:root{--blue:#0B3D91;--ink:#17233c;--muted:#64748b;--line:#e2e8f0;--paper:#f7f9fc;--gold:#d99b35}
    *{box-sizing:border-box}
    html,body{margin:0;padding:0;color:var(--ink);font-family:Arial,"Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--paper);line-height:1.65}
    a{color:inherit;text-decoration:none}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#101a2d;color:#d7e0f0;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar a{margin-left:20px;color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 4px 18px #17233c0b}
    .header-inner{height:76px;display:flex;align-items:center;gap:32px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-size:20px;font-weight:800;color:var(--blue)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;justify-content:center;align-items:stretch;gap:4px;padding:0;margin:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:block;padding:25px 14px;color:#263550;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--blue)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8290a6}
    .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 12px 12px;box-shadow:0 18px 42px #17233c20;padding:18px;min-width:250px}
    .mega-menu{width:440px}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{display:block}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-10px;height:10px}
    .dropdown-panel>a{display:block;padding:8px 10px;border-radius:7px;font-size:13px}
    .dropdown-panel>a:hover,.mega-grid>a:hover{background:#f0f5ff;color:var(--blue)}
    .mega-title{margin:0 0 10px;font-weight:800;color:var(--blue);font-size:14px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
    .mega-grid>a{display:block;padding:9px;border-radius:8px;background:#f8fafc;font-size:13px}
    .mega-grid strong,.mega-grid small{display:block}
    .mega-grid small{color:var(--muted);font-size:11px;line-height:1.5;margin-top:3px}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--blue);font-weight:700}
    .broker-mini,.video-mini{min-height:63px}
    .product-mini{display:grid!important;grid-template-columns:27px 1fr;column-gap:7px}
    .product-mini img{width:27px;height:27px;object-fit:contain;grid-row:span 2}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-btn{font-size:13px;color:var(--blue);font-weight:700}
    .open-btn{background:var(--blue);color:#fff;padding:9px 17px;border-radius:7px;font-size:13px}
    .hamburger{display:none;width:40px;height:38px;border:1px solid var(--line);background:#fff;border-radius:7px;padding:8px;cursor:pointer}
    .hamburger span{display:block;height:2px;background:var(--blue);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;z-index:40;inset:0;background:#08122599}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:50;right:0;top:0;bottom:0;width:min(390px,88vw);background:#fff;transform:translateX(100%);transition:transform .25s ease;overflow:auto;box-shadow:-12px 0 35px #08122526}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--line)}
    .drawer-head strong{flex:1;color:var(--blue)}
    .drawer-head a{background:var(--blue);color:#fff;border-radius:6px;padding:6px 12px;font-size:13px}
    .drawer-close{font-size:26px;border:0;background:none;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:12px 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-size:15px;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:13px}
    .footer{margin-top:70px;background:#101a2d;color:#c5d0e2}
    .footer .container{padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px}
    .footer h3{font-size:15px;color:#fff;margin:0 0 15px}
    .footer p{margin:6px 0;font-size:13px}
    .footer-brand strong{color:#fff;font-size:20px}
    .footer-brand p{max-width:300px}
    .footer-grid>div>a{display:block;color:#c5d0e2;font-size:13px;margin:7px 0}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{border-top:1px solid #ffffff1c;margin-top:30px;padding-top:18px;font-size:12px;color:#93a3bc}
    .video-detail-main{padding:42px 0 10px}
    .video-breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}
    .video-breadcrumb a{color:var(--blue)}
    .video-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:28px;align-items:start}
    .video-content-card,.video-side{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 25px #17233c08}
    .video-content-card{padding:28px}
    .video-title{margin:0;color:#13223d;font-size:clamp(25px,4vw,42px);line-height:1.25}
    .video-meta{display:flex;flex-wrap:wrap;gap:16px;color:var(--muted);font-size:13px;margin:16px 0 24px;padding-bottom:18px;border-bottom:1px solid var(--line)}
    .player-wrap{background:#0b1220;border-radius:12px;overflow:hidden;min-height:330px;display:flex;align-items:center;justify-content:center}
    .player-wrap>*{max-width:100%}
    .video-cover{width:100%;max-height:540px;object-fit:cover;display:block}
    .video-body{margin-top:26px;min-width:0;max-width:100%;overflow-x:auto;color:#40516b}
    .video-body img,.video-body table{max-width:100%}
    .video-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:25px}
    .video-tags a{padding:5px 11px;background:#eef4ff;border-radius:20px;color:var(--blue);font-size:12px}
    .video-side{padding:22px}
    .video-side h2{font-size:18px;margin:0 0 14px}
    .side-video{display:grid;grid-template-columns:92px 1fr;gap:10px;padding:12px 0;border-top:1px solid var(--line)}
    .side-video img{width:92px;height:58px;border-radius:7px;object-fit:cover;background:#e8eef8}
    .side-video strong{font-size:13px;line-height:1.4;display:block}
    .side-video small{display:block;color:var(--muted);font-size:11px;margin-top:4px}
    .more-video{display:inline-block;margin-top:15px;padding:9px 14px;border-radius:7px;background:var(--blue);color:#fff;font-size:13px}
    @media(max-width:980px){
      .main-nav{display:none}.hamburger{display:block}.header-inner{height:68px}.nav-list{display:none}
      .video-layout{grid-template-columns:1fr}.video-side{display:block}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:7px 0;display:block;font-size:11px}.topbar a{margin-left:12px}
      .logo{min-width:0;font-size:17px}.logo img{width:32px;height:32px}.member-btn{display:none}.open-btn{padding:7px 11px}
      .video-detail-main{padding-top:25px}.video-content-card{padding:18px}.video-title{font-size:26px}
      .player-wrap{min-height:210px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-brand{grid-column:1/-1}
    }