:root{
      --theme:#0B3D91;
      --teal:#0891B2;
      --ink:#172033;
      --muted:#667085;
      --line:#dbe5ef;
      --soft:#f3f8fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(15,45,75,.11);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7fafc;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}
    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:#10243b;color:#dceaf3;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar p{margin:0}
    .topbar-contact{display:flex;gap:20px}
    .topbar a:hover{color:#fff}
    .header{background:#fff;border-bottom:1px solid #e6edf3;position:relative;z-index:20}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--theme);white-space:nowrap}
    .logo img{width:34px;height:34px;object-fit:contain}
    .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:6px;padding:27px 12px;color:#344054;font-size:14px;font-weight:700;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--teal)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);margin-top:-4px}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);opacity:0;visibility:hidden;pointer-events:none;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:20px;transition:.2s ease;min-width:270px}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;height:12px;top:-12px}
    .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-title,.mega-title{font-size:12px;color:var(--teal);font-weight:800;text-transform:uppercase;letter-spacing:.08em;margin:0 0 12px}
    .dropdown-list{display:grid;gap:8px}
    .dropdown-list a{font-size:14px;font-weight:700;padding:8px;border-radius:8px}
    .dropdown-list a:hover{background:var(--soft);color:var(--theme)}
    .dropdown-all,.mega-footer{display:block;color:var(--theme);font-size:13px;font-weight:800;border-top:1px solid var(--line);margin-top:14px;padding-top:13px}
    .mega-wide{width:min(760px,calc(100vw - 32px))}
    .mega-menu:not(.mega-wide){width:min(570px,calc(100vw - 32px))}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #e8eef3;border-radius:12px;min-width:0}
    .mega-card:hover{border-color:#8ccddd;background:#f6fcfd}
    .mega-card>img{width:42px;height:42px;object-fit:contain;border-radius:8px;flex:none}
    .mega-card-body{min-width:0;display:grid;gap:2px}
    .mega-card strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small,.mega-card p{font-size:11px;color:var(--muted);margin:0;line-height:1.45}
    .mega-category-list{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}
    .mega-category-list a{font-size:12px;color:var(--theme);background:#edf7fa;border-radius:999px;padding:5px 10px}
    .header-btns{display:flex;align-items:center;gap:12px}
    .header-btns>a:first-child,.account-link{font-size:13px;font-weight:800;color:var(--theme)}
    .account-link{border:1px solid var(--theme);border-radius:999px;padding:8px 14px}
    .account-link:hover{background:var(--theme);color:#fff}
    .hamburger{display:none;border:0;background:transparent;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(10,27,45,.5);z-index:40}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(380px,90vw);background:#fff;z-index:41;transform:translateX(105%);transition:.25s ease;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-overlay.open{display:block}
    .drawer-head{display:flex;align-items:center;gap:13px;padding:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}
    .drawer-head>a{margin-left:auto;color:var(--teal);font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;cursor:pointer;color:var(--muted)}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf1f4;background:none;text-align:left;color:var(--ink);font-weight:750;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--teal);font-size:20px;font-weight:400}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 0 8px 15px}
    .drawer-submenu.open{display:grid}
    .drawer-submenu a{padding:8px 0;color:var(--muted);font-size:14px}
    .footer{background:#10243b;color:#d8e4ed;margin-top:70px;padding:58px 0 22px}
    .footer .logo{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px}
    .footer-brand>p{font-size:13px;line-height:1.8;color:#aebdca;max-width:330px}
    .footer h3{font-size:14px;color:#fff;margin:0 0 15px}
    .footer-links,.footer-contact{display:grid;gap:9px;font-size:13px;color:#afbfcc}
    .footer a:hover{color:#fff}
    .footer-social{margin-top:16px}
    .footer-bottom{display:flex;justify-content:space-between;gap:15px;border-top:1px solid rgba(255,255,255,.13);margin-top:38px;padding-top:18px;color:#91a6b6;font-size:12px}
    .video-detail-main{padding:48px 0 0}
    .video-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:13px;margin-bottom:22px}
    .video-breadcrumb a{color:var(--theme);font-weight:700}
    .video-heading{max-width:850px;margin-bottom:28px}
    .video-heading h1{font-size:clamp(30px,5vw,54px);line-height:1.12;letter-spacing:-.035em;margin:0 0 14px;color:#10243b}
    .video-heading p{margin:0;color:var(--muted);font-size:17px}
    .video-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:30px;align-items:start}
    .video-main-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
    .video-player{background:#081522;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
    .video-player img{width:100%;height:100%;object-fit:cover;opacity:.72}
    .video-player:after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(8,145,178,.35),rgba(5,22,38,.5))}
    .video-player-content{position:absolute;z-index:1;text-align:center;color:#fff}
    .video-player-content .play-mark{width:74px;height:74px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--teal);font-size:27px;margin:0 auto 10px;padding-left:4px;box-shadow:0 8px 30px rgba(0,0,0,.25)}
    .video-player-content span{font-size:13px;font-weight:700}
    .video-info{padding:26px}
    .video-meta{display:flex;flex-wrap:wrap;gap:16px;color:var(--muted);font-size:13px;border-bottom:1px solid var(--line);padding-bottom:17px;margin-bottom:22px}
    .video-meta strong{color:var(--ink)}
    .video-body{min-width:0;max-width:100%;overflow-x:auto;color:#344054;font-size:16px}
    .video-body img,.video-body table{max-width:100%}
    .video-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}
    .video-tags a{background:#edf7fa;color:var(--theme);font-size:12px;padding:6px 11px;border-radius:999px}
    .video-sidebar{display:grid;gap:18px}
    .side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
    .side-card h2{font-size:17px;margin:0 0 15px;color:#10243b}
    .side-card p{font-size:13px;color:var(--muted);margin:0 0 15px}
    .side-link{display:block;padding:12px 0;border-top:1px solid #edf1f4;font-size:13px;font-weight:700}
    .side-link:hover{color:var(--teal)}
    .related-video{display:grid;grid-template-columns:84px 1fr;gap:10px;align-items:start}
    .related-video img{width:84px;height:58px;object-fit:cover;border-radius:8px;background:#e8f3f6}
    .related-video strong{display:block;font-size:12px;line-height:1.4}
    .related-video small{color:var(--muted);font-size:11px}
    .video-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
    .button-primary,.button-secondary{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:11px 17px;font-size:13px;font-weight:800}
    .button-primary{background:var(--theme);color:#fff}
    .button-primary:hover{background:#082e6f}
    .button-secondary{border:1px solid var(--line);color:var(--theme);background:#fff}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
    }
    @media(max-width:780px){
      .container{width:min(100% - 28px,620px)}
      .topbar-inner{padding:8px 0;align-items:flex-start}
      .topbar-contact{display:grid;gap:2px;text-align:right}
      .header-inner{min-height:68px}
      .header-btns>a:first-child{display:none}
      .account-link{padding:7px 11px}
      .video-detail-main{padding-top:30px}
      .video-layout{grid-template-columns:1fr}
      .video-heading h1{font-size:35px}
      .video-heading p{font-size:15px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:grid}
    }
    @media(max-width:480px){
      .footer-grid{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
      .video-info{padding:19px}
      .video-meta{gap:8px 14px}
      .mega-grid{grid-template-columns:1fr}
    }