:root{
      --theme:#0B3D91;
      --theme-dark:#082d6b;
      --ink:#172033;
      --muted:#687386;
      --line:#e5e9f0;
      --soft:#f5f7fb;
      --white:#fff;
      --shadow:0 18px 55px rgba(23,32,51,.10);
      --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:0 auto}

    .topbar{height:38px;background:#f4f6fa;color:#6b7585;font-size:13px}
    .topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between}
    .topbar-info{display:flex;gap:22px}
    .topbar a:hover{color:var(--theme)}

    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-weight:800;font-size:19px;color:var(--theme)}
    .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;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 14px;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{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%;transform:translateX(-50%) translateY(8px);width:300px;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 ease}
    .mega-menu{width:620px}
    .nav-item:after{content:"";position:absolute;left:0;right:0;top:100%;height:12px}
    .nav-item:hover>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.dropdown-panel,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
    .mega-heading{margin:0 0 12px;color:var(--theme);font-size:14px;font-weight:800}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
    .mega-list,.broker-mini,.video-mini,.product-mini{display:grid;gap:9px}
    .mega-list a,.broker-mini a,.video-mini a,.product-mini a{display:block;padding:8px 10px;border-radius:8px;font-size:13px;color:#566174}
    .mega-list a:hover,.broker-mini a:hover,.video-mini a:hover,.product-mini a:hover{background:#f1f5fb;color:var(--theme)}
    .broker-mini strong,.product-mini strong{color:var(--ink)}
    .mega-menu p:not(.mega-heading){font-size:13px;color:var(--muted);margin:0 0 16px}
    .mega-footer{display:inline-block;margin-top:16px;color:var(--theme);font-size:13px;font-weight:700}
    .mega-list img{display:inline-block;width:22px;height:22px;vertical-align:middle;object-fit:contain}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-btn,.open-btn{border-radius:9px;padding:8px 14px;font-size:13px;font-weight:700}
    .member-btn{color:var(--theme);border:1px solid #ccd8ed}
    .open-btn{color:#fff;background:var(--theme)}
    .member-btn:hover{background:#f0f4fb}
    .open-btn:hover{background:var(--theme-dark)}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:5px 0;background:var(--theme);transition:.2s}
    .hamburger.active span:first-child{transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-7px) rotate(-45deg)}

    .drawer-overlay{display:none;position:fixed;z-index:40;inset:0;background:rgba(7,18,38,.45)}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:41;top:0;right:-390px;width:min(390px,88vw);height:100vh;overflow:auto;background:#fff;box-shadow:-15px 0 45px rgba(0,0,0,.16);transition:right .28s ease}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:13px;padding:20px;border-bottom:1px solid var(--line);font-weight:800;color:var(--theme)}
    .drawer-head a{margin-left:auto;background:var(--theme);color:#fff;padding:6px 12px;border-radius:7px;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:27px;line-height:1;color:#667085;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 #edf0f5;background:none;text-align:left;color:var(--ink);font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 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{background:#f7f9fc;padding-bottom:90px}
    .download-hero{padding:78px 0 70px;text-align:center;background:linear-gradient(135deg,#edf4ff 0%,#fff 62%);border-bottom:1px solid #e3eaf5}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:26px;height:2px;background:var(--theme)}
    .download-hero h1{max-width:780px;margin:15px auto 14px;font-size:clamp(32px,5vw,54px);line-height:1.2;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:28px;flex-wrap:wrap}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:9px;font-size:14px;font-weight:800}
    .primary-btn{background:var(--theme);color:#fff;box-shadow:0 9px 22px rgba(11,61,145,.2)}
    .secondary-btn{background:#fff;border:1px solid #ccd8ed;color:var(--theme)}
    .primary-btn:hover{background:var(--theme-dark)}
    .secondary-btn:hover{background:#f0f4fb}
    .download-wrap{padding-top:58px}
    .section-title{text-align:center;margin-bottom:28px}
    .section-title h2{margin:0 0 8px;font-size:28px}
    .section-title p{margin:0;color:var(--muted)}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .step-card{position:relative;padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(28,46,80,.05)}
    .step-number{display:flex;align-items:center;justify-content:center;width:42px;height:42px;margin-bottom:18px;border-radius:50%;background:#e7effc;color:var(--theme);font-weight:900}
    .step-card h3{margin:0 0 8px;font-size:18px}
    .step-card p{margin:0;color:var(--muted);font-size:14px}
    .download-panel{display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:stretch;margin-top:58px}
    .platform-card,.notice-card{padding:30px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(28,46,80,.05)}
    .platform-card h2,.notice-card h2{margin:0 0 10px;font-size:23px}
    .platform-card p,.notice-card p{color:var(--muted);font-size:14px}
    .platform-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:22px 0}
    .platform-item{padding:16px;background:#f6f8fc;border-radius:12px}
    .platform-item strong{display:block;margin-bottom:3px}
    .platform-item span{font-size:12px;color:var(--muted)}
    .faq{margin-top:60px}
    .faq-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .faq-item{padding:21px 24px;background:#fff;border:1px solid var(--line);border-radius:13px}
    .faq-item h3{margin:0 0 6px;font-size:16px}
    .faq-item p{margin:0;color:var(--muted);font-size:14px}

    .footer{background:#111a2b;color:#d6deed;padding:52px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:35px}
    .footer-brand{color:#fff;font-size:20px;font-weight:800;margin-bottom:12px}
    .footer p{margin:0;color:#9da9be;font-size:13px}
    .footer h3{margin:0 0 13px;color:#fff;font-size:15px}
    .footer-grid>div>a{display:block;margin:5px 0;color:#aeb9ca;font-size:13px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);color:#8f9bb0;font-size:12px}

    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .member-btn{display:none}
      .header-inner{min-height:68px}
      .logo{margin-right:auto}
      .download-panel{grid-template-columns:1fr}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar{height:auto;padding:8px 0}
      .topbar .container,.topbar-info{gap:8px;flex-direction:column;align-items:flex-start}
      .open-btn{display:none}
      .download-hero{padding:55px 0 48px}
      .download-hero h1{font-size:34px}
      .download-hero p{font-size:14px}
      .steps,.faq-list{grid-template-columns:1fr}
      .platform-list{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px 18px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:6px}
    }
    @media(max-width:450px){
      .footer-grid{grid-template-columns:1fr}
      .mega-grid{grid-template-columns:1fr}
    }