:root{
      --theme:#0B3D91;
      --ink:#101828;
      --muted:#667085;
      --line:#e4e7ec;
      --paper:#f6f8fb;
      --gold:#d9a441;
      --red:#b42318;
      --shadow:0 18px 45px rgba(16,24,40,.09);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang 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% - 40px));margin:0 auto}

    .topbar{background:#081d42;color:#d9e5ff;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:22px}
    .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;min-width:190px;font-size:19px;font-weight:800;color:#0b285c}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:2px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:25px 13px;font-size:14px;font-weight:650;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);width:280px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);padding:16px;opacity:0;visibility:hidden;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;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-panel>a{display:block;padding:9px 10px;border-bottom:1px solid #f0f2f5;font-size:13px}
    .dropdown-panel>a:hover,.mega-card:hover{background:#f1f5fb;color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:flex;gap:9px;min-height:74px;padding:11px;border:1px solid #edf0f5;border-radius:11px;transition:.2s}
    .mega-card img{width:28px;height:28px;object-fit:contain;flex:none}
    .mega-card strong{display:block;font-size:13px;line-height:1.35}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.45;margin-top:3px}
    .mega-footer{display:block;margin:14px -16px -16px;padding:12px 16px;text-align:center;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-link{font-size:13px;color:var(--theme);font-weight:700}
    .open-account{padding:9px 15px;border-radius:8px;background:var(--theme);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}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--theme);transition:.2s}

    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(4,16,38,.52);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(390px,88vw);background:#fff;z-index:50;transform:translateX(100%);transition:.25s ease;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:16px;padding:22px;border-bottom:1px solid var(--line);font-weight:800}
    .drawer-head>a{margin-left:auto;color:var(--theme)}
    .drawer-close{border:0;background:none;font-size:30px;line-height:1;cursor:pointer;color:var(--muted)}
    .drawer-menu{padding:12px 22px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #eef1f5;background:none;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--muted)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}

    .video-page{padding:58px 0 86px}
    .page-heading{text-align:center;max-width:760px;margin:0 auto 34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--red);font-size:13px;font-weight:800;letter-spacing:.12em}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--gold)}
    .page-heading h1{margin:12px 0 10px;font-size:clamp(32px,5vw,56px);line-height:1.15;letter-spacing:-.04em;color:#102d61}
    .page-heading p{margin:0;color:var(--muted);font-size:16px}
    .category-bar{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px;margin:0 auto 38px}
    .category-bar a{padding:8px 18px;border:1px solid #d8e0ef;border-radius:99px;background:#fff;color:#52627d;font-size:14px;transition:.2s}
    .category-bar a:hover,.category-bar a.active{background:var(--theme);border-color: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 #e8ebf1;border-radius:var(--radius);box-shadow:0 7px 22px rgba(16,24,40,.04);transition:.25s}
    .video-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .video-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:#071426}
    .video-cover img{width:100%;height:100%;object-fit:cover;transition:.35s}
    .video-card:hover .video-cover img{transform:scale(1.04)}
    .play-mark{position:absolute;left:18px;bottom:16px;display:grid;place-items:center;width:46px;height:46px;border-radius:50%;background:var(--red);color:#fff;box-shadow:0 5px 18px rgba(180,35,24,.35)}
    .play-mark:after{content:"";margin-left:3px;border-top:7px solid transparent;border-bottom:7px solid transparent;border-left:10px solid #fff}
    .duration{position:absolute;right:12px;bottom:12px;padding:3px 8px;border-radius:5px;background:rgba(0,0,0,.72);color:#fff;font-size:12px}
    .video-body{padding:20px}
    .video-kicker{color:var(--red);font-size:12px;font-weight:800}
    .video-body h2{margin:7px 0 8px;font-size:19px;line-height:1.45;color:#142e5c}
    .video-body p{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden;min-height:72px;margin:0;color:var(--muted);font-size:14px}
    .video-meta{display:flex;justify-content:space-between;gap:10px;margin-top:17px;padding-top:13px;border-top:1px solid #edf0f4;color:#8b95a7;font-size:12px}
    .video-meta a{color:var(--theme);font-weight:700}
    .pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:46px}
    .pagination a{min-width:38px;padding:7px 12px;text-align:center;border:1px solid #dce3ef;border-radius:8px;background:#fff;color:#53627b;font-size:13px}
    .pagination a:hover,.pagination a.current,.pagination a.active{background:var(--theme);border-color:var(--theme);color:#fff}
    .video-note{margin:50px auto 0;padding:25px 30px;max-width:900px;border-left:4px solid var(--gold);border-radius:12px;background:#fffaf0;color:#66512c;font-size:14px}

    .footer{padding:56px 0 20px;background:#071b3b;color:#c4d0e5}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px}
    .footer-brand strong{display:block;margin-bottom:12px;color:#fff;font-size:20px}
    .footer p{margin:7px 0;font-size:13px}
    .footer h3{margin:0 0 13px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:7px 0;color:#c4d0e5;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:#91a3c0}

    @media(max-width:1050px){
      .nav-link{padding-left:8px;padding-right:8px}
      .logo{min-width:150px}
      .mega-menu{width:650px}
    }
    @media(max-width:800px){
      .container{width:min(100% - 30px,620px)}
      .topbar .container{min-height:48px;align-items:flex-start;flex-direction:column;justify-content:center;gap:0}
      .topbar-links{gap:13px;font-size:12px}
      .main-nav{display:none}
      .header-inner{min-height:66px;justify-content:space-between}
      .header-btns{margin-left:auto}
      .member-link{display:none}
      .hamburger{display:block}
      .video-page{padding:42px 0 62px}
      .video-grid{grid-template-columns:repeat(2,1fr);gap:16px}
      .video-body{padding:16px}
      .video-body h2{font-size:17px}
      .video-body p{min-height:68px}
      .footer-grid{grid-template-columns:repeat(2,1fr);gap:25px}
    }
    @media(max-width:520px){
      .logo{font-size:16px;min-width:0}
      .logo img{width:32px;height:32px}
      .open-account{padding:8px 11px}
      .topbar-links{flex-wrap:wrap}
      .page-heading h1{font-size:35px}
      .page-heading p{font-size:14px}
      .category-bar{justify-content:flex-start;margin-bottom:28px}
      .category-bar a{padding:7px 13px;font-size:13px}
      .video-grid{grid-template-columns:1fr}
      .video-body p{min-height:0}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{flex-direction:column;gap:5px}
    }