:root{
      --theme:#0B3D91;
      --theme-token:{主题色};
      --theme-dark:#072b68;
      --theme-light:#eaf1fc;
      --ink:#172033;
      --muted:#667085;
      --line:#e3e8f1;
      --surface:#ffffff;
      --soft:#f5f7fb;
      --success:#26734d;
      --shadow:0 18px 45px rgba(11,61,145,.12);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:#fff;
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;
      line-height:1.65;
    }
    body,button,input{font:inherit}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{color:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      position:relative;
      z-index:120;
      color:#dce8ff;
      background:#071c3f;
      font-size:13px;
    }
    .topbar .container{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-links{display:flex;align-items:center;gap:22px}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:110;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 20px rgba(19,35,61,.04);
    }
    .header-inner{
      min-height:82px;
      display:flex;
      align-items:center;
      gap:25px;
    }
    .logo{
      min-width:180px;
      display:flex;
      align-items:center;
      gap:11px;
      color:var(--theme);
      font-size:20px;
      font-weight:800;
      letter-spacing:.02em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:9px;
    }
    .main-nav{margin-left:auto;align-self:stretch}
    .nav-list{
      height:100%;
      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;
      color:#28364c;
      font-size:15px;
      font-weight:650;
      white-space:nowrap;
      transition:.2s ease;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link{
      color:var(--theme);
      background:var(--theme-light);
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin-left:7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg) translateY(-2px);
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:50%;
      z-index:130;
      visibility:hidden;
      opacity:0;
      transform:translate(-50%,10px);
      pointer-events:none;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 18px 18px;
      box-shadow:0 24px 60px rgba(12,32,65,.16);
      transition:opacity .18s ease,transform .18s ease,visibility .18s;
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:12px;
    }
    .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;
      transform:translate(-50%,0);
      pointer-events:auto;
    }
    .dropdown-panel{width:330px;padding:20px}
    .mega-menu{
      width:min(880px,calc(100vw - 48px));
      padding:24px;
    }
    .nav-item:nth-last-child(-n+3) .mega-menu{left:auto;right:-100px;transform:translateY(10px)}
    .nav-item:nth-last-child(-n+3):hover>.mega-menu,
    .nav-item:nth-last-child(-n+3):focus-within>.mega-menu{transform:translateY(0)}
    .dropdown-title,.mega-heading{
      margin:0 0 14px;
      color:#192842;
      font-weight:800;
    }
    .dropdown-list{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .dropdown-list a{
      padding:8px 11px;
      color:#475467;
      background:#f4f6fa;
      border-radius:8px;
      font-size:13px;
    }
    .dropdown-list a:hover{color:var(--theme);background:var(--theme-light)}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }
    .mega-card{
      min-width:0;
      display:grid;
      grid-template-columns:48px minmax(0,1fr);
      align-content:start;
      column-gap:11px;
      padding:13px;
      border:1px solid #e8ecf3;
      border-radius:12px;
      background:#fff;
      transition:.2s ease;
    }
    .mega-card:hover{
      border-color:#adc5ec;
      box-shadow:0 10px 25px rgba(11,61,145,.1);
      transform:translateY(-2px);
    }
    .mega-card img{
      grid-row:1/4;
      width:48px;
      height:48px;
      object-fit:cover;
      border-radius:9px;
      background:#f0f3f7;
    }
    .mega-card strong{
      overflow:hidden;
      color:#20304b;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card small{
      overflow:hidden;
      color:#718096;
      font-size:12px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-footer{
      display:block;
      margin-top:17px;
      padding-top:14px;
      color:var(--theme);
      border-top:1px solid var(--line);
      text-align:right;
      font-weight:750;
    }
    .header-btns{display:flex;align-items:center;gap:9px}
    .member-link,.open-account{
      padding:9px 14px;
      border-radius:9px;
      font-size:14px;
      font-weight:750;
      white-space:nowrap;
    }
    .member-link{color:var(--theme);background:var(--theme-light)}
    .open-account{color:#fff;background:var(--theme)}
    .open-account: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 ease;
    }
    .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:190;
      visibility:hidden;
      opacity:0;
      background:rgba(4,15,35,.55);
      backdrop-filter:blur(3px);
      transition:.25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      z-index:200;
      width:min(390px,90vw);
      height:100vh;
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 60px rgba(0,0,0,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:12px;
      padding:16px 20px;
      color:#fff;
      background:var(--theme);
    }
    .drawer-head>a{font-weight:750}
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      color:#fff;
      background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.3);
      border-radius:50%;
      font-size:26px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:14px 20px 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-weight:750;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      color:var(--theme);
      font-size:20px;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      padding:0 10px;
      background:#f7f9fc;
      transition:max-height .3s ease,padding .3s ease;
    }
    .drawer-submenu.open{max-height:700px;padding:8px 10px}
    .drawer-submenu a{
      display:block;
      padding:9px 5px;
      color:#536174;
      border-bottom:1px dashed #dfe5ee;
      font-size:14px;
    }

