:root{
      --theme:#0B3D91;
      --theme-deep:#082b66;
      --ink:#172238;
      --muted:#6d7888;
      --line:#e4e9f0;
      --paper:#f6f8fb;
      --white:#fff;
      --shadow:0 16px 42px rgba(20,39,74,.09);
      --radius:14px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);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}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 36px));margin:0 auto}

    .topbar{background:#071b3b;color:#dce7fa;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:28px}
    .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--theme-deep);font-size:19px;font-weight:800;white-space:nowrap}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:3px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:76px;padding:0 14px;color:#25324a;font-size:15px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 3px 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:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}
    .mega-menu{width:620px}
    .nav-item:after{content:"";position:absolute;left:0;right:0;top:100%;height:10px}
    .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)}
    .menu-title{margin:0 0 12px;color:var(--theme);font-weight:800;font-size:14px}
    .menu-list{display:grid;gap:8px}
    .menu-list a{display:block;padding:7px 8px;border-radius:7px;color:#39465c;font-size:14px}
    .menu-list a:hover{background:#eef4ff;color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;min-height:82px;padding:10px;border:1px solid var(--line);border-radius:9px;background:#fbfcfe;font-size:13px}
    .mega-card:hover{border-color:#a9c2ec;background:#f1f6ff}
    .mega-card img{width:27px;height:27px;object-fit:contain;margin-bottom:5px}
    .mega-card b{font-size:13px}
    .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(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member{color:var(--theme);font-size:14px;font-weight:700}
    .open-account{padding:9px 15px;background:var(--theme);color:#fff;border-radius:7px;font-size:13px;font-weight:700}
    .hamburger{display:none;width:40px;height:38px;padding:8px;border:1px solid var(--line);border-radius:7px;background:#fff;cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--theme);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(3,17,42,.5);opacity:0;visibility:hidden;z-index:60;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(390px,88vw);padding:20px;background:#fff;z-index:61;overflow-y:auto;transform:translateX(100%);transition:.28s ease;box-shadow:-10px 0 35px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding-bottom:18px;border-bottom:1px solid var(--line);font-weight:800}
    .drawer-head span{margin-right:auto;color:var(--theme)}
    .drawer-head a{padding:6px 11px;border-radius:6px;background:var(--theme);color:#fff;font-size:13px}
    .drawer-close{border:0;background:none;color:#526078;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding-top:12px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 3px;border:0;border-bottom:1px solid #edf0f5;background:none;color:#27344b;text-align:left;font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 14px;background:#f6f8fc}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:#657086;font-size:14px}

    .video-page{padding:58px 0 78px}
    .video-page .page-heading{text-align:center;max-width:760px;margin:0 auto 36px}
    .video-page .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.12em}
    .video-page .eyebrow:before{content:"";width:26px;height:2px;background:var(--theme)}
    .video-page h1{margin:10px 0 12px;font-size:clamp(30px,4vw,48px);line-height:1.25;color:#10254b}
    .video-page .intro{margin:0;color:var(--muted);font-size:16px}
    .video-filter{display:flex;flex-wrap:wrap;justify-content:center;gap:9px;margin:0 auto 34px}
    .video-filter a{padding:7px 15px;border:1px solid #d5deed;border-radius:30px;background:#fff;color:#53627a;font-size:13px}
    .video-filter a.active,.video-filter a:hover{border-color:var(--theme);background:var(--theme);color:#fff}
    .video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
    .video-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(24,48,89,.05);transition:transform .2s,box-shadow .2s}
    .video-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .video-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:#dce6f5}
    .video-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
    .video-card:hover .video-cover img{transform:scale(1.04)}
    .video-play{position:absolute;left:50%;top:50%;display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:rgba(11,61,145,.9);color:#fff;transform:translate(-50%,-50%);font-size:19px;padding-left:3px}
    .video-duration{position:absolute;right:10px;bottom:10px;padding:2px 7px;border-radius:4px;background:rgba(7,27,59,.82);color:#fff;font-size:12px}
    .video-body{padding:18px 19px 20px}
    .video-body h2{margin:0 0 8px;color:#162d58;font-size:18px;line-height:1.45}
    .video-body h2 a:hover{color:var(--theme)}
    .video-body p{display:-webkit-box;overflow:hidden;margin:0;color:var(--muted);font-size:14px;line-height:1.75;-webkit-box-orient:vertical;-webkit-line-clamp:3}
    .video-meta{display:flex;justify-content:space-between;gap:10px;margin-top:15px;padding-top:12px;border-top:1px solid #edf0f5;color:#8b95a5;font-size:12px}
    .pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:42px}
    .pagination a{min-width:36px;padding:7px 11px;border:1px solid #d7dfec;border-radius:6px;background:#fff;text-align:center;color:#52627a;font-size:13px}
    .pagination a.active,.pagination a:hover{border-color:var(--theme);background:var(--theme);color:#fff}

    .footer{padding:48px 0 0;background:#071b3b;color:#c6d2e6}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:38px;padding-bottom:38px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:16px}
    .footer p{margin:0 0 10px;color:#aebdd3;font-size:13px;line-height:1.9}
    .footer a{display:block;margin:7px 0;color:#aebdd3;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-bottom{padding:18px 0;border-top:1px solid rgba(255,255,255,.13);color:#8fa3c0;font-size:12px}

    @media (max-width:900px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .member{display:none}
      .mega-menu{width:min(620px,calc(100vw - 40px))}
      .video-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{align-items:flex-start;flex-direction:column;gap:0;padding:7px 0;line-height:1.7}
      .header-inner{min-height:64px;gap:10px}
      .logo{font-size:16px}
      .logo img{width:32px;height:32px}
      .open-account{display:none}
      .video-page{padding:38px 0 55px}
      .video-page .page-heading{margin-bottom:25px}
      .video-page h1{font-size:31px}
      .video-grid{grid-template-columns:1fr;gap:18px}
      .video-body{padding:15px 16px 17px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer{padding-top:36px}
      .mega-grid{grid-template-columns:repeat(2,1fr)}
    }