:root{
      --brand:#0B3D91;
      --brand-dark:#06265f;
      --brand-light:#eaf2ff;
      --template-theme:{主题色};
      --electric:#2487ff;
      --green:#70f5a2;
      --ink:#0b1427;
      --muted:#667085;
      --line:#dce5f2;
      --surface:#f4f7fb;
      --white:#fff;
      --shadow:0 16px 42px rgba(11,61,145,.12);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--surface);
      font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;
      line-height:1.65;
      -webkit-font-smoothing:antialiased;
    }
    body.drawer-lock{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{color:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      position:relative;
      z-index:1002;
      color:#dbe9ff;
      background:#06162f;
      font-size:13px;
    }
    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar-contact{display:flex;align-items:center;gap:20px}
    .topbar-contact a{transition:color .2s ease}
    .topbar-contact a:hover{color:var(--green)}

    .header{
      position:relative;
      z-index:1000;
      background:rgba(255,255,255,.97);
      border-bottom:1px solid rgba(11,61,145,.1);
      box-shadow:0 6px 20px rgba(8,31,70,.04);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:22px;
    }
    .logo,.footer-logo{
      display:inline-flex;
      align-items:center;
      gap:10px;
      color:var(--brand-dark);
      font-weight:800;
      letter-spacing:.01em;
    }
    .logo{flex:0 0 auto;font-size:18px}
    .logo img,.footer-logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .main-nav{align-self:stretch;display:flex;align-items:stretch;margin-left:auto}
    .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:stretch;
    }
    .nav-link{
      position:relative;
      display:flex;
      align-items:center;
      padding:0 12px;
      color:#263550;
      font-size:15px;
      font-weight:600;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .nav-link:hover,.nav-item:focus-within>.nav-link{
      color:var(--brand);
      background:var(--brand-light);
    }
    .nav-link.has-arrow::after{
      width:6px;
      height:6px;
      margin-left:7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      content:"";
      transform:rotate(45deg) translateY(-2px);
      transition:transform .2s ease;
    }
    .nav-item:hover>.nav-link.has-arrow::after,
    .nav-item:focus-within>.nav-link.has-arrow::after{
      transform:rotate(225deg) translate(-1px,-1px);
    }
    .dropdown-panel,.mega-menu{
      position:absolute;
      top:100%;
      left:0;
      visibility:hidden;
      opacity:0;
      transform:translateY(8px);
      pointer-events:none;
      transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
      border:1px solid var(--line);
      background:var(--white);
      box-shadow:0 22px 55px rgba(8,31,70,.16);
    }
    .dropdown-panel::before,.mega-menu::before{
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:12px;
      content:"";
    }
    .nav-item:hover>.dropdown-panel,
    .nav-item:focus-within>.dropdown-panel,
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      transform:translateY(0);
      pointer-events:auto;
    }
    .dropdown-panel{
      width:310px;
      padding:18px;
      border-radius:0 0 16px 16px;
    }
    .dropdown-title{
      margin-bottom:10px;
      color:var(--brand);
      font-size:13px;
      font-weight:800;
    }
    .dropdown-panel>a:not(.dropdown-more){
      display:block;
      padding:9px 8px;
      overflow:hidden;
      border-radius:8px;
      color:#34435e;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .dropdown-panel>a:not(.dropdown-more):hover{color:var(--brand);background:var(--brand-light)}
    .dropdown-more,.mega-footer{
      display:flex;
      align-items:center;
      justify-content:center;
      margin-top:12px;
      padding:10px 14px;
      color:#fff;
      background:var(--brand);
      border-radius:9px;
      font-size:14px;
      font-weight:700;
    }
    .mega-menu{
      left:50%;
      width:620px;
      padding:20px;
      border-radius:0 0 18px 18px;
      transform:translate(-50%,8px);
    }
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{transform:translate(-50%,0)}
    .mega-menu.mega-wide{
      width:min(880px,calc(100vw - 40px));
    }
    .nav-item:nth-last-child(-n+3) .mega-menu{
      right:0;
      left:auto;
      transform:translateY(8px);
    }
    .nav-item:nth-last-child(-n+3):hover>.mega-menu,
    .nav-item:nth-last-child(-n+3):focus-within>.mega-menu{
      transform:translateY(0);
    }
    .mega-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:20px;
      padding-bottom:14px;
      border-bottom:1px solid var(--line);
    }
    .mega-head strong{color:var(--brand-dark);font-size:18px}
    .mega-head span{color:var(--muted);font-size:13px;text-align:right}
    .mega-categories{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      padding:14px 0 2px;
