:root{
      --theme:#0B3D91;
      --template-theme:{主题色};
      --theme-dark:#062861;
      --theme-soft:#eaf2ff;
      --ink:#10203a;
      --muted:#64748b;
      --line:#dbe4f0;
      --surface:#ffffff;
      --page:#f4f7fb;
      --success:#0f9f6e;
      --radius:18px;
      --shadow:0 18px 45px rgba(15,35,70,.10);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--page);
      font-family:"Noto Sans Devanagari","Mangal","Arial",sans-serif;
      line-height:1.65;
    }
    body.drawer-locked{overflow:hidden}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dceaff;
      background:#06152e;
      border-bottom:1px solid rgba(255,255,255,.09);
      font-size:13px;
    }
    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar-welcome strong{color:#fff}
    .topbar-contact{display:flex;align-items:center;gap:20px}
    .topbar-contact a{transition:.2s ease}
    .topbar-contact a:hover{color:#fff}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.97);
      border-bottom:1px solid var(--line);
      box-shadow:0 6px 24px rgba(18,45,82,.05);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      min-width:0;
      display:inline-flex;
      align-items:center;
      gap:11px;
      color:var(--theme-dark);
      font-weight:800;
      letter-spacing:-.02em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .logo span{
      max-width:190px;
      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:#243650;
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
      transition:.2s ease;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link,
    .nav-item:hover>.nav-link{color:var(--theme)}
    .has-panel>.nav-link::after{
      content:"";
      width:6px;
      height:6px;
      margin-left:7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg) translateY(-2px);
    }
    .has-panel::after{
      content:"";
      position:absolute;
      top:100%;
      left:0;
      width:100%;
      height:12px;
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:50%;
      visibility:hidden;
      opacity:0;
      transform:translate(-50%,10px);
      pointer-events:none;
      transition:opacity .18s ease,transform .18s ease,visibility .18s;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 18px 18px;
      box-shadow:0 24px 60px rgba(14,35,68,.16);
    }
    .dropdown-panel{width:380px;padding:20px}
    .mega-menu{
      width:min(900px,calc(100vw - 48px));
      padding:22px;
    }
    .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:translate(-50%,0);
      pointer-events:auto;
    }
    .panel-head,.mega-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      margin-bottom:15px;
      padding-bottom:12px;
      border-bottom:1px solid var(--line);
    }
    .panel-head strong,.mega-head strong{font-size:16px}
    .panel-head a,.mega-head a{color:var(--theme);font-size:13px;font-weight:800}
    .dropdown-articles{display:grid;gap:8px}
    .dropdown-article{
      padding:10px 12px;
      border-radius:10px;
      background:#f7f9fc;
      font-size:14px;
    }
    .dropdown-article:hover{color:var(--theme);background:var(--theme-soft)}
    .mega-categories{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:16px;
    }
    .mega-categories a{
      padding:7px 11px;
      color:#36516f;
      background:#f2f6fb;
      border:1px solid #e2e9f2;
      border-radius:999px;
      font-size:12px;
      font-weight:700;
    }
    .mega-categories a:hover{color:#fff;background:var(--theme);border-color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .mega-card{
      min-width:0;
      display:flex;
      align-items:flex-start;
      gap:11px;
      padding:12px;
      border:1px solid #e4eaf2;
      border-radius:13px;
      background:#fff;
      transition:.2s ease;
    }
    .mega-card:hover{
      border-color:#a9c5ee;
      transform:translateY(-2px);
      box-shadow:0 10px 24px rgba(11,61,145,.09);
    }
    .mega-card>span{min-width:0}
    .mega-card img{
      flex:0 0 auto;
      width:48px;
      height:48px;
      object-fit:cover;
      border-radius:10px;
      background:#edf3fb;
    }
    .video-mini img,.product-mini img{width:68px;height:54px}
    .mega-card strong{
      display:block;
      overflow:hidden;
      color:#172c47;
      font-size:13px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card p{
      display:-webkit-box;
      overflow:hidden;
      margin:4px 0 0;
      color:var(--muted);
      font-size:11px;
      line-height:1.45;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .mini-meta{
      display:flex;
      flex-wrap:wrap;
      gap:4px 8px;
      margin-top:5px;
      color:#6d7d91;
      font-size:10px;
    }
    .mini-meta b{color:var(--success)}
    .header-btns{display:flex;align-items:center;gap:9px}
    .header-btns>a{
      padding:9px 14px;
      color:#fff;
      background:var(--theme);
      border-radius:10px;
      font-size:13px;
      font-weight:800;
      white-space:nowrap;
    }
    .hamburger{
      display:none;
      width:42px;
      height:42px;
      padding:9px;
      border:1px solid var(--line);
