:root{
      --theme:#0B3D91;
      --deep:#071a36;
      --ice:#edf7ff;
      --silver:#dce8f2;
      --text:#14243a;
      --muted:#66788e;
      --line:#dbe5ef;
      --white:#fff;
      --shadow:0 16px 42px rgba(7,35,76,.12);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:#f7fbff;
      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{
      background:var(--deep);
      color:#d9e7f5;
      font-size:13px;
    }
    .topbar .container{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-info{display:flex;gap:22px}
    .topbar a{color:#d9e7f5}
    .topbar a:hover{color:#fff}

    .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:28px;
    }
    .logo{
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--deep);
      font-weight:800;
      font-size:19px;
      white-space:nowrap;
    }
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{
      display:flex;
      align-items:center;
      gap:3px;
      padding:0;
      margin:0;
      list-style:none;
    }
    .nav-item{position:relative}
    .nav-link{
      display:flex;
      align-items:center;
      gap:6px;
      padding:25px 13px;
      color:#29415d;
      font-size:14px;
      white-space:nowrap;
    }
    .nav-link:hover{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:calc(100% - 1px);
      left:50%;
      transform:translateX(-50%) translateY(8px);
      opacity:0;
      visibility:hidden;
      transition:.2s ease;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      border-radius:0 0 14px 14px;
      z-index:30;
    }
    .dropdown-panel{width:245px;padding:12px}
    .dropdown-panel a{
      display:block;
      padding:9px 11px;
      border-radius:8px;
      font-size:13px;
    }
    .dropdown-panel a:hover{background:var(--ice);color:var(--theme)}
    .mega-menu{width:650px;padding:22px}
    .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);
    }
    .nav-item:after{
      content:"";
      position:absolute;
      left:0;
      right:0;
      height:14px;
      bottom:-7px;
    }
    .mega-title{
      color:var(--deep);
      font-size:14px;
      font-weight:800;
      margin-bottom:13px;
    }
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:10px;
    }
    .mega-card{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:0;
      padding:10px;
      border:1px solid #e3edf5;
      border-radius:10px;
      background:#fbfdff;
    }
    .mega-card:hover{border-color:#9dbce0;background:var(--ice)}
    .mega-card img{
      width:36px;
      height:36px;
      flex:0 0 36px;
      object-fit:contain;
      border-radius:7px;
    }
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{
      display:block;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .mega-card strong{font-size:13px;white-space:nowrap}
    .mega-card small{
      color:var(--muted);
      font-size:11px;
      line-height:1.5;
      display:-webkit-box;
      -webkit-line-clamp:2;
      -webkit-box-orient:vertical;
    }
    .mega-links{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .mega-links a{
      padding:6px 10px;
      border-radius:20px;
      background:var(--ice);
      color:var(--theme);
      font-size:12px;
    }
    .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-link{font-size:13px;color:var(--theme)}
    .open-account{
      padding:8px 15px;
      background:var(--theme);
      color:#fff;
      border-radius:8px;
      font-size:13px;
    }
    .hamburger{
      display:none;
      width:42px;
      height:40px;
      padding:8px;
      border:1px solid var(--line);
      border-radius:8px;
      background:#fff;
      cursor:pointer;
    }
    .hamburger span{
      display:block;
      height:2px;
      margin:5px 0;
      background:var(--deep);
      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{
      position:fixed;
      inset:0;
      z-index:40;
      background:rgba(2,17,38,.45);
      opacity:0;
      visibility:hidden;
      transition:.25s;
    }
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:41;
      width:min(390px,88vw);
      padding:20px;
      overflow-y:auto;
      background:#fff;
      box-shadow:-16px 0 40px rgba(0,0,0,.16);
      transform:translateX(105%);
      transition:.25s;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      display:flex;
      align-items:center;
      gap:14px;
      padding-bottom:18px;
      border-bottom:1px solid var(--line);
      font-weight:800;
    }
    .drawer-head>a{
      margin-left:auto;
      color:var(--theme);
      font-size:13px;
    }
    .drawer-close{
      width:34px;
      height:34px;
      border:0;
      border-radius:8px;
      background:var(--ice);
      color:var(--deep);
      font-size:25px;
      cursor:pointer;
    }
    .drawer-menu{padding-top:12px}
    .drawer-link,.drawer-toggle{
      display:block;
      width:100%;
      padding:12px 4px;
      border:0;
      border-bottom:1px solid #edf2f6;
      background:transparent;
      color:var(--text);
      text-align:left;
      cursor:pointer;
      font-size:15px;
    }
    .drawer-toggle:after{
      content:"+";
      float:right;
      color:var(--theme);
      font-size:20px;
      line-height:1;
    }
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:5px 12px 8px;
      background:#f7fbff;
      border-radius:8px;
    }
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;
      padding:7px 0;
      color:var(--muted);
      font-size:13px;
    }

