:root{
      --brand:#0B3D91;
      --theme-source:{主题色};
      --brand-dark:#072B68;
      --brand-soft:#EAF1FC;
      --ink:#172033;
      --muted:#667085;
      --line:#DDE4EE;
      --surface:#FFFFFF;
      --page:#F4F7FB;
      --accent:#E49A35;
      --success:#16866A;
      --shadow:0 14px 34px rgba(27,45,77,.10);
      --radius:8px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--page);
      font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;
      line-height:1.6;
    }
    body,button,input{font-size:15px}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{font-family:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#DCE7F8;
      background:var(--brand-dark);
      font-size:13px;
    }
    .topbar .container{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar .container>span:last-child{display:flex;gap:20px}
    .topbar a:hover{color:#FFFFFF}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 4px 18px rgba(25,45,75,.05);
    }
    .header-inner{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      min-width:180px;
      max-width:250px;
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--brand);
      font-size:19px;
      font-weight:800;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
    }
    .logo span{
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .main-nav{margin-left:auto;align-self:stretch}
    .nav-list{
      height:100%;
      display:flex;
      align-items:stretch;
      gap:2px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }
    .nav-link{
      height:100%;
      display:flex;
      align-items:center;
      padding:0 12px;
      color:#344054;
      font-weight:600;
      white-space:nowrap;
      border-bottom:3px solid transparent;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link{
      color:var(--brand);
      border-bottom-color:var(--brand);
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin:0 0 4px 8px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg);
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:0;
      z-index:60;
      visibility:hidden;
      opacity:0;
      transform:translateY(8px);
      pointer-events:none;
      transition:opacity .18s ease,transform .18s ease,visibility .18s;
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:0 0 var(--radius) var(--radius);
      box-shadow:var(--shadow);
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:8px;
    }
    .nav-item:hover>.dropdown-panel,
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.dropdown-panel,
    .nav-item:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      transform:translateY(0);
      pointer-events:auto;
    }
    .dropdown-panel{
      width:280px;
      padding:10px;
    }
    .dropdown-panel a{
      display:block;
      padding:10px 12px;
      color:#344054;
      border-radius:6px;
    }
    .dropdown-panel a:hover{
      color:var(--brand);
      background:var(--brand-soft);
    }
    .dropdown-panel a:last-child{
      margin-top:6px;
      color:var(--brand);
      font-weight:700;
      border-top:1px solid var(--line);
      border-radius:0;
    }
    .mega-menu{
      left:50%;
      width:min(780px,80vw);
      padding:20px;
      transform:translate(-50%,8px);
    }
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{transform:translate(-50%,0)}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }
    .mega-card{
      min-width:0;
      display:grid;
      grid-template-columns:48px minmax(0,1fr);
      align-content:center;
      column-gap:10px;
      padding:12px;
      background:#F8FAFD;
      border:1px solid #E7ECF3;
      border-radius:var(--radius);
    }
    .mega-card:hover{
      border-color:#A9BDE0;
      background:var(--brand-soft);
    }
    .mega-card img{
      grid-row:1/4;
      width:48px;
      height:48px;
      object-fit:cover;
      align-self:start;
      border-radius:6px;
      background:#FFFFFF;
    }
    .mega-card strong,
    .mega-card small{
      min-width:0;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .mega-card strong{
      color:#1F2A44;
      white-space:nowrap;
    }
    .mega-card small{
      color:var(--muted);
      font-size:12px;
      line-height:1.45;
    }
    .mega-card:not(:has(img)){
      display:block;
      min-height:68px;
    }
    .mega-card:not(:has(img)) strong,
    .mega-card:not(:has(img)) small{display:block}
    .mega-footer{
      display:block;
      margin-top:14px;
      padding:10px 12px;
      color:var(--brand);
      background:var(--brand-soft);
      text-align:center;
      font-weight:700;
      border-radius:6px;
    }
    .header-btns{
      display:flex;
      align-items:center;
      gap:9px;
    }
    .member-link{
      color:var(--brand);
      font-weight:700;
      white-space:nowrap;
    }
    .open-account{
      padding:9px 16px;
      color:#FFFFFF;
      background:var(--brand);
      border-radius:6px;
      font-weight:700;
      white-space:nowrap;
    }
    .open-account:hover{background:var(--brand-dark)}
    .hamburger{
      width:42px;
