:root{
      --theme:#0B3D91;
      --ink:#101318;
      --muted:#687180;
      --line:#dfe4eb;
      --paper:#f6f8fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(16,19,24,.08);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#101318;color:#dbe3ef;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-info{display:flex;gap:22px}
    .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;min-width:190px;font-size:18px;font-weight:800;letter-spacing:.02em}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;justify-content:center;align-items:stretch;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:27px 13px;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{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);box-shadow:var(--shadow);border-radius:0 0 12px 12px;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
    .mega-menu{width:620px}
    .nav-item:hover>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.dropdown-panel,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible;pointer-events:auto}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-panel>a{display:block;padding:9px 4px;border-bottom:1px solid #eef1f5;font-size:14px}
    .mega-heading{margin:0 0 13px;font-size:16px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}
    .mega-card{display:block;padding:12px;border:1px solid var(--line);border-radius:8px;background:#fbfcfe}
    .mega-card:hover{border-color:var(--theme);background:#f1f6ff}
    .mega-card strong,.mega-card small{display:block}
    .mega-card strong{font-size:14px;margin-bottom:4px}
    .mega-card small{color:var(--muted);font-size:12px;line-height:1.45}
    .mega-card img{width:24px;height:24px;object-fit:contain;margin-bottom:5px}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:13px}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-link,.open-link{font-size:13px}
    .open-link{padding:9px 14px;border:1px solid var(--theme);color:var(--theme);border-radius:4px}
    .member-link:hover,.open-link:hover{background:var(--theme);color:#fff}
    .hamburger{display:none;width:40px;height:38px;padding:8px;border:1px solid var(--line);background:#fff;border-radius:4px;cursor:pointer}
    .hamburger span{display:block;height:2px;background:var(--ink);margin:4px 0;transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:40;opacity:0;visibility:hidden;transition:.2s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;z-index:41;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.25s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head a{color:var(--theme)}
    .drawer-close{border:0;background:none;font-size:28px;cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;text-align:left;border:0;border-bottom:1px solid #edf0f4;background:none;font:inherit;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--muted)}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{background:#101318;color:#dbe3ef;padding:56px 0 22px;margin-top:70px}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:36px}
    .footer-brand{font-size:20px;color:#fff;font-weight:800;margin-bottom:12px}
    .footer p{margin:6px 0;color:#aeb8c6;font-size:13px}
    .footer h3{margin:0 0 12px;color:#fff;font-size:15px}
    .footer-grid>div>a{display:block;color:#aeb8c6;font-size:13px;padding:3px 0}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:17px;border-top:1px solid #303740;color:#8f9aaa;font-size:12px}
    .about-page{min-height:500px}
    .about-hero{padding:86px 0 74px;background:#fff;border-bottom:1px solid var(--line)}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--theme);font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}
    .eyebrow:before{content:"";width:30px;height:2px;background:var(--theme)}
    .about-hero h1{max-width:850px;margin:20px 0 18px;font-size:clamp(38px,6vw,76px);line-height:1.05;letter-spacing:-.055em}
    .about-hero h1 em{font-style:normal;color:var(--theme)}
    .about-hero p{max-width:690px;margin:0;color:var(--muted);font-size:18px}
    .about-body{padding:70px 0}
    .about-intro{display:grid;grid-template-columns:1fr 1.45fr;gap:70px;align-items:start}
    .section-label{margin:0;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.12em}
    .about-intro h2{margin:14px 0 0;font-size:34px;line-height:1.2}
    .about-copy p{margin:0 0 18px;color:#4f5968}
    .about-copy strong{color:var(--ink)}
    .value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:58px}
    .value-card{min-height:210px;padding:26px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 25px rgba(16,19,24,.04)}
    .value-no{color:var(--theme);font-size:12px;font-weight:800;letter-spacing:.14em}
    .value-card h3{margin:26px 0 10px;font-size:19px}
    .value-card p{margin:0;color:var(--muted);font-size:14px}
    .about-trust{margin-top:70px;padding:38px;background:#101318;color:#fff;border-radius:14px;display:flex;justify-content:space-between;align-items:center;gap:30px}
    .about-trust h2{margin:0;font-size:26px}
    .about-trust p{max-width:580px;margin:8px 0 0;color:#b9c3d0;font-size:14px}
    .about-trust a{flex:none;padding:12px 20px;background:#fff;color:var(--theme);border-radius:4px;font-size:14px;font-weight:700}
    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{justify-content:space-between}
      .header-btns{margin-left:auto}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
      .about-intro{grid-template-columns:1fr;gap:25px}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:7px 0;align-items:flex-start}
      .topbar-info{gap:8px;flex-direction:column;text-align:right}
      .logo{min-width:0;font-size:16px}
      .member-link{display:none}
      .open-link{padding:7px 10px}
      .about-hero{padding:58px 0 50px}
      .about-hero h1{font-size:44px}
      .about-hero p{font-size:16px}
      .about-body{padding:48px 0}
      .value-grid{grid-template-columns:1fr;margin-top:40px}
      .about-trust{display:block;padding:26px}
      .about-trust a{display:inline-block;margin-top:20px}
      .footer-grid{grid-template-columns:1fr;gap:26px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:5px}
    }