display:block}
    .nav-item>.mega-menu:before,.nav-item>.dropdown-panel:before{content:"";position:absolute;top:-16px;left:0;right:0;height:16px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;min-height:76px;padding:11px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe}
    .mega-card:hover{border-color:var(--theme);background:#f4f8ff}
    .mega-card img{width:38px;height:38px;object-fit:contain;flex:0 0 auto}
    .mega-card strong{display:block;font-size:13px;color:#17243a}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.5}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;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-link{font-size:14px;color:var(--theme);font-weight:700}
    .open-account{padding:9px 16px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px}
    .hamburger{display:none;width:42px;height:38px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:8px;cursor:pointer}
    .hamburger span{display:block;height:2px;background:var(--theme);margin:5px 0;transition:.2s}
    .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{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;right:-360px;top:0;bottom:0;width:min(350px,88vw);background:#fff;z-index:50;transition:right .25s ease;overflow:auto;box-shadow:-12px 0 35px rgba(0,0,0,.15)}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:700;color:var(--theme)}
    .drawer-head>a{margin-left:auto;background:var(--theme);color:#fff;padding:5px 12px;border-radius:6px;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:28px;color:#697386;cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;font:inherit;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#8a94a6}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 8px 15px;border-bottom:1px solid var(--line)}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:80px;background:#0b1830;color:#b8c5d9;padding:52px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:35px}
    .footer strong{color:#fff;font-size:20px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer p{margin:6px 0;font-size:13px}
    .footer-grid>div>a{display:block;margin:6px 0;font-size:13px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);font-size:12px}
    .download-page-main{background:linear-gradient(180deg,#f5f8fd 0,#fff 480px);padding-bottom:10px}
    .download-hero{padding:76px 0 55px;text-align:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:700;letter-spacing:.08em}
    .eyebrow:before{content:"";width:28px;height:2px;background:var(--accent)}
    .download-hero h1{margin:14px 0 12px;font-size:clamp(34px,5vw,58px);line-height:1.18;letter-spacing:-.04em}
    .download-hero p{max-width:680px;margin:0 auto;color:var(--muted);font-size:16px}
    .download-actions{display:flex;justify-content:center;gap:12px;margin-top:27px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:8px;border:1px solid var(--theme);font-size:14px;font-weight:700}
    .btn-primary{background:var(--theme);color:#fff}
    .btn-secondary{background:#fff;color:var(--theme)}
    .download-panel{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:34px}
    .download-panel h2{margin:0;text-align:center;font-size:26px}
    .download-panel-intro{text-align:center;color:var(--muted);margin:7px 0 30px}
    .download-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .step{position:relative;padding:24px 18px;border:1px solid var(--line);border-radius:14px;background:#fbfcff}
    .step:not(:last-child):after{content:"→";position:absolute;right:-18px;top:42px;color:var(--accent);font-size:22px;font-weight:700;z-index:1}
    .step-no{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;background:var(--theme);color:#fff;font-weight:800;margin-bottom:14px}
    .step h3{margin:0 0 7px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:13px}
    .download-note{margin-top:28px;padding:15px 18px;border-left:3px solid var(--accent);background:#fffaf0;color:#6f5521;font-size:13px}
    .software-section{padding:68px 0 0}
    .section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:22px}
    .section-heading h2{margin:0;font-size:28px}
    .section-heading p{margin:0;color:var(--muted);font-size:14px}
    .software-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .software-card{padding:25px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:0 8px 25px rgba(25,46,84,.05)}
    .software-card .card-icon{width:48px;height:48px;border-radius:12px;background:#eaf1ff;color:var(--theme);display:grid;place-items:center;font-size:22px;font-weight:800}
    .software-card h3{margin:18px 0 6px;font-size:18px}
    .software-card p{color:var(--muted);font-size:14px;margin:0 0 17px}
    .text-link{color:var(--theme);font-size:13px;font-weight:700}
    .faq-section{padding:70px 0 0}
    .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .faq-item{padding:20px 22px;border:1px solid var(--line);border-radius:12px;background:#fff}
    .faq-item h3{margin:0 0 8px;font-size:15px}
    .faq-item p{margin:0;color:var(--muted);font-size:13px}
    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{justify-content:space-between}
      .download-steps{grid-template-columns:repeat(2,1fr)}
      .step:nth-child(2):after{display:none}
      .software-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:600px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{display:block;padding:7px 0}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{height:68px;gap:10px}
      .member-link{display:none}
      .open-account{padding:8px 12px}
      .download-hero{padding:52px 0 38px}
      .download-hero h1{font-size:36px}
      .download-hero p{font-size:14px}
      .download-actions{flex-direction:column}
      .download-panel{padding:20px 15px}
      .download-steps,.software-grid,.faq-grid{grid-template-columns:1fr}
      .step:not(:last-child):after{display:none}
      .section-heading{display:block}
      .section-heading p{margin-top:6px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:6px}
    }