:root{--theme:#0B3D91;--theme-dark:#07285f;--theme-light:#eaf2ff;--accent:#20c77a;--ink:#172033;--muted:#687386;--line:#dce3ed;--surface:#fff;--soft:#f5f8fc;--radius:18px;--shadow:0 16px 45px rgba(11,61,145,.12)}
    *{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:1.65}
    body,a,button,input{font-family:inherit}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button{color:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{position:relative;z-index:1002;color:#dce9ff;background:#061a3a;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar a{margin-left:22px;color:#dce9ff;transition:.2s}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:1000;background:rgba(255,255,255,.98);border-bottom:1px solid var(--line);box-shadow:0 5px 20px rgba(15,35,66,.05)}
    .header-inner{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--theme);font-size:20px;font-weight:800}
    .logo img{width:40px;height:40px;object-fit:contain}
    .main-nav{align-self:stretch;display:flex;align-items:stretch;margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:2px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative;display:flex;align-items:center}
    .nav-link{height:100%;display:flex;align-items:center;padding:0 12px;font-size:15px;font-weight:650;white-space:nowrap;transition:.2s}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:-4px 0 0 7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;visibility:hidden;opacity:0;pointer-events:none;transform:translate(-50%,10px);background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:0 22px 50px rgba(14,37,72,.16);transition:opacity .2s,transform .2s,visibility .2s}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-10px;height:10px}
    .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;pointer-events:auto;transform:translate(-50%,0)}
    .dropdown-panel{width:310px;padding:12px}
    .dropdown-panel>a{display:block;padding:10px 12px;border-radius:9px;color:#344157;font-size:14px}
    .dropdown-panel>a:hover{color:var(--theme);background:var(--theme-light)}
    .dropdown-panel>a:last-child{margin-top:6px;color:var(--theme);font-weight:700;border-top:1px solid var(--line);border-radius:0}
    .mega-menu{width:min(760px,90vw);padding:22px;left:auto;right:-180px;transform:translateY(10px)}
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{transform:translateY(0)}
    .mega-title{margin:0 0 12px;color:#192944;font-size:14px;font-weight:800}
    .mega-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
    .mega-card{min-width:0;display:flex;align-items:center;gap:10px;padding:10px;border:1px solid #e8edf4;border-radius:12px;transition:.2s}
    .mega-card:hover{border-color:#9bb8e4;background:#f6f9ff;transform:translateY(-2px)}
    .mega-card img{width:44px;height:44px;flex:0 0 44px;border-radius:9px;object-fit:cover;background:#edf2f8}
    .mega-card>span{min-width:0}
    .mega-card b,.mega-card span span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card b{font-size:14px}
    .mega-card span span{color:var(--muted);font-size:12px}
    .mega-links{display:flex;flex-wrap:wrap;gap:8px}
    .mega-links a{padding:7px 11px;color:#40506a;background:#f2f5f9;border-radius:999px;font-size:13px}
    .mega-links a:hover{color:#fff;background:var(--theme)}
    .mega-footer{display:block;margin-top:16px;padding-top:13px;color:var(--theme);border-top:1px solid var(--line);font-weight:750;font-size:14px}
    .header-btns{display:flex;align-items:center;gap:10px;flex:0 0 auto;font-size:14px}
    .header-btns>a:first-child{color:var(--theme);font-weight:700}
    .account-btn{padding:10px 16px;color:#fff!important;background:var(--theme);border-radius:9px;font-weight:750;box-shadow:0 7px 18px rgba(11,61,145,.22)}
    .account-btn:hover{background:var(--theme-dark)}
    .hamburger{width:42px;height:42px;display:none;align-items:center;justify-content:center;flex-direction:column;gap:5px;padding:0;background:#fff;border:1px solid var(--line);border-radius:10px;cursor:pointer}
    .hamburger span{width:20px;height:2px;background:var(--ink);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{position:fixed;z-index:1090;inset:0;visibility:hidden;opacity:0;background:rgba(3,14,33,.56);transition:.25s}
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{position:fixed;z-index:1100;top:0;right:0;width:min(390px,90vw);height:100dvh;overflow-y:auto;background:#fff;box-shadow:-20px 0 50px rgba(0,0,0,.2);transform:translateX(105%);transition:.3s}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{position:sticky;top:0;z-index:2;min-height:70px;display:flex;align-items:center;gap:12px;padding:13px 18px;color:#fff;background:var(--theme)}
    .drawer-head>span{margin-right:auto;font-weight:700}
    .drawer-head>a{padding:7px 12px;background:#fff;color:var(--theme);border-radius:8px;font-weight:750}
    .drawer-close{width:38px;height:38px;padding:0;color:#fff;background:transparent;border:1px solid rgba(255,255,255,.4);border-radius:9px;font-size:27px;line-height:1;cursor:pointer}
    .drawer-menu{padding:12px 18px 30px}
