:root{
    --c4c-blue:#174d8d;--c4c-navy:#10395e;--c4c-orange:#f47b20;
    --c4c-bg:#f4f7fa;--c4c-line:#dfe7ee;--c4c-text:#31465a;--c4c-muted:#82909d;
}
*{box-sizing:border-box}
.c4c-shell{width:1220px;max-width:calc(100% - 32px);margin:0 auto}
.c4c-topbar{height:34px;background:#f7f9fb;border-bottom:1px solid var(--c4c-line);color:#6f7d8b;font:800 8px Arial,sans-serif;letter-spacing:.45px}
.c4c-topbar-inner{height:100%;display:flex;align-items:center;justify-content:space-between}
.c4c-topbar-inner span{color:var(--c4c-orange);margin:0 4px}
.c4c-topbar-social{display:flex;gap:15px}.c4c-topbar-social a{color:#26394b;font-size:12px}
.c4c-header{background:#fff;border-bottom:1px solid var(--c4c-line);position:relative;z-index:1000}
.c4c-header-inner{height:84px;display:flex;align-items:center;gap:30px}
.c4c-logo,.c4c-footer-logo{display:flex;align-items:center;gap:9px;text-decoration:none}
.c4c-logo{min-width:285px}
.c4c-logo-mark{position:relative;width:54px;height:43px;display:block;flex:none}
.c4c-logo-mark i,.c4c-logo-mark b{position:absolute;width:40px;height:31px;border:8px solid;border-radius:22px;display:block}
.c4c-logo-mark i{left:0;top:0;border-color:var(--c4c-blue);border-right-color:transparent}
.c4c-logo-mark b{left:14px;top:8px;border-color:var(--c4c-orange);border-left-color:transparent}
.c4c-logo-copy strong{display:block;color:#294966;font:900 18px/18px Arial,sans-serif;letter-spacing:-.3px}
.c4c-logo-copy small{display:block;color:#294966;font:900 8px/10px Arial,sans-serif;letter-spacing:.25px}
.c4c-logo-copy small span{color:var(--c4c-orange)}
.c4c-nav{height:100%;display:flex;align-items:center;gap:28px;flex:1}
.c4c-nav a{height:100%;display:flex;align-items:center;position:relative;color:#293b4d;text-decoration:none;font:900 10px Arial,sans-serif}
.c4c-nav a.active,.c4c-nav a:hover{color:var(--c4c-blue)}
.c4c-nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:20px;height:2px;background:var(--c4c-orange)}
.c4c-member{display:flex;align-items:center;gap:10px}
.c4c-member-copy{text-align:right}.c4c-member-copy strong{display:block;color:var(--c4c-blue);font:900 9px Arial}.c4c-member-copy small{display:block;color:#8b98a4;font:700 7px Arial;margin-top:3px}
.c4c-avatar{width:40px;height:40px;border-radius:50%;background:var(--c4c-blue);color:#fff;display:flex;align-items:center;justify-content:center;font:900 11px Arial}
.c4c-logout,.c4c-login{color:var(--c4c-orange);font:900 8px Arial;text-decoration:none}
.c4c-join{background:var(--c4c-orange);color:#fff;padding:11px 15px;border-radius:4px;text-decoration:none;font:900 8px Arial}
.c4c-menu-toggle{display:none;border:1px solid var(--c4c-line);background:#fff;color:var(--c4c-blue);font-size:20px;padding:7px;border-radius:4px}
.c4c-mobile-nav{display:none}
.c4c-sidebar{width:218px;background:#fff;border:1px solid var(--c4c-line);border-radius:6px;overflow:hidden;flex:none;height:max-content}
.c4c-sidebar-title{height:58px;background:var(--c4c-blue);color:#fff;padding:0 15px;display:flex;align-items:center;justify-content:space-between;font:900 10px Arial;letter-spacing:.5px}
.c4c-sidebar-title button{display:none}
.c4c-sidebar-group{padding:13px 0 4px}.c4c-sidebar-label{padding:0 14px 8px;color:#9aa6b1;font:900 7px Arial;letter-spacing:1px}
.c4c-side-link{min-height:38px;padding:0 13px 0 14px;display:flex;align-items:center;justify-content:space-between;border-top:1px solid #edf1f4;color:#536475;text-decoration:none;font:700 8px Arial;position:relative}