      height:42px;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      padding:0;
      background:#FFFFFF;
      border:1px solid var(--line);
      border-radius:6px;
      cursor:pointer;
    }
    .hamburger span{
      width:20px;
      height:2px;
      background:var(--ink);
      transition:transform .2s ease,opacity .2s ease;
    }
    .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{
      position:fixed;
      inset:0;
      z-index:80;
      visibility:hidden;
      opacity:0;
      background:rgba(9,19,36,.56);
      transition:opacity .2s ease,visibility .2s;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:90;
      width:min(390px,90vw);
      overflow-y:auto;
      background:#FFFFFF;
      box-shadow:-18px 0 45px rgba(15,30,55,.2);
      transform:translateX(105%);
      transition:transform .25s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      display:flex;
      align-items:center;
      gap:12px;
      padding:14px 18px;
      color:var(--brand);
      border-bottom:1px solid var(--line);
      font-weight:700;
    }
    .drawer-head>a{margin-left:auto}
    .drawer-close{
      width:38px;
      height:38px;
      padding:0;
      color:#344054;
      background:#F4F6F9;
      border:0;
      border-radius:6px;
      font-size:25px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:12px 18px 28px}
    .drawer-link,
    .drawer-toggle{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:13px 4px;
      color:#28364D;
      background:transparent;
      border:0;
      border-bottom:1px solid #EDF0F4;
      font-weight:700;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      color:var(--brand);
      font-size:20px;
      font-weight:400;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:7px 0 9px 14px;
      border-bottom:1px solid #EDF0F4;
    }
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;
      padding:8px 6px;
      color:var(--muted);
    }
    .drawer-submenu a:hover{color:var(--brand)}

    .video-page{min-height:640px}
    .video-page .video-heading{
      padding:58px 0 44px;
      color:#FFFFFF;
      background:
        linear-gradient(115deg,rgba(7,43,104,.96),rgba(11,61,145,.88)),
        var(--brand);
    }
    .video-page .heading-inner{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:40px;
    }
    .video-page .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:12px;
      color:#C9D8F0;
      font-size:14px;
    }
    .video-page .breadcrumb a:hover{color:#FFFFFF}
    .video-page h1{
      margin:0;
      font-size:clamp(30px,4vw,46px);
      line-height:1.2;
      letter-spacing:0;
    }
    .video-page .heading-copy{
      max-width:680px;
      margin:14px 0 0;
      color:#DDE7F7;
      font-size:16px;
    }
    .video-page .heading-mark{
      flex:0 0 auto;
      padding:9px 14px;
      color:#FFFFFF;
      border:1px solid rgba(255,255,255,.28);
      border-radius:6px;
      font-size:14px;
    }
    .video-page .category-band{
      background:#FFFFFF;
      border-bottom:1px solid var(--line);
    }
    .video-page .category-list{
      display:flex;
      align-items:center;
      gap:8px;
      overflow-x:auto;
      padding:15px 0;
      scrollbar-width:thin;
    }
    .video-page .category-list>a{
      flex:0 0 auto;
      padding:8px 13px;
      color:#3A485E;
      background:#F2F5F9;
      border:1px solid #E2E7EF;
      border-radius:6px;
      font-weight:600;
    }
    .video-page .category-list>a:hover{
      color:#FFFFFF;
      background:var(--brand);
      border-color:var(--brand);
    }
    .video-page .video-content{padding:44px 0 64px}
    .video-page .section-bar{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:22px;
    }
    .video-page .section-bar h2{
      margin:0;
      font-size:26px;
      letter-spacing:0;
    }
    .video-page .section-bar p{
      margin:0;
      color:var(--muted);
    }
    .video-page .video-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:22px;
    }
    .video-page .video-card{
      min-width:0;
      overflow:hidden;
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 8px 22px rgba(29,47,77,.07);
      transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
    }
    .video-page .video-card:hover{
      transform:translateY(-4px);
      border-color:#AFC0DC;
      box-shadow:var(--shadow);
    }
    .video-page .video-cover{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
      background:#DDE5F0;
    }
    .video-page .video-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .3s ease;
    }
    .video-page .video-card:hover .video-cover img{transform:scale(1.035)}
    .video-page .play-indicator{
      position:absolute;
      top:50%;
      left:50%;
      width:52px;
      height:52px;
      display:grid;
      place-items:center;
      color:#FFFFFF;
      background:rgba(11,61,145,.9);
      border:2px solid rgba(255,255,255,.78);
      border-radius:50%;
      transform:translate(-50%,-50%);
      box-shadow:0 8px 20px rgba(0,0,0,.2);
    }
    .video-page .play-indicator::before{
      content:"";
      width:0;
      height:0;