    }
    .mega-categories a{
      padding:6px 11px;
      color:var(--brand);
      background:var(--brand-light);
      border-radius:999px;
      font-size:12px;
      font-weight:700;
    }
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:10px;
      margin-top:14px;
    }
    .mega-card{
      min-width:0;
      display:flex;
      align-items:center;
      gap:10px;
      padding:11px;
      border:1px solid var(--line);
      border-radius:12px;
      transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
    }
    .mega-card:hover{
      border-color:rgba(36,135,255,.6);
      box-shadow:0 10px 24px rgba(11,61,145,.1);
      transform:translateY(-2px);
    }
    .mega-card>img{
      width:46px;
      height:46px;
      flex:0 0 46px;
      object-fit:contain;
      border-radius:9px;
      background:#f1f5fb;
    }
    .mega-video-card>img{object-fit:cover}
    .mega-copy{min-width:0;display:flex;flex-direction:column}
    .mega-copy strong,.mega-copy small{
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-copy strong{color:#1a2943;font-size:13px}
    .mega-copy small{color:var(--muted);font-size:11px}
    .header-btns{
      display:flex;
      align-items:center;
      gap:10px;
      flex:0 0 auto;
    }
    .member-entry{font-size:14px}
    .account-btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:42px;
      padding:0 17px;
      color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--electric));
      border-radius:10px;
      box-shadow:0 8px 20px rgba(11,61,145,.2);
      font-size:14px;
      font-weight:700;
    }
    .hamburger{
      width:44px;
      height:42px;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      padding:0;
      border:1px solid var(--line);
      background:#fff;
      border-radius:10px;
      cursor:pointer;
    }
    .hamburger span{
      width:20px;
      height:2px;
      background:var(--brand-dark);
      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:1090;
      visibility:hidden;
      opacity:0;
      background:rgba(3,13,31,.62);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      z-index:1100;
      top:0;
      right:0;
      width:min(390px,90vw);
      height:100dvh;
      overflow-y:auto;
      background:#fff;
      box-shadow:-18px 0 50px rgba(4,24,58,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:70px;
      display:flex;
      align-items:center;
      gap:12px;
      padding:14px 18px;
      color:#fff;
      background:linear-gradient(135deg,var(--brand-dark),var(--brand));
    }
    .drawer-head>a{
      padding:7px 12px;
      border:1px solid rgba(255,255,255,.35);
      border-radius:8px;
      font-size:13px;
    }
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      padding:0;
      border:0;
      color:#fff;
      background:rgba(255,255,255,.12);
      border-radius:50%;
      font-size:27px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:12px 18px 28px}
    .drawer-link,.drawer-toggle{
      width:100%;
      min-height:50px;
      display:flex;
      align-items:center;
      padding:0 4px;
      border:0;
      border-bottom:1px solid var(--line);
      background:transparent;
      color:#1c2d49;
      font-weight:700;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle::after{
      width:8px;
      height:8px;
      margin-left:auto;
      border-right:2px solid var(--brand);
      border-bottom:2px solid var(--brand);
      content:"";
      transform:rotate(45deg);
      transition:transform .2s ease;
    }
    .drawer-toggle.active::after{transform:rotate(225deg)}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      padding:0 10px;
      background:#f6f9fd;
      transition:max-height .3s ease,padding .3s ease;
    }
    .drawer-submenu.open{
      max-height:700px;
      padding:8px 10px;
    }
    .drawer-submenu a{
      display:block;
      padding:9px 8px;
      color:#53627a;
      border-bottom:1px dashed #d9e2ef;
      font-size:13px;
    }

    .video-page{min-width:0}
    .video-page .video-hero{
      position:relative;
      overflow:hidden;
      padding:72px 0 62px;
      color:#fff;
      background:
        radial-gradient(circle at 15% 20%,rgba(36,135,255,.38),transparent 28%),
        radial-gradient(circle at 85% 72%,rgba(112,245,162,.15),transparent 24%),
        linear-gradient(145deg,#050f24,#08255b 56%,#0b3d91);
    }
    .video-page .video-hero::before{
      position:absolute;
      inset:0;
      opacity:.2;
      background-image:
        linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);
      background-size:46px 46px;
      content:"";
      mask-image:linear-gradient(to bottom,#000,transparent);
    }
    .video-page .video-hero-inner{position:relative;z-index:1;text-align:center}
    .video-page .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:16px;
      padding:7px 13px;