    .download-page-main{
      min-height:650px;
      padding:72px 0 90px;
      background:
        radial-gradient(circle at 12% 15%,rgba(142,202,255,.22),transparent 28%),
        linear-gradient(180deg,#f5fbff 0%,#fff 72%);
    }
    .download-hero{
      max-width:850px;
      margin:0 auto 42px;
      text-align:center;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:6px 13px;
      border:1px solid #b9d8f4;
      border-radius:30px;
      background:#eef8ff;
      color:var(--theme);
      font-size:13px;
      font-weight:700;
    }
    .eyebrow:before{
      content:"";
      width:7px;
      height:7px;
      border-radius:50%;
      background:#35a7e8;
      box-shadow:0 0 0 4px rgba(53,167,232,.12);
    }
    .download-hero h1{
      margin:18px 0 12px;
      color:var(--deep);
      font-size:clamp(30px,5vw,52px);
      line-height:1.18;
      letter-spacing:-1px;
    }
    .download-hero p{
      max-width:680px;
      margin:0 auto;
      color:var(--muted);
      font-size:16px;
    }
    .download-layout{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:26px;
      align-items:stretch;
    }
    .download-card{
      padding:30px;
      border:1px solid #dce9f4;
      border-radius:var(--radius);
      background:#fff;
      box-shadow:var(--shadow);
    }
    .download-card h2{
      margin:0 0 20px;
      color:var(--deep);
      font-size:22px;
    }
    .download-steps{
      display:grid;
      gap:15px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .download-steps li{
      display:grid;
      grid-template-columns:38px 1fr;
      gap:13px;
      align-items:start;
      padding:15px;
      border-radius:12px;
      background:#f5faff;
    }
    .step-num{
      display:grid;
      place-items:center;
      width:34px;
      height:34px;
      border-radius:50%;
      background:var(--theme);
      color:#fff;
      font-weight:800;
    }
    .download-steps strong{
      display:block;
      margin-bottom:2px;
      color:var(--deep);
    }
    .download-steps span{
      color:var(--muted);
      font-size:13px;
    }
    .download-entry{
      display:flex;
      flex-direction:column;
      justify-content:center;
      background:linear-gradient(150deg,var(--deep),#0b4f9d);
      color:#fff;
    }
    .download-entry h2{color:#fff}
    .download-entry p{color:#d9e8f7;font-size:14px}
    .entry-points{display:grid;gap:11px;margin:20px 0}
    .entry-points a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:13px 15px;
      border:1px solid rgba(255,255,255,.22);
      border-radius:10px;
      color:#fff;
      background:rgba(255,255,255,.08);
    }
    .entry-points a:hover{background:rgba(255,255,255,.16)}
    .entry-points small{color:#c7ddf2}
    .primary-btn{
      display:inline-flex;
      justify-content:center;
      align-items:center;
      padding:12px 20px;
      border:0;
      border-radius:9px;
      background:#fff;
      color:var(--theme);
      font-weight:800;
      cursor:pointer;
    }
    .download-faq{
      margin-top:26px;
      padding:28px 30px;
      border:1px solid #dce9f4;
      border-radius:var(--radius);
      background:#fff;
    }
    .download-faq h2{margin:0 0 15px;color:var(--deep);font-size:21px}
    .faq-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .faq-item{padding:16px;background:#f7fbff;border-radius:11px}
    .faq-item h3{margin:0 0 6px;font-size:15px;color:var(--deep)}
    .faq-item p{margin:0;color:var(--muted);font-size:13px}

    .footer{
      padding:52px 0 20px;
      background:var(--deep);
      color:#c8d7e7;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr 1fr 1fr 1fr;
      gap:35px;
    }
    .footer-brand{
      display:flex;
      align-items:center;
      gap:9px;
      color:#fff;
      font-size:18px;
      font-weight:800;
    }
    .footer-brand img{width:34px;height:34px;object-fit:contain}
    .footer p{margin:15px 0 0;font-size:13px;line-height:1.9;color:#aebfd1}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:8px;font-size:13px}
    .footer-links a:hover{color:#fff}
    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:18px;
      margin-top:38px;
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.14);
      color:#91a8be;
      font-size:12px;
    }

    @media (max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .download-layout{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{align-items:flex-start;flex-direction:column;gap:2px;padding:7px 0}
      .topbar-info{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:68px;gap:10px}
      .member-link{display:none}
      .open-account{padding:7px 10px;font-size:12px}
      .download-page-main{padding:48px 0 60px}
      .download-card,.download-faq{padding:22px 18px}
      .download-hero h1{font-size:34px}
      .download-hero p{font-size:14px}
      .faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{flex-direction:column;gap:6px}
    }