:root{
      --blue:#0B3D91;
      --ink:#172235;
      --muted:#657084;
      --line:#dfe5ee;
      --paper:#f7f4ec;
      --white:#fff;
      --shadow:0 16px 40px rgba(22,42,75,.10);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f6f8fb;font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{background:#10284f;color:#dbe7f8;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar a{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:30px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:20px;font-weight:800;color:var(--blue)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:4px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:76px;padding:0 13px;font-size:15px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--blue)}
    .has-arrow:after{content:"⌄";font-size:14px;margin-left:6px;color:#8290a4}
    .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 12px 12px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:620px}
    .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}
    .menu-title{margin:0 0 12px;color:var(--blue);font-size:14px;font-weight:800}
    .menu-list{display:grid;gap:8px}
    .menu-list a{display:block;padding:4px 0;font-size:14px}
    .menu-list a:hover,.mega-card:hover{color:var(--blue)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;min-height:76px;padding:10px;border:1px solid #e6ebf2;border-radius:8px;background:#fbfcfe;font-size:13px}
    .mega-card img{width:30px;height:30px;object-fit:contain;margin-bottom:5px}
    .mega-card small{color:var(--muted);font-size:11px}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);color:var(--blue);font-weight:700;font-size:13px}
    .header-btns{display:flex;align-items:center;gap:9px}
    .member,.open-account{padding:8px 13px;border-radius:5px;font-size:13px;font-weight:700}
    .member{color:var(--blue);border:1px solid #b8c8e2}
    .open-account{color:#fff;background:var(--blue)}
    .hamburger{display:none;width:42px;height:38px;padding:8px;border:1px solid var(--line);background:#fff;border-radius:5px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--blue);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(9,21,40,.45);opacity:0;visibility:hidden;transition:.25s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(100%);transition:.25s;z-index:41;box-shadow:-10px 0 30px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--line);font-weight:800}
    .drawer-head span{margin-right:auto}
    .drawer-head a{padding:5px 10px;color:#fff;background:var(--blue);border-radius:4px;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer;color:var(--ink)}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf0f4;background:none;text-align:left;font:inherit;color:var(--ink);cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--blue)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 8px 15px;background:#f7f9fc}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}

    .about-page{padding-bottom:70px}
    .about-hero{padding:78px 0 68px;background:linear-gradient(135deg,#eef4fc 0%,#fff 58%,#f8f1e5 100%);border-bottom:1px solid #e2e8f0}
    .about-hero .eyebrow{display:inline-flex;padding:5px 12px;border:1px solid #b7c9e5;border-radius:20px;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.08em}
    .about-hero h1{max-width:780px;margin:18px 0 12px;font-size:clamp(34px,5vw,64px);line-height:1.16;letter-spacing:-.04em}
    .about-hero p{max-width:700px;margin:0;color:var(--muted);font-size:18px}
    .about-section{padding:70px 0}
    .section-heading{max-width:720px;margin-bottom:30px}
    .section-heading h2{margin:0 0 10px;font-size:32px;line-height:1.3}
    .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 p{margin:0 0 16px;color:#49566b}
    .trust-note{padding:28px;background:var(--paper);border-left:5px solid var(--blue);box-shadow:var(--shadow)}
    .trust-note strong{display:block;margin-bottom:8px;font-size:21px}
    .trust-note span{color:var(--muted);font-size:14px}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card{padding:24px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 24px rgba(28,48,79,.05)}
    .service-card b{display:block;margin-bottom:9px;font-size:18px;color:var(--blue)}
    .service-card p{margin:0;color:var(--muted);font-size:14px}
    .timeline{position:relative;display:grid;gap:18px}
    .timeline:before{content:"";position:absolute;left:20px;top:10px;bottom:10px;width:2px;background:#cbd8eb}
    .timeline-item{position:relative;display:grid;grid-template-columns:42px 110px 1fr;gap:18px;align-items:start}
    .timeline-dot{width:12px;height:12px;margin:8px 0 0 15px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 5px #e3ebf8}
    .timeline-year{font-weight:800;color:var(--blue)}
    .timeline-item p{margin:0;color:var(--muted)}
    .responsibility{padding:34px;background:#10284f;color:#fff;border-radius:12px}
    .responsibility h2{margin:0 0 10px;font-size:28px}
    .responsibility p{max-width:820px;margin:0;color:#d7e2f2}
    .responsibility a{display:inline-block;margin-top:22px;padding:10px 18px;border-radius:5px;background:#fff;color:var(--blue);font-weight:800}

    .footer{padding:52px 0 20px;background:#102033;color:#dbe5f2}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:17px}
    .footer p{margin:0 0 10px;color:#aebdd0;font-size:13px}
    .footer-grid>div>a{display:block;margin:6px 0;color:#b9c7d8;font-size:13px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.15);color:#9eafc3;font-size:12px}

    @media (max-width:900px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns .member,.header-btns .open-account{display:none}
      .about-intro{grid-template-columns:1fr}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:600px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:0}
      .header-inner{min-height:66px}
      .about-hero{padding:54px 0}
      .about-hero p{font-size:16px}
      .about-section{padding:48px 0}
      .section-heading h2{font-size:27px}
      .service-grid,.footer-grid{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:32px 78px 1fr;gap:10px;font-size:14px}
      .timeline-dot{margin-left:10px}
    }