:root{
      --theme:#0B3D91;
      --ink:#14213d;
      --muted:#65728a;
      --line:#e4eaf3;
      --paper:#f6f8fc;
      --white:#fff;
      --shadow:0 18px 50px rgba(20,45,88,.11);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);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% - 36px));margin:0 auto}
    .topbar{background:#0f1f3d;color:#dfe8f8;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:22px}
    .topbar a{color:#dfe8f8}
    .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;flex:0 0 auto;color:var(--theme);font-size:19px;font-weight:800;white-space:nowrap}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:4px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:76px;padding:0 13px;color:#253552;font-size:14px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:14px;margin-left:6px;color:#8290a6}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%) translateY(8px);width:300px;padding:20px;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: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;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .panel-title{margin:0 0 13px;color:var(--theme);font-size:14px;font-weight:800}
    .panel-list{display:grid;gap:8px}
    .panel-list a{display:block;padding:8px 10px;border-radius:8px;color:#485772;font-size:13px}
    .panel-list a:hover{background:#edf3fc;color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fbfcff}
    .mega-card:hover{border-color:#aebfdf;background:#f3f7fd}
    .mega-card img{width:38px;height:38px;object-fit:contain;border-radius:7px;background:#eef3fb;flex:0 0 auto}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:13px}
    .mega-card small{color:var(--muted);font-size:11px}
    .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:9px;flex:0 0 auto}
    .member-link,.open-link{padding:8px 13px;border-radius:8px;font-size:13px;font-weight:700}
    .member-link{color:var(--theme);border:1px solid #b9c9e5}
    .open-link{color:#fff;background:var(--theme)}
    .hamburger{display:none;width:42px;height:40px;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
    .hamburger span{display:block;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(8,20,42,.5);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(390px,88vw);padding:20px;background:#fff;z-index:50;overflow:auto;transform:translateX(100%);transition:.25s;box-shadow:-10px 0 35px rgba(0,0,0,.16)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:10px;padding-bottom:18px;border-bottom:1px solid var(--line);font-weight:800;color:var(--theme)}
    .drawer-head span{margin-right:auto}
    .drawer-head a{padding:6px 12px;border-radius:7px;background:var(--theme);color:#fff;font-size:13px}
    .drawer-close{width:32px;height:32px;border:0;background:#eef3fa;color:var(--theme);border-radius:50%;font-size:23px;line-height:1;cursor:pointer}
    .drawer-menu{padding-top:10px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 2px;border:0;border-bottom:1px solid #edf0f5;background:none;color:var(--ink);text-align:left;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#8290a6}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 7px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;padding:48px 0 20px;background:#111e38;color:#d8e2f2}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:34px}
    .footer-brand{margin-bottom:12px;color:#fff;font-size:20px;font-weight:800}
    .footer p{margin:7px 0;color:#aebbd0;font-size:13px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:8px}
    .footer-links a,.footer-links span{color:#aebbd0;font-size:13px}
    .footer-links a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);color:#91a1bb;font-size:12px}
    .about-page{min-height:500px}
    .about-hero{padding:74px 0 58px;background:linear-gradient(135deg,#edf4ff 0%,#fff 58%,#e8effb 100%);border-bottom:1px solid #dce6f4}
    .about-kicker{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.12em}
    .about-kicker:before{content:"";width:28px;height:3px;border-radius:3px;background:var(--theme)}
    .about-hero h1{max-width:800px;margin:0;color:#142b54;font-size:clamp(34px,5vw,62px);line-height:1.18;letter-spacing:-.04em}
    .about-hero p{max-width:720px;margin:22px 0 0;color:#5d6d86;font-size:17px}
    .about-wrap{padding:58px 0}
    .section-heading{margin-bottom:28px}
    .section-heading h2{margin:0 0 8px;color:#172d52;font-size:30px}
    .section-heading p{margin:0;color:var(--muted)}
    .about-intro{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:stretch}
    .about-panel,.value-card,.timeline-item,.trust-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 28px rgba(30,60,110,.05)}
    .about-panel{padding:30px}
    .about-panel h3{margin:0 0 14px;color:var(--theme);font-size:21px}
    .about-panel p{margin:10px 0;color:#5c6b82}
    .stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .stat{padding:24px;border-radius:14px;background:#f1f5fc;border:1px solid #e0e8f5}
    .stat strong{display:block;color:var(--theme);font-size:30px;line-height:1.2}
    .stat span{display:block;margin-top:6px;color:var(--muted);font-size:13px}
    .values{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}
    .value-card{padding:25px}
    .value-icon{display:grid;place-items:center;width:42px;height:42px;margin-bottom:16px;border-radius:12px;background:#e9f0fc;color:var(--theme);font-weight:900}
    .value-card h3{margin:0 0 8px;font-size:18px}
    .value-card p{margin:0;color:var(--muted);font-size:14px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:42px}
    .timeline-item{position:relative;padding:22px}
    .timeline-item b{display:block;margin-bottom:9px;color:var(--theme);font-size:22px}
    .timeline-item h3{margin:0 0 8px;font-size:17px}
    .timeline-item p{margin:0;color:var(--muted);font-size:13px}
    .trust{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}
    .trust-card{padding:23px}
    .trust-card h3{margin:0 0 8px;font-size:17px}
    .trust-card p{margin:0;color:var(--muted);font-size:13px}
    .about-cta{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:44px;padding:28px 32px;border-radius:18px;background:var(--theme);color:#fff}
    .about-cta h2{margin:0;font-size:24px}
    .about-cta p{margin:5px 0 0;color:#dce8ff;font-size:14px}
    .about-cta a{padding:11px 18px;border-radius:8px;background:#fff;color:var(--theme);font-weight:800;white-space:nowrap}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .about-intro{grid-template-columns:1fr}
    }
    @media(max-width:720px){
      .container{width:min(100% - 28px,600px)}
      .topbar .container{align-items:flex-start;flex-direction:column;padding:8px 0;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .member-link{display:none}
      .header-inner{min-height:66px;gap:10px}
      .logo span{font-size:16px}
      .open-link{padding:7px 10px}
      .about-hero{padding:52px 0 42px}
      .about-hero h1{font-size:38px}
      .about-hero p{font-size:15px}
      .about-wrap{padding:40px 0}
      .stats,.values,.timeline,.trust{grid-template-columns:1fr}
      .about-panel{padding:23px}
      .about-cta{align-items:flex-start;flex-direction:column;padding:23px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-bottom{align-items:flex-start;flex-direction:column;gap:6px}
    }
    @media(max-width:440px){
      .footer-grid{grid-template-columns:1fr}
      .topbar-links{font-size:12px}
      .about-hero h1{font-size:32px}
    }