:root{
      --brand:#0B3D91;
      --template-theme:{主题色};
      --brand-dark:#072b68;
      --brand-soft:#eaf1fc;
      --ink:#152033;
      --muted:#667085;
      --line:#e4e8ef;
      --surface:#ffffff;
      --page:#f5f7fa;
      --success:#138a5b;
      --warning:#d88716;
      --shadow:0 18px 45px rgba(18,42,81,.10);
      --radius:18px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--page);
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;
      line-height:1.65;
    }
    body.drawer-locked{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dce7fa;
      background:#071b3b;
      font-size:13px;
    }
    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-contact{display:flex;align-items:center;gap:20px}
    .topbar a{transition:color .2s ease}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 4px 18px rgba(20,38,70,.04);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:28px;
    }
    .logo{
      display:inline-flex;
      align-items:center;
      gap:11px;
      flex:0 0 auto;
      color:var(--brand);
      font-size:20px;
      font-weight:800;
      letter-spacing:.01em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .main-nav{margin-left:auto;align-self:stretch}
    .nav-list{
      height:100%;
      margin:0;
      padding:0;
      display:flex;
      align-items:stretch;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }
    .nav-link{
      height:100%;
      padding:0 13px;
      display:flex;
      align-items:center;
      color:#27364d;
      font-size:15px;
      font-weight:650;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link{
      color:var(--brand);
      background:#f7f9fd;
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin:0 0 4px 8px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg);
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      right:0;
      z-index:80;
      visibility:hidden;
      opacity:0;
      pointer-events:none;
      transform:translateY(8px);
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 16px 16px;
      box-shadow:0 24px 60px rgba(16,38,76,.16);
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      left:0;
      right:0;
      top:-8px;
      height:8px;
    }
    .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:translateY(0);
    }
    .dropdown-panel{
      width:310px;
      padding:12px;
    }
    .dropdown-panel>a:not(.dropdown-footer){
      display:block;
      padding:10px 12px;
      color:#34425a;
      border-radius:9px;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .dropdown-panel>a:hover{color:var(--brand);background:var(--brand-soft)}
    .dropdown-footer,
    .mega-footer{
      display:block;
      margin-top:10px;
      padding:11px 14px;
      color:var(--brand);
      background:var(--brand-soft);
      border-radius:9px;
      font-size:14px;
      font-weight:700;
      text-align:center;
    }
    .mega-menu{
      width:min(850px,calc(100vw - 40px));
      padding:22px;
    }
    .nav-item:nth-last-child(-n+3) .mega-menu{right:0}
    .mega-title{
      margin:0 0 13px;
      color:#24334a;
      font-size:14px;
      font-weight:800;
    }
    .mega-category-list{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:16px;
    }
    .mega-category-list a{
      padding:7px 12px;
      color:#40506a;
      background:#f3f6fa;
      border-radius:999px;
      font-size:13px;
    }
    .mega-category-list a:hover{color:#fff;background:var(--brand)}
    .mega-grid{display:grid;gap:12px}
    .mega-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
    .mega-card{
      min-width:0;
      padding:11px;
      display:flex;
      align-items:flex-start;
      gap:11px;
      border:1px solid #edf0f5;
      border-radius:12px;
      transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
    }
    .mega-card:hover{
      transform:translateY(-2px);
      border-color:#bfd0ed;
      box-shadow:0 10px 25px rgba(11,61,145,.08);
    }
    .mega-card>img{
      width:46px;
      height:46px;
      flex:0 0 46px;
      object-fit:cover;
      border-radius:9px;
      background:#eef2f7;
    }
    .mega-card>span{min-width:0}
    .mega-card strong,
    .mega-card small{
      display:block;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .mega-card strong{
      color:#223047;
      font-size:14px;
      white-space:nowrap;
    }
    .mega-card small{
      margin-top:3px;
      color:var(--muted);
      font-size:12px;
      line-height:1.45;
      display:-webkit-box;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .mega-meta{
      margin-top:5px;
      display:flex;
      flex-wrap:wrap;
      gap:5px 9px;
      color:#708097;
      font-size:11px;
    }
    .header-btns{
      display:flex;
      align-items:center;
      gap:10px;
      flex:0 0 auto;
    }
    .account-entry{display:inline-flex;align-items:center}
    .open-account{
      padding:9px 17px;
      color:#fff;
      background:var(--brand);
      border-radius:9px;
      font-size:14px;
      font-weight:700;
      box-shadow:0 7px 18px rgba(11,61,145,.2);
    }
    .open-account:hover{background:var(--brand-dark)}
    .hamburger{
      width:42px;
      height:42px;
      padding:0;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      border:1px solid var(--line);
      border-radius:10px;
      background:#fff;
      cursor:pointer;
    }
    .hamburger span{
      width:19px;
      height:2px;
      background:#223047;
      border-radius:2px;
      transition:transform .2s ease,opacity .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:90;
      visibility:hidden;
      opacity:0;
      background:rgba(7,20,43,.56);
      backdrop-filter:blur(2px);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:100;
      width:min(390px,90vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 55px rgba(11,28,58,.2);
      transform:translateX(105%);
      transition:transform .25s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:76px;
      padding:14px 18px;
      display:flex;
      align-items:center;
      gap:12px;
      color:#26354c;
      border-bottom:1px solid var(--line);
    }
    .drawer-head>a{
      margin-left:auto;
      padding:7px 13px;
      color:#fff;
      background:var(--brand);
      border-radius:8px;
      font-weight:700;
    }
    .drawer-close{
      width:38px;
      height:38px;
      padding:0;
      color:#44516a;
      background:#f2f4f7;
      border:0;
      border-radius:9px;
      font-size:27px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:12px 18px 28px}
    .drawer-link,
    .drawer-toggle{
      width:100%;
      min-height:48px;
      padding:11px 4px;
      display:flex;
      align-items:center;
      color:#25334a;
      background:none;
      border:0;
      border-bottom:1px solid #edf0f4;
      font-weight:700;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      margin-left:auto;
      color:var(--brand);
      font-size:20px;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:7px 0 10px 14px;
      border-bottom:1px solid #edf0f4;
    }
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;
      padding:8px 10px;
      color:#617087;
      border-radius:7px;
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--brand);background:var(--brand-soft)}

