:root{--theme:#0B3D91;--ink:#142033;--muted:#687386;--line:#e5eaf1;--soft:#f5f8fc;--white:#fff}
    *{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:auto}
    .topbar{background:#091a35;color:#d9e5f5;font-size:13px}
    .topbar .container{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar a{margin-left:20px;color:#d9e5f5}
    .header{position:relative;background:#fff;border-bottom:1px solid var(--line);z-index:20}
    .header-inner{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:19px;font-weight:800;color:var(--theme)}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:block;padding:25px 13px;font-size:15px;color:#24324a;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";margin-left:6px;font-size:12px}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);width:300px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:0 0 12px 12px;box-shadow:0 18px 38px #1420331a;opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:650px}
    .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}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-panel>a:not(.mega-footer),.drawer-menu>a{display:block;padding:8px 4px;border-bottom:1px solid #eef1f5;font-size:14px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;min-height:110px;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fbfcfe}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:6px}
    .mega-card strong{display:block;font-size:13px;line-height:1.4}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.5;margin-top:4px}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:14px;white-space:nowrap}
    .account-link,.header-btns>a:not(.account-link){color:var(--theme);font-size:14px}
    .hamburger{display:none;width:40px;height:38px;padding:8px;border:1px solid var(--line);background:#fff;border-radius:6px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--theme);transition:.2s}
    .drawer-overlay{display:none;position:fixed;inset:0;background:#08152b99;z-index:50}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:-340px;width:min(340px,88vw);height:100vh;padding:20px;background:#fff;z-index:60;overflow:auto;transition:right .25s;box-shadow:-10px 0 30px #0002}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:14px;padding-bottom:18px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:700}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-size:14px}
    .drawer-close{border:0;background:none;color:#566176;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding-top:12px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:12px 4px;border:0;border-bottom:1px solid var(--line);background:#fff;text-align:left;color:var(--ink);cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 8px 16px;background:var(--soft)}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 4px;color:var(--muted);font-size:13px}
    .footer{margin-top:70px;padding:54px 0 20px;background:#0b1930;color:#b9c7d9}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:16px}
    .footer p{margin:0 0 10px;font-size:13px;line-height:1.9}
    .footer a{display:block;margin:7px 0;color:#b9c7d9;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-bottom{margin-top:36px;padding-top:18px;border-top:1px solid #ffffff1a;color:#8798af;font-size:12px}
    .download-page-main{background:linear-gradient(180deg,#f5f8fc 0,#fff 520px);padding-bottom:30px}
    .download-hero{padding:76px 0 58px;text-align:center}
    .download-kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:30px;background:#e8f0ff;color:var(--theme);font-size:13px;font-weight:700}
    .download-hero h1{margin:20px auto 12px;font-size:clamp(34px,5vw,58px);line-height:1.15;letter-spacing:-1px;color:#101d35}
    .download-hero p{max-width:680px;margin:0 auto;color:var(--muted);font-size:17px}
    .download-actions{display:flex;justify-content:center;gap:14px;margin-top:28px;flex-wrap:wrap}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-width:150px;padding:12px 24px;border-radius:7px;font-weight:700;font-size:14px}
    .primary-btn{background:var(--theme);color:#fff;box-shadow:0 10px 22px #0b3d9130}
    .secondary-btn{border:1px solid #cbd6e4;color:var(--theme);background:#fff}
    .download-wrap{width:min(1060px,calc(100% - 40px));margin:auto}
    .section-title{text-align:center;margin:8px 0 28px}
    .section-title h2{margin:0 0 8px;font-size:28px;color:#15233c}
    .section-title p{margin:0;color:var(--muted);font-size:14px}
    .download-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .step-card{position:relative;padding:28px 24px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 22px #1a3b6710}
    .step-no{display:inline-flex;width:36px;height:36px;align-items:center;justify-content:center;border-radius:50%;background:var(--theme);color:#fff;font-weight:800}
    .step-card h3{margin:18px 0 8px;font-size:18px}
    .step-card p{margin:0;color:var(--muted);font-size:14px}
    .feature-band{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:56px 0;padding:22px;background:#eef4ff;border-radius:14px}
    .feature-band div{padding:10px 16px;border-right:1px solid #d7e2f4}
    .feature-band div:last-child{border-right:0}
    .feature-band strong{display:block;color:var(--theme);font-size:16px}
    .feature-band span{display:block;color:var(--muted);font-size:12px;margin-top:4px}
    .faq-list{max-width:850px;margin:0 auto}
    .faq-item{padding:18px 0;border-bottom:1px solid var(--line)}
    .faq-item h3{margin:0 0 7px;font-size:16px}
    .faq-item p{margin:0;color:var(--muted);font-size:14px}
    @media(max-width:1050px){
      .main-nav{display:none}.hamburger{display:block}.header-inner{justify-content:space-between}.header-btns{margin-left:auto}
    }
    @media(max-width:700px){
      .container,.download-wrap{width:min(100% - 28px,1180px)}
      .topbar .container{height:auto;min-height:38px;padding:8px 0;align-items:flex-start;flex-direction:column}
      .topbar .contact{display:flex;flex-wrap:wrap}.topbar a{margin:2px 14px 0 0}
      .header-inner{height:68px}.logo{font-size:16px}.logo img{width:31px;height:31px}
      .account-link{display:none}.download-hero{padding:52px 0 42px}.download-hero p{font-size:15px}
      .download-steps{grid-template-columns:1fr}.feature-band{grid-template-columns:repeat(2,1fr);gap:6px;margin:40px 0}
      .feature-band div{border-right:0;border-bottom:1px solid #d7e2f4;padding:12px 10px}
      .feature-band div:nth-last-child(-n+2){border-bottom:0}
      .footer-grid{grid-template-columns:1fr 1fr;gap:26px 18px}.footer-grid>div:first-child{grid-column:1/-1}
      .mega-menu{display:none}
    }