:root{
      --theme:#0B3D91;
      --ink:#101827;
      --muted:#64748b;
      --line:#e5e7eb;
      --paper:#f6f8fb;
      --white:#fff;
      --gold:#d8a84e;
      --red:#a91f2b;
      --shadow:0 18px 50px rgba(15,35,70,.12);
    }
    *{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}
    body.drawer-lock{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#081b3c;color:#d9e4f7;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:30;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;white-space:nowrap;color:var(--theme)}
    .logo img{width:36px;height:36px;object-fit:contain}
    .logo span{font-size:18px}
    .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:flex;align-items:center;gap:5px;padding:27px 13px;font-size:15px;font-weight:600}
    .has-arrow:after{content:"⌄";font-size:13px;color:#94a3b8}
    .nav-link:hover{color:var(--theme)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(8px);width:340px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s ease}
    .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;top:-12px;left:0;right:0;height:12px}
    .dropdown-title,.mega-head strong{display:block;margin:0 0 4px;font-size:16px}
    .mega-head span{font-size:12px;color:var(--muted)}
    .dropdown-list{display:grid;gap:8px;margin:15px 0}
    .dropdown-list a,.mega-categories a{font-size:13px;color:#334155}
    .dropdown-list a:hover,.mega-categories a:hover{color:var(--theme)}
    .dropdown-more,.mega-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:13px;color:var(--theme);font-size:13px;font-weight:700}
    .mega-menu{width:760px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:17px 0}
    .mega-card{min-width:0;padding:12px;border:1px solid var(--line);border-radius:10px;background:#fff}
    .mega-card:hover{border-color:var(--theme);box-shadow:0 8px 20px rgba(11,61,145,.1)}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:7px}
    .mega-card img.cover{width:100%;height:70px;object-fit:cover;border-radius:7px}
    .mega-card strong{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card p{margin:4px 0 0;color:var(--muted);font-size:11px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .mega-meta{display:flex;flex-wrap:wrap;gap:4px 9px;color:var(--muted);font-size:10px;margin-top:5px}
    .mega-categories{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0;padding-bottom:14px;border-bottom:1px solid var(--line)}
    .mega-categories a{padding:4px 9px;background:#f1f5f9;border-radius:99px}
    .header-btns{display:flex;align-items:center;gap:12px}
    .member-entry{font-size:13px;color:var(--theme);white-space:nowrap}
    .account-entry{padding:8px 15px;border-radius:5px;background:var(--theme);color:#fff;font-size:13px;white-space:nowrap}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);background:#fff;border-radius:6px;padding:8px}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--ink);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{display:none;position:fixed;inset:0;background:rgba(3,12,30,.55);z-index:50}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(390px,88vw);background:#fff;z-index:60;transform:translateX(100%);transition:.25s ease;overflow-y:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:16px;padding:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:700}
    .drawer-head>a{margin-left:auto;background:var(--theme);color:#fff;border-radius:5px;padding:5px 10px;font-size:12px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;color:#64748b;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 var(--line);background:none;text-align:left;color:var(--ink);font-weight:600;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#94a3b8}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 8px 16px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#091a38;color:#cad7ec}
    .footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:35px;padding:48px 0}
    .footer .logo{color:#fff}
    .footer-brand p{max-width:310px;color:#9fb0cb;font-size:13px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-links,.footer-contact{display:grid;gap:8px;font-size:13px;color:#aebed5}
    .footer a:hover{color:#fff}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.12)}
    .footer-bottom-inner{display:flex;justify-content:space-between;gap:20px;padding:18px 0;color:#91a4c0;font-size:12px}
    .video-page{padding:48px 0 0}
    .video-page .page-heading{text-align:center;max-width:720px;margin:0 auto 35px}
    .video-page .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--red);font-size:13px;font-weight:800;letter-spacing:.12em}
    .video-page .eyebrow:before{content:"";width:28px;height:2px;background:var(--gold)}
    .video-page h1{margin:10px 0 8px;font-size:clamp(30px,5vw,48px);line-height:1.2;color:#0d1b36}
    .video-page .intro{margin:0;color:var(--muted);font-size:15px}
    .video-filter{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:25px 0 34px}
    .video-filter a{padding:8px 17px;border:1px solid #d9e0ea;background:#fff;border-radius:99px;color:#526174;font-size:13px}
    .video-filter a:hover,.video-filter a.active{background:var(--theme);border-color:var(--theme);color:#fff}
    .video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .video-card{overflow:hidden;background:#fff;border:1px solid #e4e9f0;border-radius:14px;box-shadow:0 8px 22px rgba(24,48,88,.06);transition:.2s}
    .video-card:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(24,48,88,.13)}
    .video-cover{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#07152e,#253d68);overflow:hidden}
    .video-cover img{width:100%;height:100%;object-fit:cover}
    .video-play{position:absolute;left:18px;bottom:16px;width:40px;height:40px;display:grid;place-items:center;border-radius:50%;background:var(--red);color:#fff;font-size:17px;box-shadow:0 4px 12px rgba(0,0,0,.25)}
    .video-duration{position:absolute;right:12px;bottom:12px;padding:2px 7px;background:rgba(0,0,0,.72);border-radius:4px;color:#fff;font-size:11px}
    .video-body{padding:17px 18px 19px}
    .video-category{font-size:11px;color:var(--red);font-weight:700}
    .video-card h2{margin:6px 0 7px;font-size:17px;line-height:1.45}
    .video-card p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:44px;margin:0;color:var(--muted);font-size:13px}
    .video-meta{display:flex;justify-content:space-between;gap:10px;margin-top:14px;padding-top:11px;border-top:1px solid #edf0f4;color:#8793a4;font-size:11px}
    .pagination{display:flex;justify-content:center;gap:8px;margin:38px 0 5px}
    .pagination a{min-width:34px;padding:5px 10px;text-align:center;border:1px solid #dbe2ec;background:#fff;border-radius:5px;color:#526174;font-size:13px}
    .pagination a:hover,.pagination a.current,.pagination a.active{background:var(--theme);border-color:var(--theme);color:#fff}
    @media (max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .footer-main{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:7px 0;display:block;text-align:center}
      .topbar-contact{justify-content:center;margin-top:3px;gap:12px}
      .header-inner{height:66px;gap:12px}
      .header-btns{margin-left:auto}
      .member-entry{display:none}
      .mega-grid{grid-template-columns:1fr 1fr}
      .video-page{padding-top:32px}
      .video-grid{grid-template-columns:1fr}
      .video-page .page-heading{margin-bottom:25px}
      .footer-main{grid-template-columns:1fr;gap:24px;padding:35px 0}
      .footer-bottom-inner{display:block;line-height:2}
    }