      border-radius:10px;
      background:#fff;
      cursor:pointer;
    }
    .hamburger span{
      display:block;
      width:100%;
      height:2px;
      margin:5px 0;
      background:var(--ink);
      transition:.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;
      z-index:98;
      inset:0;
      visibility:hidden;
      opacity:0;
      background:rgba(3,13,30,.62);
      transition:.25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      z-index:99;
      top:0;
      right:0;
      width:min(390px,92vw);
      height:100%;
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 55px rgba(4,20,48,.24);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      position:sticky;
      z-index:2;
      top:0;
      display:flex;
      align-items:center;
      gap:10px;
      min-height:70px;
      padding:14px 18px;
      background:#fff;
      border-bottom:1px solid var(--line);
    }
    .drawer-head>a{
      padding:8px 11px;
      color:#fff;
      background:var(--theme);
      border-radius:9px;
      font-size:13px;
      font-weight:800;
    }
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      color:#263a55;
      background:#f1f5f9;
      border:0;
      border-radius:10px;
      font-size:25px;
      cursor:pointer;
    }
    .drawer-menu{padding:14px 18px 28px}
    .drawer-link,.drawer-toggle{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:14px 6px;
      color:#172c47;
      background:none;
      border:0;
      border-bottom:1px solid #e8edf4;
      text-align:left;
      font-weight:800;
      cursor:pointer;
    }
    .drawer-toggle::after{content:"+";font-size:19px}
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:7px 0 10px 15px;
      border-bottom:1px solid #e8edf4;
    }
    .drawer-submenu.open{display:grid}
    .drawer-submenu a{
      padding:9px 10px;
      color:#52657d;
      border-radius:8px;
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--theme);background:var(--theme-soft)}

    .video-page .video-hero{
      position:relative;
      overflow:hidden;
      padding:78px 0 68px;
      color:#fff;
      background:
        radial-gradient(circle at 12% 20%,rgba(104,169,255,.30),transparent 30%),
        radial-gradient(circle at 88% 70%,rgba(118,73,235,.24),transparent 34%),
        linear-gradient(135deg,#06162f,#0B3D91 58%,#071c42);
    }
    .video-page .video-hero::before,
    .video-page .video-hero::after{
      content:"";
      position:absolute;
      border:1px solid rgba(178,217,255,.18);
      border-radius:50%;
    }
    .video-page .video-hero::before{width:420px;height:420px;top:-250px;right:8%}
    .video-page .video-hero::after{width:260px;height:260px;bottom:-170px;left:9%}
    .video-page .hero-copy{
      position:relative;
      z-index:1;
      max-width:780px;
      margin:auto;
      text-align:center;
    }
    .video-page .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:16px;
      padding:7px 13px;
      color:#d9ebff;
      background:rgba(255,255,255,.09);
      border:1px solid rgba(255,255,255,.17);
      border-radius:999px;
      font-size:13px;
      font-weight:800;
    }
    .video-page .eyebrow::before{
      content:"";
      width:8px;
      height:8px;
      background:#77d5ff;
      border-radius:50%;
      box-shadow:0 0 16px #77d5ff;
    }
    .video-page .video-hero h1{
      margin:0;
      font-size:clamp(34px,6vw,62px);
      line-height:1.14;
      letter-spacing:-.04em;
    }
    .video-page .video-hero p{
      max-width:680px;
      margin:18px auto 0;
      color:#d5e5fb;
      font-size:17px;
    }
    .video-page .hero-stats{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:12px;
      margin-top:28px;
    }
    .video-page .hero-stat{
      padding:10px 15px;
      color:#e8f4ff;
      background:rgba(5,23,52,.38);
      border:1px solid rgba(255,255,255,.15);
      border-radius:12px;
      font-size:13px;
    }
    .video-page .video-content{padding:56px 0 80px}
    .video-page .category-bar{
      display:flex;
      align-items:center;
      gap:10px;
      overflow-x:auto;
      margin-bottom:34px;
      padding:7px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
      box-shadow:0 10px 30px rgba(23,43,72,.06);
      scrollbar-width:thin;
    }
    .video-page .category-bar a{
      flex:0 0 auto;
      padding:10px 15px;
      color:#3b526f;
      border-radius:10px;
      font-size:14px;
      font-weight:800;
    }
    .video-page .category-bar a:first-child,
    .video-page .category-bar a:hover{color:#fff;background:var(--theme)}
    .video-page .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:24px;
    }
    .video-page .section-head h2{
      margin:0;
      color:#122b4d;
      font-size:30px;
      line-height:1.25;
    }
    .video-page .section-head p{max-width:550px;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:#fff;
      border:1px solid #dee7f1;
      border-radius:var(--radius);
      box-shadow:0 12px 32px rgba(18,43,76,.07);
      transition:.25s ease;
    }
    .video-page .video-card:hover{
      transform:translateY(-6px);
