:root{
      --primary:#0B3D91;
      --ink:#172033;
      --muted:#687386;
      --line:#e5e9f0;
      --soft:#f5f7fb;
      --white:#fff;
      --accent:#c2185b;
      --shadow:0 14px 38px rgba(20,37,70,.08);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,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:0 auto}
    .topbar{background:#14233e;color:#dce6f7;font-size:13px}
    .topbar .container{height:38px;display:flex;align-items:center;justify-content:space-between}
    .topbar-links{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{height:78px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
    .header-inner{height:100%;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-weight:800;color:var(--primary);font-size:19px}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:4px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{height:78px;display:flex;align-items:center;padding:0 14px;color:#27344b;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--primary)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 4px 8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg)}
    .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 14px 14px;box-shadow:0 18px 40px rgba(24,40,70,.14);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}
    .mega-menu{width:720px}
    .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;pointer-events:auto;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .drop-title,.mega-title{margin:0 0 12px;font-size:13px;font-weight:800;color:var(--primary)}
    .drop-list{display:grid;gap:8px}
    .drop-list a{font-size:13px;color:#47546a;padding:5px 0}
    .drop-list a:hover{color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
    .mega-items{display:grid;grid-template-columns:1fr 1fr;gap:9px}
    .mega-card{display:flex;gap:8px;min-width:0;padding:8px;border:1px solid #edf0f5;border-radius:10px}
    .mega-card:hover{border-color:#b8c9e6;background:#f8faff}
    .mega-card img{width:34px;height:34px;object-fit:cover;border-radius:7px;background:#eef2f8;flex:none}
    .mega-card span{display:block;min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:12px}
    .mega-card small{font-size:10px;color:var(--muted);margin-top:2px}
    .mega-footer{display:inline-flex;margin-top:14px;color:var(--primary);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:12px}
    .member-link{font-size:13px;color:var(--primary);font-weight:700}
    .open-account{padding:9px 16px;border-radius:8px;background:var(--primary);color:#fff;font-size:13px;font-weight:700}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:9px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--primary);transition:.2s}
    .hamburger.active span:first-child{transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;background:rgba(11,25,48,.48);opacity:0;visibility:hidden;z-index:50;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;z-index:51;transform:translateX(100%);transition:.28s ease;overflow:auto;box-shadow:-12px 0 35px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:15px;padding:22px 20px;border-bottom:1px solid var(--line);font-weight:800;color:var(--primary)}
    .drawer-head>a{margin-left:auto;padding:6px 11px;border-radius:7px;background:var(--primary);color:#fff;font-size:13px}
    .drawer-close{font-size:25px;line-height:1;border:0;background:transparent;color:#56627a;cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 0;border:0;border-bottom:1px solid #edf0f4;background:none;color:var(--ink);font:inherit;text-align:left;cursor:pointer}
    .drawer-toggle:after{content:"+";font-size:20px;color:var(--muted)}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 14px}
    .drawer-submenu.open{display:grid}
    .drawer-submenu a{padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:80px;padding:54px 0 22px;background:#101c32;color:#dce5f2}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:34px}
    .footer-brand strong{font-size:20px;color:#fff}
    .footer p{margin:12px 0;color:#aebbd0;font-size:13px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:14px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:8px 0;color:#aebbd0;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:18px;color:#8f9db4;font-size:12px}
    .video-page{background:#f7f8fb;padding:58px 0 5px;min-height:560px}
    .page-heading{text-align:center;max-width:720px;margin:0 auto 38px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:22px;height:2px;background:var(--accent)}
    .page-heading h1{margin:12px 0 10px;font-size:clamp(30px,4vw,48px);line-height:1.2;color:#18243b}
    .page-heading p{margin:0;color:var(--muted);font-size:15px}
    .video-toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:22px;padding:14px 18px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .video-toolbar strong{font-size:15px}
    .video-toolbar span{color:var(--muted);font-size:13px}
    .category-pills{display:flex;gap:8px;flex-wrap:wrap}
    .category-pills a{padding:6px 12px;border:1px solid #dfe5ef;border-radius:30px;color:#526078;font-size:12px;background:#fff}
    .category-pills a:hover{border-color:var(--primary);color:var(--primary)}
    .video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .video-card{overflow:hidden;background:#fff;border:1px solid #e6eaf1;border-radius:16px;box-shadow:0 8px 24px rgba(27,45,80,.05);transition:.2s}
    .video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .video-cover{position:relative;aspect-ratio:16/9;background:#dce4f1;overflow:hidden}
    .video-cover img{width:100%;height:100%;object-fit:cover}
    .play-mark{position:absolute;left:18px;bottom:16px;width:42px;height:42px;display:grid;place-items:center;border-radius:50%;background:rgba(11,61,145,.92);color:#fff;font-size:17px;padding-left:3px}
    .duration{position:absolute;right:12px;bottom:12px;padding:3px 7px;border-radius:5px;background:rgba(10,18,32,.78);color:#fff;font-size:11px}
    .video-body{padding:18px}
    .video-body h2{margin:0 0 8px;font-size:18px;line-height:1.4;color:#1c2b45}
    .video-body h2 a:hover{color:var(--primary)}
    .video-body p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;min-height:72px;margin:0;color:var(--muted);font-size:13px}
    .video-meta{display:flex;justify-content:space-between;gap:10px;margin-top:15px;padding-top:12px;border-top:1px solid #edf0f4;color:#8a95a7;font-size:12px}
    .video-more{margin-top:10px;color:var(--primary);font-size:12px;font-weight:700}
    .pagination{display:flex;justify-content:center;gap:8px;margin-top:38px}
    .pagination a{min-width:34px;padding:6px 11px;text-align:center;border:1px solid #dce3ee;border-radius:7px;background:#fff;color:#59677d;font-size:13px}
    .pagination a:hover,.pagination a.active{background:var(--primary);border-color:var(--primary);color:#fff}
    @media (max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .logo{min-width:0}
      .video-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:680px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{height:auto;min-height:38px;gap:5px;padding:7px 0;align-items:flex-start}
      .topbar-links{gap:8px;flex-direction:column;text-align:right}
      .header{height:68px}
      .header-inner{gap:10px}
      .header-btns{margin-left:auto}
      .member-link{display:none}
      .open-account{padding:8px 10px}
      .page-heading{margin-bottom:26px}
      .video-page{padding-top:38px}
      .video-toolbar{display:block}
      .category-pills{margin-top:12px}
      .video-grid{grid-template-columns:1fr;gap:16px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:7px}
    }
    @media (max-width:430px){
      .footer-grid{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
    }