      border:1px solid rgba(112,245,162,.45);
      color:var(--green);
      background:rgba(8,29,65,.55);
      border-radius:999px;
      font-size:13px;
      font-weight:800;
    }
    .video-page .eyebrow::before{
      width:8px;
      height:8px;
      background:var(--green);
      border-radius:50%;
      box-shadow:0 0 14px var(--green);
      content:"";
    }
    .video-page .video-hero h1{
      max-width:820px;
      margin:0 auto 14px;
      font-size:clamp(34px,5vw,58px);
      line-height:1.14;
      letter-spacing:-.035em;
    }
    .video-page .video-hero p{
      max-width:720px;
      margin:0 auto;
      color:#c7d7f3;
      font-size:17px;
    }
    .video-page .hero-metrics{
      max-width:760px;
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin:34px auto 0;
    }
    .video-page .metric{
      padding:16px;
      border:1px solid rgba(255,255,255,.13);
      background:rgba(3,18,46,.48);
      border-radius:14px;
      backdrop-filter:blur(10px);
    }
    .video-page .metric strong{display:block;color:#fff;font-size:20px}
    .video-page .metric span{color:#aebfdd;font-size:12px}

    .video-page .category-strip{
      position:relative;
      z-index:2;
      margin-top:-23px;
    }
    .video-page .category-panel{
      display:flex;
      align-items:center;
      gap:10px;
      padding:15px;
      overflow-x:auto;
      border:1px solid var(--line);
      background:#fff;
      border-radius:15px;
      box-shadow:var(--shadow);
      scrollbar-width:thin;
    }
    .video-page .category-label{
      flex:0 0 auto;
      padding:8px 12px;
      color:var(--brand-dark);
      font-weight:800;
    }
    .video-page .category-panel a{
      flex:0 0 auto;
      padding:9px 14px;
      color:#43526b;
      background:#f2f6fc;
      border:1px solid transparent;
      border-radius:999px;
      font-size:13px;
      font-weight:700;
      transition:.2s ease;
    }
    .video-page .category-panel a:hover{
      color:#fff;
      background:var(--brand);
      border-color:var(--brand);
    }

    .video-page .video-content{padding:58px 0 76px}
    .video-page .section-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:25px;
    }
    .video-page .section-head h2{
      margin:0 0 5px;
      color:var(--brand-dark);
      font-size:30px;
      line-height:1.25;
    }
    .video-page .section-head p{margin:0;color:var(--muted)}
    .video-page .section-badge{
      flex:0 0 auto;
      padding:8px 13px;
      color:var(--brand);
      background:var(--brand-light);
      border-radius:999px;
      font-size:13px;
      font-weight:800;
    }
    .video-page .video-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:24px;
    }
    .video-page .video-card{
      min-width:0;
      overflow:hidden;
      border:1px solid var(--line);
      background:#fff;
      border-radius:var(--radius);
      box-shadow:0 8px 24px rgba(17,42,82,.06);
      transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
    }
    .video-page .video-card:hover{
      border-color:rgba(36,135,255,.42);
      box-shadow:0 20px 44px rgba(11,61,145,.14);
      transform:translateY(-6px);
    }
    .video-page .video-cover{
      position:relative;
      display:block;
      aspect-ratio:16/9;
      overflow:hidden;
      background:#071a3c;
    }
    .video-page .video-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .4s ease,opacity .3s ease;
    }
    .video-page .video-card:hover .video-cover img{opacity:.8;transform:scale(1.045)}
    .video-page .play-button{
      position:absolute;
      top:50%;
      left:50%;
      width:58px;
      height:58px;
      display:grid;
      place-items:center;
      color:#fff;
      background:rgba(11,61,145,.88);
      border:1px solid rgba(255,255,255,.65);
      border-radius:50%;
      box-shadow:0 10px 25px rgba(0,0,0,.28);
      transform:translate(-50%,-50%);
      transition:background .2s ease,transform .2s ease;
    }
    .video-page .play-button::after{
      margin-left:4px;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      border-left:13px solid #fff;
      content:"";
    }
    .video-page .video-card:hover .play-button{
      color:#06265f;
      background:var(--green);
      transform:translate(-50%,-50%) scale(1.08);
    }
    .video-page .duration{
      position:absolute;
      right:10px;
      bottom:10px;
      padding:4px 8px;
      color:#fff;
      background:rgba(3,12,28,.82);
      border-radius:6px;
      font-size:12px;
      font-weight:700;
    }
    .video-page .video-card-body{padding:19px}
    .video-page .video-category{
      display:inline-flex;
      margin-bottom:9px;
      color:var(--electric);
      font-size:12px;
      font-weight:800;
    }
    .video-page .video-card h3{
      min-height:52px;
      margin:0 0 9px;
      color:#172844;
      font-size:18px;
      line-height:1.45;
    }