    .target-page-main.download-page-main{
      min-width:0;
      overflow:hidden;
      background:linear-gradient(180deg,#f6f8fc 0,#fff 430px);
    }
    .download-page-main .download-hero{
      position:relative;
      isolation:isolate;
      padding:88px 0 82px;
      color:#fff;
      overflow:hidden;
      background:
        radial-gradient(circle at 15% 15%,rgba(118,160,229,.48),transparent 28%),
        radial-gradient(circle at 85% 40%,rgba(57,114,206,.35),transparent 30%),
        linear-gradient(135deg,#061b3d,#0B3D91 58%,#174f9e);
    }
    .download-page-main .download-hero::before,
    .download-page-main .download-hero::after{
      content:"";
      position:absolute;
      z-index:-1;
      border:1px solid rgba(255,255,255,.16);
      border-radius:50%;
    }
    .download-page-main .download-hero::before{
      width:520px;
      height:520px;
      top:-350px;
      left:calc(50% - 260px);
    }
    .download-page-main .download-hero::after{
      width:760px;
      height:280px;
      right:-260px;
      bottom:-180px;
    }
    .download-page-main .hero-copy{
      width:min(790px,100%);
      margin:auto;
      text-align:center;
    }
    .download-page-main .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:17px;
      padding:7px 13px;
      color:#dce9ff;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.22);
      border-radius:999px;
      font-size:14px;
      font-weight:700;
    }
    .download-page-main .eyebrow::before{
      content:"";
      width:8px;
      height:8px;
      background:#8fc8a9;
      border-radius:50%;
      box-shadow:0 0 0 5px rgba(143,200,169,.15);
    }
    .download-page-main h1{
      margin:0;
      font-size:clamp(36px,5vw,62px);
      line-height:1.12;
      letter-spacing:-.04em;
    }
    .download-page-main .hero-copy>p{
      max-width:690px;
      margin:21px auto 28px;
      color:#d6e3f8;
      font-size:18px;
    }
    .download-page-main .hero-actions{
      display:flex;
      justify-content:center;
      flex-wrap:wrap;
      gap:12px;
    }
    .download-page-main .primary-action,
    .download-page-main .secondary-action{
      min-height:48px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 22px;
      border-radius:11px;
      font-weight:800;
      transition:.2s ease;
    }
    .download-page-main .primary-action{color:var(--theme);background:#fff}
    .download-page-main .secondary-action{
      color:#fff;
      border:1px solid rgba(255,255,255,.38);
      background:rgba(255,255,255,.08);
    }
    .download-page-main .primary-action:hover,
    .download-page-main .secondary-action:hover{transform:translateY(-2px)}
    .download-page-main .hero-note{
      margin-top:20px;
      color:#afc7ed;
      font-size:13px;
    }

    .download-page-main .platform-section{
      position:relative;
      z-index:2;
      padding:0 0 80px;
    }
    .download-page-main .platform-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:20px;
      margin-top:-36px;
    }
    .download-page-main .platform-card{
      position:relative;
      min-width:0;
      padding:28px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .download-page-main .platform-icon{
      width:54px;
      height:54px;
      display:grid;
      place-items:center;
      margin-bottom:20px;
      color:var(--theme);
      background:var(--theme-light);
      border-radius:15px;
      font-size:24px;
      font-weight:900;
    }
    .download-page-main .platform-badge{
      position:absolute;
      top:24px;
      right:24px;
      padding:5px 9px;
      color:var(--success);
      background:#eaf7f0;
      border-radius:999px;
      font-size:12px;
      font-weight:800;
    }
    .download-page-main .platform-card h2{margin:0 0 8px;font-size:22px}
    .download-page-main .platform-card p{margin:0 0 18px;color:var(--muted)}
    .download-page-main .requirements{
      min-height:58px;
      margin:0 0 20px;
      padding:13px 0;
      color:#475467;
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
      font-size:13px;
    }
    .download-page-main .card-action{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--theme);
      font-weight:800;
    }
    .download-page-main .card-action::after{content:"→";transition:.2s ease}
    .download-page-main .card-action:hover::after{transform:translateX(4px)}

    .download-page-main .section{padding:82px 0}
    .download-page-main .section-soft{background:var(--soft)}
    .download-page-main .section-heading{
      max-width:710px;
      margin:0 auto 42px;
      text-align:center;
    }
    .download-page-main .section-heading span{
      color:var(--theme);
      font-size:13px;
      font-weight:850;
      letter-spacing:.14em;
    }
    .download-page-main .section-heading h2{
      margin:8px 0 11px;
      font-size:clamp(29px,4vw,42px);
      line-height:1.2;
    }
    .download-page-main .section-heading p{margin:0;color:var(--muted)}
    .download-page-main .steps{
      position:relative;
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:28px;
    }
    .download-page-main .steps::before{
      content:"";
      position:absolute;
      top:31px;
      right:16.6%;
      left:16.6%;
      height:2px;
      background:linear-gradient(90deg,#a9bee0,var(--theme),#a9bee0);
    }
    .download-page-main .step{
      position:relative;
      z-index:1;
      text-align:center;
    }
    .download-page-main .step-number{
      width:64px;
      height:64px;
      display:grid;
      place-items:center;
      margin:0 auto 19px;
      color:#fff;
      background:var(--theme);
      border:8px solid #e8eef8;
      border-radius:50%;
      font-size:17px;
      font-weight:900;
    }
    .download-page-main .step h3{margin:0 0 8px;font-size:20px}
    .download-page-main .step p{margin:0;color:var(--muted)}

