:root{--theme:#0B3D91;--ink:#14213d;--muted:#62708a;--line:#dbe3ee;--paper:#f5f8fc;--white:#fff;--accent:#f3b544}
    *{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:1.6}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#10213f;color:#dce7f7;font-size:13px}
    .topbar .container{min-height:34px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar a{margin-left:22px;color:#dce7f7}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:32px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-weight:800;color:var(--theme);font-size:19px}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:27px 14px;font-size:15px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";display:inline-block;width:6px;height:6px;margin:0 0 3px 8px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);width:280px;padding:14px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 40px rgba(18,43,80,.14);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:650px}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .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 a{display:block;padding:9px 10px;border-bottom:1px solid #edf1f6;font-size:14px}
    .dropdown-panel a:last-child{color:var(--theme);font-weight:700}
    .mega-title{padding:4px 4px 10px;color:var(--theme);font-size:13px;font-weight:800}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:12px}
    .mega-card{min-width:0;padding:10px;border:1px solid #e4eaf2;background:#fbfcfe}
    .mega-card img{width:30px;height:30px;object-fit:contain;margin-bottom:7px}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis}
    .mega-card strong{font-size:13px;white-space:nowrap}
    .mega-card small{margin-top:3px;color:var(--muted);font-size:11px;line-height:1.45}
    .mega-footer{display:block;padding-top:9px;color:var(--theme);font-size:13px;font-weight:700;border-top:1px solid var(--line)}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-btn,.open-btn{padding:9px 14px;font-size:13px;font-weight:700;border:1px solid var(--theme)}
    .member-btn{color:var(--theme)}
    .open-btn{background:var(--theme);color:#fff}
    .hamburger{display:none;width:42px;height:42px;padding:10px;border:1px solid var(--line);background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:5px 0;background:var(--ink);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{position:fixed;inset:0;background:rgba(7,18,38,.45);opacity:0;visibility:hidden;transition:.2s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(380px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(100%);transition:.25s;z-index:41}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:18px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;color:var(--theme)}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf1f6;background:none;text-align:left;color:var(--ink);font:inherit;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 16px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:9px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:80px;background:#0d1b34;color:#c8d5e8}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:42px;padding:52px 0 38px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-brand strong{display:block;margin-bottom:12px;color:#fff;font-size:19px}
    .footer p{margin:7px 0;font-size:13px}
    .footer-grid>div>a{display:block;margin:8px 0;color:#c8d5e8;font-size:13px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{padding:18px 0;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:#9eafc8}
    .about-page{padding-bottom:2px}
    .about-hero{padding:78px 0 66px;background:linear-gradient(135deg,#edf4fc 0%,#fff 58%,#f9f1de 100%);border-bottom:1px solid var(--line)}
    .about-hero .eyebrow{margin:0 0 12px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:2px}
    .about-hero h1{max-width:780px;margin:0;font-size:clamp(34px,5vw,64px);line-height:1.12;letter-spacing:0}
    .about-hero p{max-width:690px;margin:22px 0 0;color:var(--muted);font-size:18px}
    .about-hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
    .primary-action,.secondary-action{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border:1px solid var(--theme);font-weight:700}
    .primary-action{background:var(--theme);color:#fff}
    .secondary-action{color:var(--theme);background:#fff}
    .about-section{padding:76px 0 0}
    .section-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}
    .section-heading h2{margin:0;font-size:30px;line-height:1.2}
    .section-heading p{max-width:530px;margin:0;color:var(--muted)}
    .principles{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .principle{padding:26px;background:#fff;border:1px solid var(--line)}
    .principle-index{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;background:#e9f0fb;color:var(--theme);font-weight:800}
    .principle h3{margin:20px 0 9px;font-size:19px}
    .principle p{margin:0;color:var(--muted);font-size:14px}
    .about-band{margin-top:76px;padding:42px;background:var(--theme);color:#fff;display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center}
    .about-band h2{margin:0;font-size:30px;line-height:1.25}
    .about-band p{margin:12px 0 0;color:#d8e5f8}
    .service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .service-list div{padding:16px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);font-size:14px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:2px solid #bdcde2}
    .timeline-item{position:relative;padding:25px 18px 0 0}
    .timeline-item:before{content:"";position:absolute;top:-8px;left:0;width:14px;height:14px;background:var(--accent);border:3px solid var(--paper);border-radius:50%}
    .timeline-item strong{display:block;margin-bottom:8px;color:var(--theme);font-size:18px}
    .timeline-item p{margin:0;color:var(--muted);font-size:14px}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,560px)}
      .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar a{margin:0 14px 0 0}
      .header-inner{height:68px;gap:10px}
      .member-btn{display:none}
      .open-btn{padding:8px 10px;font-size:12px}
      .about-hero{padding:52px 0 48px}
      .about-hero p{font-size:16px}
      .section-heading{display:block}
      .section-heading p{margin-top:12px}
      .principles,.service-list{grid-template-columns:1fr}
      .about-band{grid-template-columns:1fr;padding:28px 22px}
      .timeline{grid-template-columns:1fr;border-top:0;border-left:2px solid #bdcde2;padding-left:20px}
      .timeline-item{padding:0 0 28px}
      .timeline-item:before{top:0;left:-29px}
      .footer-grid{grid-template-columns:1fr;gap:25px;padding:38px 0 28px}
      .footer{margin-top:54px}
    }