.c4c-side-link:hover{background:#f5f8fb;color:var(--c4c-blue)}.c4c-side-link.active{background:#edf5fb;color:var(--c4c-blue);font-weight:900;padding-left:11px}.c4c-side-link.active:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c4c-orange)}.c4c-side-link b{font-size:14px;color:#9aa7b2}
.c4c-sidebar-overlay{display:none}
.c4c-footer{margin-top:45px;background:var(--c4c-blue);color:#fff;position:relative;overflow:hidden}
.c4c-footer:after{content:"C4C";position:absolute;right:-20px;bottom:-75px;color:rgba(255,255,255,.035);font:900 250px Arial;pointer-events:none}
.c4c-footer-grid{display:grid;grid-template-columns:1.65fr repeat(4,1fr);gap:45px;padding:55px 0 48px;position:relative;z-index:1}
.c4c-footer-logo .c4c-logo-copy strong,.c4c-footer-logo .c4c-logo-copy small{color:#fff}
.c4c-footer-brand p{max-width:330px;color:#d5e0ea;font:400 10px/1.8 Arial;margin:18px 0}
.c4c-footer-grid h3{color:#fff;font:900 10px Arial;letter-spacing:.7px;margin:5px 0 18px}.c4c-footer-grid h3:after{content:"";display:block;width:36px;height:2px;background:var(--c4c-orange);margin-top:9px}
.c4c-footer-grid>div>a{display:block;color:#d4e0ea;text-decoration:none;font:400 9px/2.15 Arial}.c4c-footer-grid>div>a:hover{color:#fff}
.c4c-social-row{display:flex;gap:9px}.c4c-social-row a{width:34px;height:34px;border:1px solid rgba(255,255,255,.55);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;text-decoration:none;font:900 11px Arial}
.c4c-footer-bottom{border-top:1px solid rgba(255,255,255,.22);padding:20px 0 28px;display:flex;justify-content:space-between;gap:20px;color:#d3dee8;font:400 8px/2 Arial;position:relative;z-index:1}.c4c-footer-bottom a{color:#fff;text-decoration:none}.c4c-footer-bottom span,.c4c-footer-trust i{color:var(--c4c-orange);font-style:normal}.c4c-footer-trust{font-size:10px}
.c4c-chat{position:fixed;right:24px;bottom:22px;z-index:1500;background:#fff;color:#294966;border-radius:28px;box-shadow:0 5px 20px rgba(15,50,80,.18);padding:0 8px 0 20px;height:48px;display:flex;align-items:center;gap:15px;text-decoration:none;font:900 9px Arial;letter-spacing:.5px}.c4c-chat b{width:44px;height:44px;background:#25d366;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px}
@media(max-width:1000px){.c4c-logo{min-width:220px}.c4c-nav{gap:15px}.c4c-member-copy{display:none}}
@media(max-width:800px){.c4c-topbar{display:none}.c4c-header-inner{height:68px}.c4c-nav{display:none}.c4c-member{margin-left:auto}.c4c-menu-toggle{display:block}.c4c-mobile-nav{background:#fff;border-top:1px solid var(--c4c-line);padding:8px 16px}.c4c-mobile-nav.open{display:block}.c4c-mobile-nav a{display:block;padding:12px 5px;border-bottom:1px solid #edf1f4;color:var(--c4c-text);font:900 9px Arial;text-decoration:none}.c4c-sidebar{position:fixed;left:-290px;top:0;bottom:0;width:270px;z-index:2000;height:100vh;overflow:auto;border-radius:0;transition:left .2s}.c4c-sidebar.open{left:0}.c4c-sidebar-title button{display:block;background:none;border:0;color:#fff;font-size:24px}.c4c-sidebar-overlay.open{display:block;position:fixed;inset:0;background:rgba(10,30,50,.4);z-index:1999}}
@media(max-width:600px){.c4c-shell{max-width:calc(100% - 22px)}.c4c-logo{min-width:0}.c4c-logo-mark{transform:scale(.82);transform-origin:left center;margin-right:-7px}.c4c-logo-copy strong{font-size:14px}.c4c-logo-copy small{font-size:6px}.c4c-logout,.c4c-login,.c4c-join{display:none}.c4c-footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px;padding:35px 0}.c4c-footer-brand{grid-column:1/-1}.c4c-footer-bottom{display:block}.c4c-footer-trust{margin-top:10px}.c4c-chat{right:12px;bottom:12px;height:42px;padding-left:14px;font-size:8px}.c4c-chat b{width:38px;height:38px}}