      border-color:#a9c6ed;
      box-shadow:var(--shadow);
    }
    .video-page .video-cover{
      position:relative;
      overflow:hidden;
      aspect-ratio:16/9;
      background:#102745;
    }
    .video-page .video-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .4s ease;
    }
    .video-page .video-card:hover .video-cover img{transform:scale(1.045)}
    .video-page .play-icon{
      position:absolute;
      top:50%;
      left:50%;
      width:54px;
      height:54px;
      display:grid;
      place-items:center;
      color:#fff;
      background:rgba(11,61,145,.88);
      border:2px solid rgba(255,255,255,.76);
      border-radius:50%;
      box-shadow:0 10px 28px rgba(2,16,37,.34);
      transform:translate(-50%,-50%);
    }
    .video-page .play-icon::after{
      content:"";
      margin-left:4px;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      border-left:13px solid #fff;
    }
    .video-page .duration{
      position:absolute;
      right:10px;
      bottom:10px;
      padding:4px 8px;
      color:#fff;
      background:rgba(2,10,24,.78);
      border-radius:7px;
      font-size:12px;
      font-weight:800;
    }
    .video-page .video-body{padding:19px}
    .video-page .video-label{
      display:inline-flex;
      margin-bottom:10px;
      padding:5px 9px;
      color:var(--theme);
      background:var(--theme-soft);
      border-radius:999px;
      font-size:11px;
      font-weight:900;
    }
    .video-page .video-body h3{
      display:-webkit-box;
      overflow:hidden;
      min-height:54px;
      margin:0;
      color:#152d4d;
      font-size:18px;
      line-height:1.5;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-page .video-body p{
      display:-webkit-box;
      overflow:hidden;
      min-height:65px;
      margin:10px 0 15px;
      color:var(--muted);
      font-size:14px;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:3;
    }
    .video-page .watch-link{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding-top:13px;
      color:var(--theme);
      border-top:1px solid #e7edf5;
      font-size:14px;
      font-weight:900;
    }
    .video-page .watch-link::after{content:"→";font-size:20px}
    .video-page .pagination{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:9px;
      margin-top:42px;
    }
    .video-page .pagination a{
      min-width:42px;
      height:42px;
      display:grid;
      place-items:center;
      padding:0 12px;
      color:#38506d;
      background:#fff;
      border:1px solid var(--line);
      border-radius:10px;
      font-weight:800;
    }
    .video-page .pagination a:hover,
    .video-page .pagination a.active,
    .video-page .pagination a.current{
      color:#fff;
      background:var(--theme);
      border-color:var(--theme);
    }
    .video-page .learning-note{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
      margin-top:56px;
    }
    .video-page .note-card{
      padding:24px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
    }
    .video-page .note-card strong{display:block;margin-bottom:7px;color:#17345b;font-size:17px}
    .video-page .note-card p{margin:0;color:var(--muted);font-size:14px}

    .footer{color:#cfdbec;background:#07162d}
    .footer-main{padding:58px 0 46px}
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr 1fr 1fr 1.2fr;
      gap:40px;
    }
    .footer .logo{color:#fff}
    .footer-brand p{max-width:350px;margin:18px 0;color:#9eb0c8;font-size:14px}
    .footer-social{margin-top:18px}
    .footer h3{margin:4px 0 16px;color:#fff;font-size:16px}
    .footer-links,.footer-contact{display:grid;gap:10px}
    .footer-links a,.footer-contact a{color:#aebed2;font-size:14px}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-contact span{color:#8296b0;font-size:13px;line-height:1.7}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.09)}
    .footer-bottom-inner{
      min-height:70px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      color:#879bb4;
      font-size:13px;
    }
    .footer-legal{display:flex;gap:20px}
    .footer-legal a:hover{color:#fff}

    @media (max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:block}
      .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-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:4px}
      .topbar-contact{flex-wrap:wrap;gap:5px 14px}
      .header-inner{min-height:68px;gap:10px}
      .logo img{width:37px;height:37px}
      .logo span{max-width:125px;font-size:14px}
      .header-btns>a{display:none}
      .video-page .video-hero{padding:58px 0 52px}
      .video-page .video-hero p{font-size:15px}
      .video-page .video-content{padding:38px 0 60px}
      .video-page .section-head{align-items:flex-start;flex-direction:column;gap:8px}
      .video-page .section-head h2{font-size:25px}
      .video-page .video-grid{grid-template-columns:1fr}
      .video-page .learning-note{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr;gap:30px}
      .footer-bottom-inner{align-items:flex-start;flex-direction:column;padding:20px 0}
      .footer-legal{flex-wrap:wrap}
    }