    .target-page-main.download-page-main{min-height:640px}
    .download-page-main .download-intro{
      position:relative;
      overflow:hidden;
      padding:76px 0 70px;
      color:#fff;
      background:
        radial-gradient(circle at 16% 20%,rgba(96,156,255,.28),transparent 29%),
        radial-gradient(circle at 86% 10%,rgba(255,255,255,.13),transparent 24%),
        linear-gradient(145deg,#071f4d 0%,var(--brand) 58%,#1767bc 100%);
    }
    .download-page-main .download-intro::after{
      content:"";
      position:absolute;
      right:-90px;
      bottom:-150px;
      width:420px;
      height:420px;
      border:1px solid rgba(255,255,255,.16);
      border-radius:50%;
      box-shadow:0 0 0 58px rgba(255,255,255,.035),0 0 0 116px rgba(255,255,255,.025);
    }
    .download-page-main .intro-content{
      position:relative;
      z-index:1;
      max-width:820px;
      margin:auto;
      text-align:center;
    }
    .download-page-main .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:16px;
      padding:7px 13px;
      border:1px solid rgba(255,255,255,.24);
      border-radius:999px;
      background:rgba(255,255,255,.09);
      font-size:13px;
      font-weight:700;
    }
    .download-page-main .eyebrow::before{
      content:"";
      width:8px;
      height:8px;
      background:#75aaff;
      border-radius:50%;
      box-shadow:0 0 0 5px rgba(117,170,255,.16);
    }
    .download-page-main h1{
      margin:0;
      font-size:clamp(34px,5vw,58px);
      line-height:1.18;
      letter-spacing:-.035em;
    }
    .download-page-main .intro-content>p{
      max-width:680px;
      margin:20px auto 0;
      color:#dbe8fb;
      font-size:17px;
    }
    .download-page-main .intro-actions{
      margin-top:30px;
      display:flex;
      justify-content:center;
      flex-wrap:wrap;
      gap:12px;
    }
    .download-page-main .primary-action,
    .download-page-main .secondary-action{
      min-height:48px;
      padding:11px 22px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:10px;
      font-weight:800;
    }
    .download-page-main .primary-action{
      color:var(--brand);
      background:#fff;
      box-shadow:0 12px 30px rgba(4,20,49,.24);
    }
    .download-page-main .secondary-action{
      color:#fff;
      border:1px solid rgba(255,255,255,.35);
      background:rgba(255,255,255,.08);
    }
    .download-page-main .security-note{
      margin-top:22px;
      color:#cbdaf2;
      font-size:13px;
    }

