:root{--primary:#0B3D91;--ink:#172033;--muted:#687386;--line:#e4e8ef;--soft:#f5f7fb;--white:#fff;--shadow:0 16px 40px rgba(16,35,69,.1)}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;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}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#0e1b33;color:#dce5f5;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between}
    .topbar-contact{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{height:76px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-weight:800;font-size:18px;color:var(--primary)}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:2px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;height:76px;padding:0 14px;font-size:15px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus-within{color:var(--primary)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 3px 8px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);visibility:hidden;opacity:0;transition:.2s ease;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 14px 14px}
    .dropdown-panel{width:260px;padding:12px}
    .dropdown-panel a{display:block;padding:10px 12px;border-radius:8px;font-size:14px}
    .dropdown-panel a:hover{background:var(--soft);color:var(--primary)}
    .dropdown-footer,.mega-footer{color:var(--primary)!important;font-weight:700;border-top:1px solid var(--line);margin-top:8px;padding-top:13px!important}
    .mega-menu{width:min(920px,calc(100vw - 30px));padding:22px}
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu,.nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel{visibility:visible;opacity:1}
    .mega-title-row{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:16px}
    .mega-title-row strong{font-size:17px}
    .mega-title-row span{font-size:13px;color:var(--muted)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .mega-card{display:block;border:1px solid var(--line);border-radius:10px;padding:12px;background:#fff;transition:.2s}
    .mega-card:hover{border-color:#adc3ec;transform:translateY(-2px)}
    .mega-card-head{display:flex;align-items:center;gap:10px}
    .mega-card-head img{width:34px;height:34px;object-fit:contain}
    .mega-card strong{font-size:14px}
    .mega-card p{font-size:12px;color:var(--muted);margin:6px 0 0}
    .mega-card>img{width:100%;height:74px;object-fit:cover;border-radius:7px;margin-bottom:8px}
    .mega-meta{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:11px;margin-top:9px}
    .rating{display:block;color:#cc8b19;font-size:11px;font-weight:400}
    .category-links{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 16px}
    .category-links a{padding:5px 12px;background:#f1f5fb;border-radius:20px;color:var(--primary);font-size:12px}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-entry{font-size:14px;color:var(--primary);font-weight:700}
    .account-entry{background:var(--primary);color:#fff;border-radius:7px;padding:7px 14px;font-size:13px}
    .hamburger{display:none;width:40px;height:40px;border:0;background:transparent;cursor:pointer;padding:8px}
    .hamburger span{display:block;height:2px;background:var(--primary);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(8,18,38,.48);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(360px,88vw);background:#fff;z-index:50;transform:translateX(100%);transition:.25s;overflow:auto;box-shadow:-10px 0 35px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:18px;border-bottom:1px solid var(--line);color:var(--primary);font-weight:700}
    .drawer-head>a{margin-left:auto;background:var(--primary);color:#fff;padding:5px 11px;border-radius:5px;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer;color:#657084}
    .drawer-menu{padding:10px 18px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 2px;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:var(--ink);font-weight:600;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--primary);font-size:20px;font-weight:400}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 12px;background:#f7f9fc;border-radius:7px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    body.drawer-locked{overflow:hidden}
    .video-page{padding:60px 0 78px;min-height:600px}
    .video-heading{text-align:center;max-width:760px;margin:0 auto 34px}
    .eyebrow{display:inline-block;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:2px;margin-bottom:9px}
    .video-heading h1{margin:0 0 12px;font-size:clamp(30px,4vw,46px);line-height:1.2;color:#101b31}
    .video-heading p{margin:0;color:var(--muted);font-size:16px}
    .video-toolbar{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:24px;padding:16px 20px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .video-toolbar strong{font-size:18px}
    .video-toolbar span{color:var(--muted);font-size:14px}
    .video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
    .video-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 5px 18px rgba(25,42,70,.04);transition:.25s}
    .video-item:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#b6c9ea}
    .video-cover{position:relative;background:#dce5f4;aspect-ratio:16/9;overflow:hidden}
    .video-cover img{width:100%;height:100%;object-fit:cover}
    .play-badge{position:absolute;left:16px;bottom:14px;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:rgba(11,61,145,.94);color:#fff;font-size:17px;padding-left:3px}
    .duration{position:absolute;right:12px;bottom:12px;background:rgba(0,0,0,.72);color:#fff;border-radius:4px;padding:2px 7px;font-size:12px}
    .video-body{padding:17px 18px 18px}
    .video-body h2{font-size:18px;line-height:1.45;margin:0 0 8px}
    .video-body h2 a:hover{color:var(--primary)}
    .video-body p{color:var(--muted);font-size:14px;line-height:1.7;margin:0 0 14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .video-meta{display:flex;justify-content:space-between;gap:10px;color:#8792a4;font-size:12px;border-top:1px solid var(--line);padding-top:12px}
    .pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:38px}
    .pagination a{min-width:36px;text-align:center;padding:6px 11px;border:1px solid var(--line);background:#fff;border-radius:6px;color:#536078;font-size:14px}
    .pagination a:hover,.pagination a.active{background:var(--primary);border-color:var(--primary);color:#fff}
    .footer{background:#101b30;color:#c8d2e3;padding:52px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:38px}
    .footer .logo{color:#fff;margin-bottom:15px}
    .footer-brand p{font-size:13px;color:#aebbd0;max-width:300px;margin:0}
    .footer h3{font-size:15px;color:#fff;margin:4px 0 15px}
    .footer-links{display:grid;gap:8px}
    .footer-links a,.footer-contact a,.footer-contact div{font-size:13px;color:#aebbd0}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-contact{display:grid;gap:8px}
    .social-entry{color:#83b0ff!important;margin-top:5px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.13);margin-top:40px;padding-top:18px;color:#8998af;font-size:12px}
    .risk-note{max-width:620px;text-align:right}
    @media (max-width:960px){
      .main-nav{display:none}.hamburger{display:block}.header-inner{height:68px}.footer-grid{grid-template-columns:repeat(2,1fr)}
      .video-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:7px 0;display:block;text-align:center}.topbar-contact{justify-content:center;gap:12px;margin-top:2px}
      .header-btns{margin-left:auto}.member-entry{display:none}.account-entry{font-size:12px;padding:6px 10px}
      .video-page{padding:38px 0 55px}.video-heading h1{font-size:31px}.video-heading p{font-size:14px}
      .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}.risk-note{text-align:left;margin-top:10px}
      .mega-grid{grid-template-columns:1fr}.mega-title-row{display:block}.mega-title-row span{display:block;margin-top:4px}
    }