:root{
      --theme:#0B3D91;
      --ink:#172033;
      --muted:#687386;
      --line:#e6eaf0;
      --soft:#f5f7fb;
      --white:#fff;
      --shadow:0 14px 40px rgba(16,34,69,.08);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#10213d;color:#dbe7fa;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between}
    .topbar a{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-size:18px;font-weight:800;color:var(--theme)}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:26px 13px;color:#26334a;font-size:14px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";margin-left:6px;color:#8d99aa}
    .dropdown-panel,.mega-menu{
      position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);
      width:320px;padding:20px;background:#fff;border:1px solid var(--line);
      border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;
      transition:.2s;z-index:30
    }
    .mega-menu{width:650px}
    .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}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .drop-title,.mega-title{display:block;margin-bottom:13px;color:var(--theme);font-size:15px}
    .drop-list{display:grid;gap:8px}
    .drop-list a{display:block;padding:6px 0;color:#44536b;font-size:13px}
    .drop-list a:hover{color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe}
    .mega-card:hover{border-color:#9db4dc;background:#f4f8ff}
    .mega-card img{width:100%;height:62px;object-fit:cover;border-radius:7px;margin-bottom:7px}
    .mega-card strong{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.5;margin-top:3px}
    .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:12px;white-space:nowrap}
    .member-link{font-size:13px;color:#4b5a70}
    .open-account{padding:9px 16px;border-radius:8px;color:#fff;background:var(--theme);font-size:13px;font-weight:700}
    .hamburger{display:none;width:40px;height:38px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:8px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;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)}
    .mobile-drawer{position:fixed;top:0;right:-360px;width:min(360px,88vw);height:100vh;z-index:60;background:#fff;overflow:auto;transition:right .25s;box-shadow:-10px 0 35px rgba(0,0,0,.18)}
    .mobile-drawer.open{right:0}
    .drawer-overlay{position:fixed;inset:0;background:rgba(9,20,39,.48);z-index:50;opacity:0;visibility:hidden;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head span{flex:1;color:var(--theme)}
    .drawer-head a{padding:6px 12px;border-radius:6px;background:var(--theme);color:#fff;font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;cursor:pointer;color:#5b687b}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:var(--ink);font:inherit;font-size:14px;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#8592a3}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 7px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:13px}
    .footer{margin-top:70px;background:#101d34;color:#b7c5da}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:38px;padding:48px 0 35px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer p{margin:6px 0;font-size:13px}
    .footer-brand strong{display:block;margin-bottom:12px;color:#fff;font-size:20px}
    .footer-grid>div>a{display:block;margin:7px 0;color:#b7c5da;font-size:13px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{padding:18px 0;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#93a3bc}
    .video-page{padding:58px 0 0;background:linear-gradient(180deg,#f7f9fc 0,#fff 430px)}
    .page-heading{text-align:center;max-width:760px;margin:0 auto 38px}
    .eyebrow{display:inline-block;padding:5px 12px;border-radius:30px;background:#e8f0fc;color:var(--theme);font-size:12px;font-weight:700}
    .page-heading h1{margin:13px 0 8px;font-size:clamp(28px,4vw,44px);letter-spacing:.02em}
    .page-heading p{margin:0;color:var(--muted);font-size:15px}
    .category-tabs{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:0 auto 34px}
    .category-tabs a{padding:8px 17px;border:1px solid #d9e1ed;border-radius:30px;background:#fff;color:#52627a;font-size:13px}
    .category-tabs a:hover,.category-tabs a.active{border-color:var(--theme);background:var(--theme);color:#fff}
    .video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .video-card{display:flex;flex-direction:column;min-width:0;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(26,45,78,.05);transition:.2s}
    .video-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .video-cover{position:relative;aspect-ratio:16/9;background:#dfe7f2;overflow:hidden}
    .video-cover img{width:100%;height:100%;object-fit:cover;transition:.3s}
    .video-card:hover .video-cover img{transform:scale(1.04)}
    .play-mark{position:absolute;left:16px;bottom:14px;width:38px;height:38px;display:grid;place-items:center;border-radius:50%;background:rgba(11,61,145,.92);color:#fff;font-size:16px}
    .duration{position:absolute;right:12px;bottom:10px;padding:2px 7px;border-radius:4px;background:rgba(0,0,0,.7);color:#fff;font-size:11px}
    .video-body{padding:17px 18px 19px}
    .video-body h2{margin:0 0 8px;font-size:17px;line-height:1.45}
    .video-body h2 a:hover{color:var(--theme)}
    .video-body p{display:-webkit-box;overflow:hidden;margin:0 0 13px;color:var(--muted);font-size:13px;line-height:1.7;-webkit-box-orient:vertical;-webkit-line-clamp:3}
    .video-meta{display:flex;justify-content:space-between;gap:10px;color:#8a96a8;font-size:12px}
    .pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:42px}
    .pagination a{min-width:36px;padding:7px 12px;border:1px solid var(--line);border-radius:7px;text-align:center;color:#5d6b80;font-size:13px}
    .pagination a:hover,.pagination a.current,.pagination a.active{border-color:var(--theme);background:var(--theme);color:#fff}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{justify-content:space-between}
      .mega-menu{width:calc(100vw - 40px)}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,600px)}
      .topbar .container{display:block;padding:8px 0;text-align:center}
      .top-contact{display:block}
      .header-inner{height:68px;gap:10px}
      .logo{min-width:0;font-size:16px}
      .header-btns{gap:7px}
      .member-link{display:none}
      .open-account{padding:8px 10px;font-size:12px}
      .video-page{padding-top:38px}
      .video-grid{grid-template-columns:1fr;gap:17px}
      .page-heading{margin-bottom:28px}
      .page-heading h1{font-size:30px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px;padding:35px 0 25px}
    }
    @media(max-width:480px){
      .footer-grid{grid-template-columns:1fr}
      .mega-grid{grid-template-columns:1fr 1fr}
    }