    .drawer-link,.drawer-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 4px;background:none;border:0;border-bottom:1px solid var(--line);font-size:15px;font-weight:700;text-align:left;cursor:pointer}
    .drawer-toggle:after{content:"+";font-size:20px;color:var(--theme)}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:7px 0 10px 13px;border-left:2px solid #c7d8f1}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:9px 8px;color:#536077;font-size:14px}
    .drawer-submenu a:hover{color:var(--theme);background:var(--theme-light)}

    .target-page-main.download-page-main{min-height:620px;background:linear-gradient(180deg,#f6f9ff 0,#fff 42%)}
    .download-page-main .download-hero{position:relative;overflow:hidden;padding:82px 0 70px;color:#fff;background:radial-gradient(circle at 85% 0,rgba(36,118,255,.42),transparent 32%),linear-gradient(135deg,#061a3a,#0B3D91 62%,#0757b8)}
    .download-page-main .download-hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:38px 38px}
    .download-page-main .hero-copy{position:relative;z-index:1;max-width:850px;margin:auto;text-align:center}
    .download-page-main .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;padding:7px 14px;color:#bfe2ff;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);border-radius:999px;font-size:13px;font-weight:750}
    .download-page-main .eyebrow:before{content:"";width:8px;height:8px;background:var(--accent);border-radius:50%;box-shadow:0 0 14px var(--accent)}
    .download-page-main h1{margin:0;font-size:clamp(34px,5vw,58px);line-height:1.15;letter-spacing:-1px}
    .download-page-main .hero-copy>p{max-width:720px;margin:20px auto 0;color:#d9e8ff;font-size:17px}
    .download-page-main .hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:30px}
    .download-page-main .primary-btn,.download-page-main .secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:10px;font-weight:800;transition:.2s}
    .download-page-main .primary-btn{color:#052c23;background:var(--accent);box-shadow:0 12px 30px rgba(32,199,122,.25)}
    .download-page-main .primary-btn:hover{background:#45dc96;transform:translateY(-2px)}
    .download-page-main .secondary-btn{color:#fff;border:1px solid rgba(255,255,255,.38);background:rgba(255,255,255,.08)}
    .download-page-main .secondary-btn:hover{background:rgba(255,255,255,.15)}
    .download-page-main .safety-strip{position:relative;z-index:2;display:grid;grid-template-columns:repeat(3,1fr);margin-top:-24px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
    .download-page-main .safety-item{padding:22px;text-align:center}
    .download-page-main .safety-item+ .safety-item{border-left:1px solid var(--line)}
    .download-page-main .safety-item b{display:block;color:var(--theme);font-size:16px}
    .download-page-main .safety-item span{color:var(--muted);font-size:13px}
    .download-page-main .section{padding:76px 0}
    .download-page-main .section-soft{background:var(--soft)}
    .download-page-main .section-head{max-width:720px;margin:0 auto 35px;text-align:center}
    .download-page-main .section-head .kicker{color:var(--theme);font-size:13px;font-weight:850;letter-spacing:2px}
    .download-page-main .section-head h2{margin:8px 0 10px;font-size:clamp(27px,4vw,38px);line-height:1.25}
    .download-page-main .section-head p{margin:0;color:var(--muted)}
    .download-page-main .platform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .download-page-main .platform-card{position:relative;display:flex;flex-direction:column;min-height:300px;padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 35px rgba(20,42,80,.07);transition:.25s}
    .download-page-main .platform-card:hover{border-color:#9ab8e5;transform:translateY(-5px);box-shadow:var(--shadow)}
    .download-page-main .platform-icon{width:58px;height:58px;display:grid;place-items:center;margin-bottom:21px;color:#fff;background:linear-gradient(145deg,var(--theme),#1673dc);border-radius:15px;font-size:24px;font-weight:900}
    .download-page-main .platform-card h3{margin:0 0 8px;font-size:21px}
    .download-page-main .platform-card p{margin:0 0 18px;color:var(--muted);font-size:14px}
    .download-page-main .platform-meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto;margin-bottom:18px}
    .download-page-main .platform-meta span{padding:5px 9px;color:#53627a;background:#f0f4f9;border-radius:7px;font-size:12px}
    .download-page-main .card-action{display:flex;align-items:center;justify-content:center;min-height:44px;color:#fff;background:var(--theme);border-radius:9px;font-weight:800}
    .download-page-main .card-action:hover{background:var(--theme-dark)}
    .download-page-main .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:step}
    .download-page-main .step{position:relative;padding:26px 22px;background:#fff;border:1px solid var(--line);border-radius:15px}
    .download-page-main .step:before{counter-increment:step;content:"0" counter(step);display:block;margin-bottom:16px;color:#9eb7dc;font-size:28px;font-weight:900;line-height:1}
    .download-page-main .step:not(:last-child):after{content:"";position:absolute;top:39px;right:-17px;z-index:2;width:18px;height:2px;background:#91acd2}