    .download-page-main .download-section{padding:70px 0}
    .download-page-main .section-heading{
      max-width:720px;
      margin:0 auto 34px;
      text-align:center;
    }
    .download-page-main .section-heading span{
      color:var(--brand);
      font-size:13px;
      font-weight:800;
      letter-spacing:.08em;
    }
    .download-page-main .section-heading h2{
      margin:8px 0 10px;
      color:#14233a;
      font-size:clamp(27px,3.5vw,38px);
      line-height:1.25;
    }
    .download-page-main .section-heading p{margin:0;color:var(--muted)}
    .download-page-main .platform-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:20px;
    }
    .download-page-main .platform-card{
      padding:28px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 12px 36px rgba(19,45,84,.06);
    }
    .download-page-main .platform-icon{
      width:54px;
      height:54px;
      display:grid;
      place-items:center;
      color:#fff;
      background:linear-gradient(145deg,var(--brand),#2f76cf);
      border-radius:15px;
      font-size:16px;
      font-weight:900;
    }
    .download-page-main .platform-card h3{margin:18px 0 7px;font-size:21px}
    .download-page-main .platform-card p{min-height:52px;margin:0;color:var(--muted);font-size:14px}
    .download-page-main .platform-meta{
      margin:20px 0;
      padding:13px 0;
      display:grid;
      gap:7px;
      color:#526078;
      border-top:1px solid #edf0f4;
      border-bottom:1px solid #edf0f4;
      font-size:13px;
    }
    .download-page-main .platform-meta span::before{
      content:"✓";
      margin-right:8px;
      color:var(--success);
      font-weight:900;
    }
    .download-page-main .card-action{
      width:100%;
      min-height:44px;
      display:flex;
      align-items:center;
      justify-content:center;
      color:#fff;
      background:var(--brand);
      border-radius:9px;
      font-weight:800;
    }
    .download-page-main .card-action:hover{background:var(--brand-dark)}

    .download-page-main .steps-wrap{
      padding:70px 0;
      background:#fff;
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
    }
    .download-page-main .steps-grid{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:18px;
      counter-reset:step;
    }
    .download-page-main .step-card{
      position:relative;
      padding:25px 22px;
      border:1px solid var(--line);
      border-radius:16px;
      background:#fbfcfe;
      counter-increment:step;
    }
    .download-page-main .step-card::before{
      content:"0" counter(step);
      display:block;
      margin-bottom:20px;
      color:var(--brand);
      font-size:27px;
      font-weight:900;
      letter-spacing:-.04em;
    }
    .download-page-main .step-card:not(:last-child)::after{
      content:"";
      position:absolute;
      top:42px;
      right:-19px;
      z-index:2;
      width:18px;
      border-top:2px dashed #bdcbe0;
    }
    .download-page-main .step-card h3{margin:0 0 7px;font-size:18px}
    .download-page-main .step-card p{margin:0;color:var(--muted);font-size:14px}

    .download-page-main .requirements{
      padding:70px 0;
    }
    .download-page-main .requirements-panel{
      padding:34px;
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:30px;
      background:#0d2349;
      border-radius:22px;
      box-shadow:var(--shadow);
    }
    .download-page-main .requirements-panel h2{
      margin:0 0 10px;
      color:#fff;
      font-size:30px;
    }
    .download-page-main .requirements-panel>div>p{margin:0;color:#bdcce4}
    .download-page-main .require-list{
      margin:0;
      padding:0;
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:12px;
      list-style:none;
    }
    .download-page-main .require-list li{
      padding:14px;
      color:#e7effc;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(255,255,255,.1);
      border-radius:11px;
      font-size:14px;
    }
    .download-page-main .require-list strong{display:block;color:#fff}