      margin-left:4px;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      border-left:13px solid #FFFFFF;
    }
    .video-page .duration{
      position:absolute;
      right:10px;
      bottom:10px;
      padding:3px 8px;
      color:#FFFFFF;
      background:rgba(13,19,31,.82);
      border-radius:4px;
      font-size:12px;
    }
    .video-page .video-body{padding:18px}
    .video-page .video-kicker{
      display:flex;
      align-items:center;
      gap:7px;
      margin-bottom:8px;
      color:var(--brand);
      font-size:13px;
      font-weight:700;
    }
    .video-page .video-kicker::before{
      content:"";
      width:7px;
      height:7px;
      background:var(--accent);
      border-radius:50%;
    }
    .video-page .video-card h3{
      min-height:52px;
      margin:0;
      color:#1B2940;
      font-size:18px;
      line-height:1.45;
      letter-spacing:0;
    }
    .video-page .video-card h3 a:hover{color:var(--brand)}
    .video-page .video-summary{
      min-height:48px;
      margin:10px 0 16px;
      overflow:hidden;
      color:var(--muted);
      display:-webkit-box;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-page .watch-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--brand);
      font-weight:700;
    }
    .video-page .watch-link::after{
      content:"›";
      font-size:21px;
      line-height:1;
    }
    .video-page .watch-link:hover{color:var(--brand-dark)}
    .video-page .pagination{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:8px;
      margin-top:42px;
    }
    .video-page .pagination a{
      min-width:42px;
      min-height:42px;
      display:grid;
      place-items:center;
      padding:7px 12px;
      color:#3D4A5F;
      background:#FFFFFF;
      border:1px solid var(--line);
      border-radius:6px;
      font-weight:700;
    }
    .video-page .pagination a:hover,
    .video-page .pagination a.active,
    .video-page .pagination a.current{
      color:#FFFFFF;
      background:var(--brand);
      border-color:var(--brand);
    }
    .video-page .video-note{
      margin-top:42px;
      padding:22px 24px;
      color:#344054;
      background:#EAF1FC;
      border-left:4px solid var(--brand);
      border-radius:0 var(--radius) var(--radius) 0;
    }
    .video-page .video-note strong{
      display:block;
      margin-bottom:4px;
      color:var(--brand-dark);
      font-size:17px;
    }
    .video-page .video-note p{margin:0}

    .footer{
      color:#D2DBE9;
      background:#101C30;
    }
    .footer .container{padding-top:52px}
    .footer-grid{
      display:grid;
      grid-template-columns:1.5fr 1fr 1fr 1.1fr;
      gap:42px;
      padding-bottom:42px;
    }
    .footer h3{
      margin:0 0 15px;
      color:#FFFFFF;
      font-size:16px;
      letter-spacing:0;
    }
    .footer strong{
      display:block;
      margin-bottom:13px;
      color:#FFFFFF;
      font-size:21px;
    }
    .footer p{margin:7px 0;color:#AAB8CB}
    .footer-grid>div>a{
      display:block;
      width:max-content;
      max-width:100%;
      margin:8px 0;
      color:#C4CFDE;
    }
    .footer-grid>div>a:hover{color:#FFFFFF}
    .footer-bottom{
      min-height:66px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
      color:#97A7BB;
      border-top:1px solid rgba(255,255,255,.1);
      font-size:13px;
    }

    @media (max-width:1100px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-btns{margin-left:auto}
      .video-page .video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:720px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{
        padding:7px 0;
        align-items:flex-start;
        flex-direction:column;
        gap:2px;
      }
      .topbar .container>span:last-child{
        width:100%;
        flex-wrap:wrap;
        gap:2px 14px;
      }
      .header-inner{min-height:68px;gap:10px}
      .logo{min-width:0;max-width:180px;font-size:16px}
      .logo img{width:36px;height:36px}
      .member-link{display:none}
      .open-account{padding:8px 11px}
      .video-page .video-heading{padding:38px 0 34px}
      .video-page .heading-inner{display:block}
      .video-page .heading-mark{
        display:inline-block;
        margin-top:20px;
      }
      .video-page h1{font-size:32px}
      .video-page .video-content{padding:34px 0 48px}
      .video-page .section-bar{
        display:block;
        margin-bottom:18px;
      }
      .video-page .section-bar p{margin-top:5px}
      .video-page .video-grid{grid-template-columns:1fr}
      .video-page .video-card h3{min-height:0}
      .video-page .video-summary{min-height:0}
      .footer .container{padding-top:40px}
      .footer-grid{
        grid-template-columns:1fr;
        gap:26px;
      }
      .footer-bottom{
        align-items:flex-start;
        flex-direction:column;
        padding:18px 0;
        gap:6px;
      }
    }
    @media (max-width:430px){
      .logo span{
        max-width:112px;
        overflow:hidden;
        text-overflow:ellipsis;
      }
      .header-btns{gap:6px}
      .open-account{font-size:14px}
      .hamburger{width:39px;height:39px}
    }