    .download-page-main .step h3{margin:0 0 7px;font-size:17px}
    .download-page-main .step p{margin:0;color:var(--muted);font-size:14px}
    .download-page-main .requirements{display:grid;grid-template-columns:1.05fr .95fr;gap:24px;align-items:stretch}
    .download-page-main .require-card,.download-page-main .notice-card{padding:30px;border-radius:var(--radius)}
    .download-page-main .require-card{background:#fff;border:1px solid var(--line)}
    .download-page-main .notice-card{color:#fff;background:linear-gradient(145deg,#071d41,#0B3D91)}
    .download-page-main .require-card h2,.download-page-main .notice-card h2{margin:0 0 18px;font-size:25px}
    .download-page-main .require-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
    .download-page-main .require-list li{display:flex;justify-content:space-between;gap:20px;padding-bottom:11px;color:#4f5c70;border-bottom:1px dashed var(--line)}
    .download-page-main .require-list b{color:var(--ink)}
    .download-page-main .notice-card p{color:#d8e7ff}
    .download-page-main .notice-card ul{padding-left:20px;color:#e6f0ff}
    .download-page-main .notice-card a{display:inline-flex;margin-top:10px;padding:11px 17px;color:#062d25;background:var(--accent);border-radius:9px;font-weight:800}
    .download-page-main .faq-list{max-width:900px;margin:auto;display:grid;gap:13px}
    .download-page-main details{background:#fff;border:1px solid var(--line);border-radius:13px;padding:0 20px}
    .download-page-main summary{position:relative;padding:19px 35px 19px 0;font-weight:800;cursor:pointer;list-style:none}
    .download-page-main summary::-webkit-details-marker{display:none}
    .download-page-main summary:after{content:"+";position:absolute;right:0;top:15px;color:var(--theme);font-size:24px}
    .download-page-main details[open] summary:after{content:"−"}
    .download-page-main details p{margin:0;padding:0 0 19px;color:var(--muted)}
    .download-page-main .final-cta{padding:70px 0}
    .download-page-main .cta-panel{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:38px 42px;color:#fff;background:linear-gradient(115deg,#082554,#0B3D91);border-radius:22px;box-shadow:var(--shadow)}
    .download-page-main .cta-panel h2{margin:0 0 7px;font-size:29px}
    .download-page-main .cta-panel p{margin:0;color:#d7e6ff}
    .download-page-main .cta-panel a{flex:0 0 auto;padding:13px 22px;color:#062d25;background:var(--accent);border-radius:10px;font-weight:850}

    .footer{color:#c9d6e9;background:#06162f;padding:64px 0 0}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px}
    .footer h3{margin:0 0 16px;color:#fff;font-size:23px}
    .footer h4{margin:0 0 17px;color:#fff;font-size:15px}
    .footer p{margin:7px 0;color:#9fb0c8;font-size:14px}
    .footer-grid>div>a{display:block;margin:9px 0;color:#b8c7db;font-size:14px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:25px;margin-top:43px;padding:20px 0;color:#879ab5;border-top:1px solid rgba(255,255,255,.1);font-size:13px}

    @media(max-width:1100px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-btns{margin-left:auto}
      .download-page-main .platform-grid{grid-template-columns:repeat(2,1fr)}
      .download-page-main .platform-card:last-child{grid-column:1/-1}
    }
    @media(max-width:820px){
      .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar a{margin:0 16px 0 0}
      .header-inner{height:70px}
      .header-btns>a:first-child{display:none}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
      .download-page-main .steps{grid-template-columns:repeat(2,1fr)}
      .download-page-main .step:not(:last-child):after{display:none}
      .download-page-main .requirements{grid-template-columns:1fr}
      .download-page-main .cta-panel{align-items:flex-start;flex-direction:column}
    }
    @media(max-width:600px){
      .container{width:min(100% - 28px,1180px)}
      .logo span{max-width:135px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
      .account-btn{display:none}
      .download-page-main .download-hero{padding:60px 0 56px}
      .download-page-main .hero-copy>p{font-size:15px}
      .download-page-main .hero-actions{flex-direction:column}
      .download-page-main .hero-actions a{width:100%}
      .download-page-main .safety-strip{grid-template-columns:1fr;margin-top:-17px}
      .download-page-main .safety-item{padding:15px}
      .download-page-main .safety-item+ .safety-item{border-left:0;border-top:1px solid var(--line)}
      .download-page-main .section{padding:58px 0}
      .download-page-main .platform-grid,.download-page-main .steps{grid-template-columns:1fr}
      .download-page-main .platform-card:last-child{grid-column:auto}
      .download-page-main .platform-card{min-height:0}
      .download-page-main .require-card,.download-page-main .notice-card{padding:23px}
      .download-page-main .require-list li{align-items:flex-start;flex-direction:column;gap:3px}
      .download-page-main .cta-panel{padding:29px 23px}
      .footer{padding-top:48px}
      .footer-grid{grid-template-columns:1fr;gap:27px}
      .footer-bottom{flex-direction:column}
    }