:root{
      --blue:#0B3D91;
      --ink:#17243b;
      --muted:#68758a;
      --line:#e4e9f1;
      --soft:#f5f7fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(18,42,78,.1);
      --radius:18px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","PingFang SC",Arial,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:auto}

    .topbar{height:38px;background:#f3f6fa;color:#66758c;font-size:12px}
    .topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between}
    .topbar-right{display:flex;gap:20px}
    .topbar a:hover{color:var(--blue)}

    .header{height:78px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
    .header-inner{height:100%;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:19px;font-weight:800;color:var(--blue)}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:4px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 14px;font-size:14px;color:#35445b;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--blue)}
    .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%;transform:translateX(-50%) translateY(8px);width:280px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:650px}
    .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:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .menu-title{margin:0 0 12px;color:var(--blue);font-size:13px;font-weight:700}
    .menu-list{display:grid;gap:8px}
    .menu-list a{font-size:13px;color:#536177}
    .menu-list a:hover{color:var(--blue)}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
    .broker-mini,.video-mini,.tool-mini,.product-mini{display:flex;align-items:center;gap:9px;padding:8px 0;border-bottom:1px solid #eef1f5;font-size:12px;color:#5b687b}
    .broker-mini img{width:30px;height:30px;object-fit:contain}
    .video-mini img,.product-mini img{width:54px;height:36px;border-radius:5px;object-fit:cover}
    .tool-mini img{width:28px;height:28px;object-fit:contain}
    .broker-mini b,.tool-mini b{color:#263851}
    .mega-footer{display:block;margin-top:14px;color:var(--blue);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:9px}
    .member-btn,.open-btn{padding:8px 13px;border-radius:8px;font-size:13px}
    .member-btn{color:var(--blue);border:1px solid #cdd9ec}
    .open-btn{background:var(--blue);color:#fff}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:var(--blue);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(8,20,40,.45);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:-360px;width:min(360px,88vw);height:100vh;background:#fff;z-index:50;transition:right .25s;overflow:auto}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);color:var(--blue);font-weight:700}
    .drawer-head a{margin-left:auto;background:var(--blue);color:#fff;padding:5px 12px;border-radius:6px;font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;color:#7b8797;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 #edf0f4;background:none;text-align:left;color:#273852;font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--blue);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 12px;background:#f7f9fc;border-radius:8px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:#647187;font-size:13px}

    .download-page-main{background:linear-gradient(180deg,#f7f9fc 0,#fff 54%);padding-bottom:90px}
    .download-hero{padding:78px 0 58px;text-align:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);background:#eaf0fa;border-radius:30px;padding:6px 14px;font-size:13px;font-weight:700}
    .eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--blue)}
    .download-hero h1{margin:18px 0 12px;font-size:clamp(32px,5vw,58px);line-height:1.15;letter-spacing:-1px;color:#162844}
    .download-hero p{max-width:660px;margin:0 auto;color:var(--muted);font-size:16px}
    .download-actions{display:flex;justify-content:center;gap:12px;margin-top:28px;flex-wrap:wrap}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:9px;font-size:14px;font-weight:700}
    .primary-btn{background:var(--blue);color:#fff;box-shadow:0 9px 22px rgba(11,61,145,.2)}
    .secondary-btn{border:1px solid #cbd6e6;color:var(--blue);background:#fff}
    .download-panel{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:28px;margin-top:15px}
    .platform-head{display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid var(--line);padding-bottom:20px}
    .platform-title{display:flex;align-items:center;gap:14px}
    .platform-icon{width:48px;height:48px;border-radius:13px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}
    .platform-title h2{margin:0;font-size:20px}
    .platform-title p{margin:2px 0 0;color:var(--muted);font-size:13px}
    .version{font-size:12px;color:#6c7890;background:#f2f5fa;padding:6px 11px;border-radius:20px}
    .download-options{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px}
    .download-option{padding:20px;border:1px solid #e2e8f1;border-radius:14px;background:#fbfcfe}
    .download-option h3{margin:0 0 7px;font-size:16px}
    .download-option p{min-height:48px;margin:0 0 15px;color:var(--muted);font-size:13px}
    .download-option a{color:var(--blue);font-weight:700;font-size:13px}
    .download-option a:after{content:" →";font-size:16px}
    .steps{padding:76px 0 20px}
    .section-heading{text-align:center;margin-bottom:32px}
    .section-heading h2{margin:0 0 8px;font-size:30px}
    .section-heading p{margin:0;color:var(--muted)}
    .step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .step-card{position:relative;padding:25px;background:#fff;border:1px solid var(--line);border-radius:16px}
    .step-no{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:#eaf0fa;color:var(--blue);font-weight:800}
    .step-card h3{margin:17px 0 7px;font-size:17px}
    .step-card p{margin:0;color:var(--muted);font-size:14px}
    .download-faq{padding-top:62px}
    .faq-list{max-width:850px;margin:auto;display:grid;gap:10px}
    .faq-item{padding:18px 22px;border:1px solid var(--line);border-radius:12px;background:#fff}
    .faq-item strong{display:block;margin-bottom:5px}
    .faq-item p{margin:0;color:var(--muted);font-size:14px}
    .footer{background:#111d31;color:#b9c4d4;padding:55px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:38px}
    .footer-brand{color:#fff;font-size:20px;font-weight:800;margin-bottom:12px}
    .footer p{font-size:13px;margin:7px 0;color:#aab7ca}
    .footer h3{color:#fff;font-size:14px;margin:0 0 13px}
    .footer-grid a{display:block;color:#aab7ca;font-size:13px;margin:7px 0}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #2d3b50;margin-top:35px;padding-top:18px;font-size:12px;color:#8290a4}

    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:680px){
      .container{width:min(100% - 28px,1180px)}
      .topbar{height:auto;padding:8px 0}
      .topbar .container,.topbar-right{gap:8px;flex-wrap:wrap}
      .topbar-right{justify-content:flex-end}
      .header{height:68px}
      .logo{font-size:16px}
      .member-btn,.open-btn{display:none}
      .download-hero{padding:55px 0 36px}
      .download-hero h1{font-size:36px}
      .download-hero p{font-size:14px}
      .download-panel{padding:18px}
      .platform-head{align-items:flex-start;flex-direction:column}
      .download-options,.step-grid{grid-template-columns:1fr}
      .download-option p{min-height:0}
      .steps{padding-top:55px}
      .section-heading h2{font-size:25px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:7px}
    }