:root{
      --theme:#0B3D91;
      --ink:#14213d;
      --muted:#65738b;
      --line:#e4eaf2;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 14px 40px rgba(20,45,85,.1);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;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}
    .container{width:min(1180px,calc(100% - 36px));margin:0 auto}
    .topbar{background:#071d45;color:#dce8fa;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--theme);font-size:20px;font-weight:800}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:4px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 15px;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:13px;color:#8591a5}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);display:none;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);padding:18px;z-index:30}
    .dropdown-panel{width:270px}
    .dropdown-panel a{display:block;padding:10px 12px;border-bottom:1px solid #eef2f7;font-size:14px}
    .mega-menu{width:720px}
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu,.nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel{display:block}
    .mega-menu:before,.dropdown-panel:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .mega-card{display:block;padding:12px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe;transition:.2s}
    .mega-card:hover{border-color:#9ab5e4;transform:translateY(-2px)}
    .mega-card img{width:42px;height:42px;object-fit:contain;border-radius:8px;margin-bottom:7px}
    .mega-card strong,.mega-card small{display:block}
    .mega-card strong{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card small{color:var(--muted);font-size:11px;line-height:1.5}
    .mega-footer{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--theme)}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-link{font-size:14px;color:var(--theme)}
    .open-account{padding:9px 15px;border-radius:7px;background:var(--theme);color:#fff;font-size:13px}
    .hamburger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:8px;cursor:pointer}
    .hamburger span{display:block;height:2px;background:var(--theme);margin:5px 0;transition:.2s}
    .drawer-overlay{position:fixed;inset:0;background:rgba(3,16,39,.48);opacity:0;visibility:hidden;transition:.25s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;right:-360px;top:0;width:min(350px,88vw);height:100vh;overflow:auto;background:#fff;z-index:50;transition:right .28s ease;box-shadow:-12px 0 35px rgba(0,0,0,.15)}
    .mobile-drawer.open{right:0}
    .drawer-head{height:70px;padding:0 20px;display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--line)}
    .drawer-head strong{flex:1;color:var(--theme)}
    .drawer-head a{color:var(--theme);font-size:14px}
    .drawer-close{border:0;background:none;font-size:30px;color:#667085;cursor:pointer}
    .drawer-menu{padding:12px 20px 32px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;text-align:left;border:0;border-bottom:1px solid #edf1f6;background:none;font:inherit;color:var(--ink);cursor:pointer}
    .drawer-group{border-bottom:1px solid #edf1f6}
    .drawer-toggle:after{content:"＋";float:right;color:#8190a8}
    .drawer-toggle.active{color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:0 0 8px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#071d45;color:#d9e4f7}
    .footer .container{padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:16px}
    .footer-brand strong{display:block;margin-bottom:10px;color:#fff;font-size:20px}
    .footer p{margin:7px 0;color:#b9c9e2;font-size:13px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:7px 0;color:#b9c9e2;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.15);color:#9eb1cd;font-size:12px}
    .video-page{padding:58px 0 0}
    .page-heading{text-align:center;max-width:740px;margin:0 auto 36px}
    .page-heading .eyebrow{display:inline-block;margin-bottom:8px;padding:4px 12px;border-radius:20px;background:#e7effb;color:var(--theme);font-size:13px;font-weight:700}
    .page-heading h1{margin:0 0 12px;font-size:clamp(30px,4vw,48px);line-height:1.2;color:#102b59}
    .page-heading p{margin:0;color:var(--muted)}
    .video-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px;padding:16px 20px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .video-toolbar strong{font-size:18px;color:var(--theme)}
    .video-toolbar span{color:var(--muted);font-size:14px}
    .video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .video-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 7px 22px rgba(33,61,104,.06);transition:.25s}
    .video-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .video-cover{position:relative;aspect-ratio:16/9;background:#dbe5f3;overflow:hidden}
    .video-cover img{width:100%;height:100%;object-fit:cover}
    .play-mark{position:absolute;left:50%;top:50%;width:48px;height:48px;display:grid;place-items:center;transform:translate(-50%,-50%);border-radius:50%;background:rgba(11,61,145,.9);color:#fff;font-size:20px;padding-left:3px}
    .duration{position:absolute;right:10px;bottom:9px;padding:2px 7px;border-radius:4px;background:rgba(0,0,0,.72);color:#fff;font-size:12px}
    .video-body{padding:17px}
    .video-body h2{margin:0 0 8px;font-size:18px;line-height:1.45;color:#173766}
    .video-body p{display:-webkit-box;overflow:hidden;margin:0 0 13px;color:var(--muted);font-size:14px;line-height:1.7;-webkit-box-orient:vertical;-webkit-line-clamp:3}
    .video-meta{display:flex;justify-content:space-between;gap:8px;color:#8793a7;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:38px}
    .pagination a{min-width:36px;padding:6px 12px;text-align:center;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--muted);font-size:14px}
    .pagination a:hover,.pagination a.active{background:var(--theme);border-color:var(--theme);color:#fff}
    @media(max-width:1050px){
      .header-inner{gap:12px}.logo{min-width:160px}.nav-link{padding-left:9px;padding-right:9px}
      .mega-menu{width:650px}
    }
    @media(max-width:820px){
      .topbar .container{min-height:34px}.topbar-links{gap:10px}
      .main-nav{display:none}.header-inner{min-height:68px}.header-btns{margin-left:auto}
      .hamburger{display:block}.member-link{display:none}
      .video-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:560px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{font-size:11px}.topbar-links a:first-child{display:none}
      .open-account{padding:8px 10px}
      .video-page{padding-top:38px}.page-heading{margin-bottom:25px}
      .video-toolbar{display:block}.video-toolbar span{display:block;margin-top:5px}
      .video-grid{grid-template-columns:1fr;gap:16px}
      .footer-grid{grid-template-columns:1fr;gap:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}
    }