    .download-page-main .faq-section{padding:0 0 78px}
    .download-page-main .faq-list{max-width:880px;margin:0 auto;display:grid;gap:12px}
    .download-page-main details{
      overflow:hidden;
      background:#fff;
      border:1px solid var(--line);
      border-radius:13px;
    }
    .download-page-main summary{
      padding:18px 52px 18px 20px;
      position:relative;
      color:#213047;
      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:13px;
      right:18px;
      color:var(--brand);
      font-size:25px;
    }
    .download-page-main details[open] summary::after{content:"−"}
    .download-page-main details p{
      margin:0;
      padding:0 20px 19px;
      color:var(--muted);
    }
    .download-page-main .risk-box{
      max-width:880px;
      margin:24px auto 0;
      padding:16px 18px;
      color:#765013;
      background:#fff7e8;
      border:1px solid #f2d49d;
      border-radius:12px;
      font-size:13px;
    }

    .footer{
      color:#bdc8d9;
      background:#081a36;
    }
    .footer-main{padding:58px 0 42px}
    .footer-grid{
      display:grid;
      grid-template-columns:1.5fr .9fr .9fr 1.2fr;
      gap:44px;
    }
    .footer .logo{color:#fff}
    .footer-brand p{
      max-width:380px;
      margin:18px 0;
      color:#aebbcf;
      font-size:14px;
    }
    .footer-social{color:#d4dcea;font-size:14px}
    .footer h3{
      margin:5px 0 17px;
      color:#fff;
      font-size:16px;
    }
    .footer-links,
    .footer-contact{display:grid;gap:10px}
    .footer-links a,
    .footer-contact a{
      color:#b9c5d7;
      font-size:14px;
      transition:color .2s ease;
    }
    .footer-links a:hover,
    .footer-contact a:hover{color:#fff}
    .footer-contact span{font-size:13px}
    .footer-bottom{
      min-height:68px;
      padding:16px 0;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      border-top:1px solid rgba(255,255,255,.1);
      font-size:13px;
    }
    .footer-bottom-links{display:flex;gap:18px}

    @media (max-width:1120px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
      .download-page-main .platform-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .download-page-main .steps-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .download-page-main .step-card::after{display:none}
      .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
      .footer-grid>div:last-child{grid-column:1/-1}
    }
    @media (max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-welcome{display:none}
      .topbar-inner{justify-content:center}
      .topbar-contact{width:100%;justify-content:space-between;gap:10px}
      .topbar-contact a{font-size:12px}
      .logo span{font-size:17px}
      .account-entry{display:none}
      .open-account{padding:8px 13px}
      .download-page-main .download-intro{padding:56px 0}
      .download-page-main .intro-content>p{font-size:15px}
      .download-page-main .download-section,
      .download-page-main .steps-wrap,
      .download-page-main .requirements{padding:52px 0}
      .download-page-main .platform-grid,
      .download-page-main .steps-grid{grid-template-columns:1fr}
      .download-page-main .platform-card p{min-height:0}
      .download-page-main .requirements-panel{padding:25px;grid-template-columns:1fr}
      .download-page-main .require-list{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .footer-brand,.footer-grid>div:last-child{grid-column:1/-1}
      .footer-bottom{align-items:flex-start;flex-direction:column}
    }
    @media (max-width:480px){
      .topbar-contact a:first-child{display:none}
      .topbar-contact{justify-content:center}
      .header-inner{gap:10px}
      .logo img{width:36px;height:36px}
      .open-account{display:none}
      .download-page-main .intro-actions{flex-direction:column}
      .download-page-main .primary-action,
      .download-page-main .secondary-action{width:100%}
      .download-page-main .platform-card{padding:22px}
      .footer-grid{grid-template-columns:1fr}
      .footer-brand,.footer-grid>div:last-child{grid-column:auto}
    }