:root{
      --theme:#0B3D91;
      --theme-dark:#08285e;
      --ink:#172235;
      --muted:#65728a;
      --line:#dfe6f0;
      --surface:#fff;
      --soft:#f4f7fb;
      --accent:#a8e63d;
      --shadow:0 18px 50px rgba(17,46,91,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","微软雅黑",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:#071b3d;color:#cbd8ee;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar strong{color:#fff}
    .topbar a{margin-left:22px;color:#dce8fa;transition:color .2s}
    .topbar a:hover{color:var(--accent)}

    .header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--theme);font-weight:800;font-size:18px}
    .logo img{width:38px;height:38px;object-fit:contain;border-radius:10px}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:26px 13px;font-size:14px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{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:100%;left:50%;transform:translateX(-50%) translateY(8px);width:250px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:60}
    .mega-menu{width:650px;padding:24px}
    .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)}
    .dropdown-panel a,.mega-links a{display:block;padding:8px 10px;border-radius:8px;font-size:13px}
    .dropdown-panel a:hover,.mega-links a:hover{background:var(--soft);color:var(--theme)}
    .mega-title{margin:0 0 12px;color:var(--theme);font-size:13px;font-weight:800}
    .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 var(--line);border-radius:11px;background:#fbfcfe}
    .mega-card:hover{border-color:#9eb8e1;background:#f1f6fd}
    .mega-card img{width:34px;height:34px;object-fit:contain;border-radius:7px;flex:0 0 34px}
    .mega-card span{min-width:0;font-size:11px;color:var(--muted);line-height:1.45}
    .mega-card b{display:block;color:var(--ink);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .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:14px;white-space:nowrap;font-size:13px}
    .header-btns>a:first-child{color:var(--theme);font-weight:700}
    .account-btn{padding:10px 16px;border-radius:9px;background:var(--theme);color:#fff!important;font-weight:700}
    .account-btn:hover{background:var(--theme-dark)}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;margin:5px 0;background:var(--theme);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{display:none;position:fixed;inset:0;background:rgba(2,14,35,.52);z-index:70}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(380px,88vw);padding:22px;background:#fff;z-index:80;overflow:auto;transform:translateX(100%);transition:transform .25s;box-shadow:-15px 0 40px rgba(0,0,0,.15)}
    .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;color:var(--theme)}
    .drawer-head span{flex:1}
    .drawer-head a{padding:7px 13px;border-radius:7px;background:var(--theme);color:#fff;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;color:var(--muted);cursor:pointer}
    .drawer-menu{padding-top:12px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 4px;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}

    .about-page{padding-bottom:80px}
    .about-hero{position:relative;overflow:hidden;padding:92px 0 88px;background:linear-gradient(130deg,#071b3d 0%,#0B3D91 57%,#1f6bc1 100%);color:#fff}
    .about-hero:after{content:"";position:absolute;width:420px;height:420px;right:-120px;top:-180px;border:1px solid rgba(255,255,255,.18);border-radius:50%;box-shadow:0 0 0 38px rgba(255,255,255,.04),0 0 0 78px rgba(255,255,255,.035)}
    .about-hero .container{position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--accent);font-size:13px;font-weight:800;letter-spacing:.12em}
    .eyebrow:before{content:"";width:28px;height:2px;background:var(--accent)}
    .about-hero h1{max-width:760px;margin:18px 0 18px;font-size:clamp(36px,5vw,64px);line-height:1.14;letter-spacing:-.04em}
    .about-hero p{max-width:650px;margin:0;color:#dce9ff;font-size:18px}
    .about-hero-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
    .about-hero-meta span{padding:8px 14px;border:1px solid rgba(255,255,255,.25);border-radius:99px;color:#f1f6ff;font-size:13px;background:rgba(255,255,255,.08)}
    .about-section{padding:82px 0}
    .section-heading{max-width:700px;margin-bottom:34px}
    .section-heading h2{margin:10px 0;font-size:34px;line-height:1.25}
    .section-heading p{margin:0;color:var(--muted)}
    .about-intro{display:grid;grid-template-columns:1.1fr .9fr;gap:42px;align-items:start}
    .about-intro-copy p{margin:0 0 18px;color:#536177;font-size:16px}
    .fact-panel{padding:28px;border-radius:var(--radius);background:#fff;box-shadow:var(--shadow);border:1px solid var(--line)}
    .fact-panel h3{margin:0 0 20px;font-size:18px}
    .fact-row{display:flex;justify-content:space-between;gap:20px;padding:14px 0;border-bottom:1px solid var(--line);font-size:14px}
    .fact-row:last-child{border-bottom:0}
    .fact-row strong{color:var(--theme)}
    .value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .value-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(17,46,91,.05)}
    .value-icon{display:grid;place-items:center;width:44px;height:44px;margin-bottom:20px;border-radius:12px;background:#eaf1fc;color:var(--theme);font-size:20px;font-weight:800}
    .value-card h3{margin:0 0 8px;font-size:18px}
    .value-card p{margin:0;color:var(--muted);font-size:14px}
    .trust-band{padding:54px 0;background:#eef4fc}
    .trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .trust-item strong{display:block;color:var(--theme);font-size:31px;line-height:1.2}
    .trust-item span{display:block;margin-top:7px;color:var(--muted);font-size:13px}
    .about-cta{padding:50px 46px;border-radius:24px;background:linear-gradient(110deg,#0B3D91,#09295e);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:30px}
    .about-cta h2{margin:0 0 8px;font-size:28px}
    .about-cta p{margin:0;color:#cbdafa}
    .cta-link{display:inline-block;flex:0 0 auto;padding:13px 20px;border-radius:9px;background:var(--accent);color:#142900;font-weight:800}
    .cta-link:hover{background:#c3f36a}

    .footer{padding:58px 0 20px;background:#071b3d;color:#bfcee5}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:38px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:20px}
    .footer h4{margin:0 0 13px;color:#fff;font-size:14px}
    .footer p{margin:7px 0;font-size:13px;line-height:1.7}
    .footer a{display:block;margin:7px 0;color:#bfcee5;font-size:13px}
    .footer a:hover{color:var(--accent)}
    .footer-brand p{max-width:280px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:20px;border-top:1px solid rgba(255,255,255,.13);font-size:12px;color:#8fa6c8}

    @media (max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .about-intro{grid-template-columns:1fr}
    }
    @media (max-width:720px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{min-height:58px;align-items:flex-start;justify-content:center;flex-direction:column;gap:0}
      .topbar a{margin:0 16px 0 0}
      .header-inner{min-height:66px;gap:10px}
      .logo{min-width:0;font-size:15px}
      .logo img{width:32px;height:32px}
      .header-btns{gap:8px;font-size:12px}
      .account-btn{padding:8px 10px}
      .about-hero{padding:62px 0 58px}
      .about-hero h1{font-size:40px}
      .about-hero p{font-size:16px}
      .about-section{padding:58px 0}
      .section-heading h2{font-size:28px}
      .value-grid,.trust-grid{grid-template-columns:1fr 1fr}
      .about-cta{padding:30px 24px;display:block}
      .about-cta h2{font-size:24px}
      .cta-link{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:8px}
    }
    @media (max-width:450px){
      .header-btns>a:first-child{display:none}
      .value-grid,.trust-grid,.footer-grid{grid-template-columns:1fr}
      .mega-menu{width:calc(100vw - 28px)}
    }