    .download-page-main .safety-panel{
      display:grid;
      grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);
      gap:45px;
      align-items:center;
      padding:42px;
      color:#fff;
      background:#14223b;
      border-radius:24px;
      box-shadow:0 25px 60px rgba(10,29,59,.2);
    }
    .download-page-main .safety-panel h2{
      margin:0 0 12px;
      font-size:clamp(28px,4vw,40px);
      line-height:1.2;
    }
    .download-page-main .safety-panel p{margin:0;color:#c5d1e4}
    .download-page-main .safety-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .download-page-main .safety-list li{
      position:relative;
      padding:12px 14px 12px 43px;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(255,255,255,.1);
      border-radius:11px;
    }
    .download-page-main .safety-list li::before{
      content:"✓";
      position:absolute;
      top:12px;
      left:16px;
      color:#90dbb1;
      font-weight:900;
    }

    .download-page-main .faq-list{
      max-width:900px;
      margin:auto;
      display:grid;
      gap:13px;
    }
    .download-page-main details{
      padding:0 22px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:14px;
      box-shadow:0 7px 20px rgba(18,42,75,.04);
    }
    .download-page-main summary{
      position:relative;
      padding:20px 35px 20px 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;
      top:17px;
      right:0;
      color:var(--theme);
      font-size:24px;
    }
    .download-page-main details[open] summary::after{content:"−"}
    .download-page-main details p{
      margin:0;
      padding:0 0 20px;
      color:var(--muted);
      border-top:1px solid var(--line);
      padding-top:15px;
    }
    .download-page-main .final-cta{
      padding:0 0 90px;
      text-align:center;
    }
    .download-page-main .cta-box{
      padding:48px 25px;
      background:linear-gradient(135deg,#eef4fd,#f8fafc);
      border:1px solid #d8e3f4;
      border-radius:24px;
    }
    .download-page-main .cta-box h2{margin:0 0 10px;font-size:32px}
    .download-page-main .cta-box p{margin:0 auto 23px;color:var(--muted)}
    .download-page-main .cta-box .primary-action{color:#fff;background:var(--theme)}

    .footer{
      padding:65px 0 0;
      color:#c8d3e3;
      background:#091a33;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr 1fr 1fr 1.15fr;
      gap:40px;
      padding-bottom:45px;
    }
    .footer h3{margin:0 0 17px;color:#fff;font-size:17px}
    .footer p{margin:7px 0;color:#aebbd0;font-size:14px}
    .footer-brand p{max-width:340px}
    .footer-links{display:flex;flex-direction:column;align-items:flex-start;gap:9px}
    .footer a:hover{color:#fff}
    .footer-bottom{
      padding:20px 0;
      color:#96a6bd;
      border-top:1px solid rgba(255,255,255,.1);
      text-align:center;
      font-size:13px;
    }

    @media (max-width:1120px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-btns{margin-left:auto}
    }
    @media (max-width:860px){
      .download-page-main .platform-grid{grid-template-columns:1fr;margin-top:-28px}
      .download-page-main .platform-card{padding:24px}
      .download-page-main .steps{grid-template-columns:1fr;gap:35px}
      .download-page-main .steps::before{
        top:32px;
        bottom:32px;
        left:50%;
        width:2px;
        height:auto;
        background:linear-gradient(#a9bee0,var(--theme),#a9bee0);
      }
      .download-page-main .step{
        width:min(470px,100%);
        margin:auto;
        padding:0 20px 18px;
        background:var(--soft);
      }
      .download-page-main .safety-panel{grid-template-columns:1fr;padding:32px}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:7px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-links{gap:4px;align-items:flex-start;flex-direction:column}
      .header-inner{min-height:70px;gap:10px}
      .logo{min-width:0;font-size:17px}
      .logo img{width:37px;height:37px}
      .member-link{display:none}
      .open-account{padding:8px 11px}
      .download-page-main .download-hero{padding:68px 0 65px}
      .download-page-main .hero-copy>p{font-size:16px}
      .download-page-main .hero-actions{flex-direction:column}
      .download-page-main .primary-action,
      .download-page-main .secondary-action{width:100%}
      .download-page-main .section{padding:65px 0}
      .download-page-main .safety-panel{padding:27px 20px}
      .download-page-main .platform-badge{position:static;display:inline-block;margin-bottom:12px}
      .download-page-main .cta-box{padding:38px 18px}
      .footer-grid{grid-template-columns:1fr;gap:30px}
    }