    .video-page .video-card h3 a:hover{color:var(--brand)}
    .video-page .video-summary{
      min-height:66px;
      display:-webkit-box;
      overflow:hidden;
      margin:0 0 15px;
      color:var(--muted);
      font-size:14px;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:3;
    }
    .video-page .video-card-foot{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding-top:13px;
      border-top:1px solid #edf1f7;
      color:#7b879b;
      font-size:12px;
    }
    .video-page .watch-link{
      color:var(--brand);
      font-weight:800;
    }
    .video-page .watch-link::after{margin-left:5px;content:"→"}
    .video-page .pagination{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      justify-content:center;
      gap:8px;
      margin-top:42px;
    }
    .video-page .pagination a{
      min-width:42px;
      height:42px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 13px;
      border:1px solid var(--line);
      color:#3c4b64;
      background:#fff;
      border-radius:10px;
      font-size:14px;
      font-weight:700;
      transition:.2s ease;
    }
    .video-page .pagination a:hover,
    .video-page .pagination a.active,
    .video-page .pagination a.current{
      color:#fff;
      background:var(--brand);
      border-color:var(--brand);
      box-shadow:0 8px 18px rgba(11,61,145,.2);
    }
    .video-page .learning-note{
      display:grid;
      grid-template-columns:1fr auto;
      align-items:center;
      gap:30px;
      margin-top:58px;
      padding:34px;
      color:#fff;
      background:linear-gradient(135deg,#061a40,#0b3d91);
      border-radius:22px;
      box-shadow:var(--shadow);
    }
    .video-page .learning-note h2{margin:0 0 8px;font-size:25px}
    .video-page .learning-note p{max-width:720px;margin:0;color:#bfd0eb}
    .video-page .learning-note a{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:48px;
      padding:0 20px;
      color:#06265f;
      background:var(--green);
      border-radius:11px;
      font-weight:800;
      white-space:nowrap;
    }

    .footer{
      color:#bbc8db;
      background:#061329;
    }
    .footer-main{
      display:grid;
      grid-template-columns:1.55fr 1fr 1fr 1fr;
      gap:42px;
      padding:58px 0 42px;
    }
    .footer-logo{color:#fff;font-size:19px}
    .footer-brand p{max-width:410px;margin:18px 0;color:#9fb0c8;font-size:14px}
    .footer-social{color:#fff}
    .footer h3{
      margin:4px 0 18px;
      color:#fff;
      font-size:16px;
    }
    .footer-links,.footer-contact{display:flex;flex-direction:column;gap:10px}
    .footer-links a,.footer-contact a{
      color:#aebdd1;
      font-size:14px;
      transition:color .2s ease,transform .2s ease;
    }
    .footer-links a:hover,.footer-contact a:hover{
      color:var(--green);
      transform:translateX(3px);
    }
    .footer-contact span{color:#71849f;font-size:12px}
    .footer-bottom{
      min-height:66px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      border-top:1px solid rgba(255,255,255,.1);
      color:#8192aa;
      font-size:13px;
    }

    @media (max-width:1180px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-btns{margin-left:auto}
      .mega-menu,.dropdown-panel{display:none}
    }
    @media (max-width:900px){
      .video-page .video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-main{grid-template-columns:repeat(2,1fr)}
      .video-page .learning-note{grid-template-columns:1fr}
      .video-page .learning-note a{justify-self:start}
    }
    @media (max-width:680px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-welcome{display:none}
      .topbar-inner{justify-content:center}
      .topbar-contact{width:100%;justify-content:space-between;gap:10px;font-size:12px}
      .header-inner{min-height:68px}
      .logo span{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
      .logo img{width:38px;height:38px}
      .member-entry,.account-btn{display:none}
      .video-page .video-hero{padding:55px 0 50px}
      .video-page .video-hero p{font-size:15px}
      .video-page .hero-metrics{grid-template-columns:1fr;gap:8px;margin-top:25px}
      .video-page .metric{padding:11px}
      .video-page .metric strong{font-size:17px}
      .video-page .category-strip{margin-top:-17px}
      .video-page .category-panel{padding:10px}
      .video-page .video-content{padding:43px 0 60px}
      .video-page .section-head{align-items:flex-start;flex-direction:column;gap:10px}
      .video-page .section-head h2{font-size:25px}
      .video-page .video-grid{grid-template-columns:1fr;gap:17px}
      .video-page .video-card h3,.video-page .video-summary{min-height:0}
      .video-page .learning-note{margin-top:42px;padding:25px}
      .footer-main{grid-template-columns:1fr;gap:28px;padding:45px 0 34px}
      .footer-bottom{align-items:flex-start;flex-direction:column;justify-content:center;padding:18px 0}
    }