:root{
      --theme:#0B3D91;
      --template-theme:{主题色};
      --theme-dark:#062963;
      --theme-soft:#eaf1ff;
      --ink:#142033;
      --muted:#657086;
      --line:#e4e9f1;
      --surface:#ffffff;
      --page:#f5f7fb;
      --gold:#e0b65a;
      --scarlet:#b61f31;
      --cinema:#090b10;
      --shadow:0 18px 48px rgba(17,36,71,.12);
      --radius:18px;
      --container:1240px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--page);
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;
      line-height:1.65;
      -webkit-font-smoothing:antialiased;
    }
    body.drawer-lock{overflow:hidden}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(calc(100% - 40px),var(--container));margin:0 auto}

    .topbar{
      position:relative;
      z-index:110;
      color:#dce8ff;
      background:#071a39;
      font-size:13px;
    }
    .topbar-inner{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-contact{display:flex;align-items:center;gap:22px}
    .topbar a:hover{color:#fff}

    .header{
      position:sticky;
      top:0;
      z-index:100;
      border-bottom:1px solid rgba(12,38,82,.09);
      background:rgba(255,255,255,.96);
      backdrop-filter:blur(16px);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      display:inline-flex;
      flex:0 0 auto;
      align-items:center;
      gap:11px;
      color:var(--theme-dark);
      font-size:20px;
      font-weight:800;
      letter-spacing:.01em;
    }
    .logo img{
      width:42px;
      height:42px;
      border-radius:10px;
      object-fit:contain;
    }
    .main-nav{margin-left:auto;align-self:stretch}
    .nav-list{
      height:100%;
      margin:0;
      padding:0;
      display:flex;
      align-items:stretch;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }
    .nav-item>a{
      height:100%;
      padding:0 14px;
      display:flex;
      align-items:center;
      color:#293449;
      font-size:15px;
      font-weight:650;
      white-space:nowrap;
    }
    .nav-item>a:hover,
    .nav-item:focus-within>a{color:var(--theme)}
    .nav-item>a::after{
      content:"";
      position:absolute;
      right:14px;
      bottom:0;
      left:14px;
      height:3px;
      border-radius:3px 3px 0 0;
      background:var(--theme);
      transform:scaleX(0);
      transition:.22s ease;
    }
    .nav-item:hover>a::after,
    .nav-item:focus-within>a::after{transform:scaleX(1)}

    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      right:0;
      z-index:120;
      width:420px;
      padding:22px;
      border:1px solid var(--line);
      border-radius:0 0 18px 18px;
      background:#fff;
      box-shadow:var(--shadow);
      opacity:0;
      visibility:hidden;
      transform:translateY(8px);
      transition:opacity .18s ease,transform .18s ease,visibility .18s;
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:12px;
    }
    .nav-item:hover .dropdown-panel,
    .nav-item:focus-within .dropdown-panel,
    .nav-item:hover .mega-menu,
    .nav-item:focus-within .mega-menu{
      opacity:1;
      visibility:visible;
      transform:translateY(0);
    }
    .dropdown-title,
    .mega-head{
      margin-bottom:15px;
      padding-bottom:12px;
      border-bottom:1px solid var(--line);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .dropdown-title span,
    .mega-head strong{color:#15233a;font-size:16px}
    .dropdown-title a,
    .mega-head>a{color:var(--theme);font-size:13px;font-weight:700}
    .dropdown-list{display:grid;gap:4px}
    .dropdown-list a{
      padding:9px 10px;
      border-radius:8px;
      color:#465167;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .dropdown-list a:hover{color:var(--theme);background:var(--theme-soft)}
    .mega-menu{width:680px}
    .mega-wide{
      position:fixed;
      top:114px;
      right:max(20px,calc((100vw - var(--container))/2));
      width:min(980px,calc(100vw - 40px));
      border-radius:0 0 18px 18px;
    }
    .mega-categories{
      margin-bottom:18px;
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .mega-categories a{
      padding:6px 11px;
      border:1px solid #dce4f1;
      border-radius:999px;
      color:#4e5a70;
      font-size:13px;
    }
    .mega-categories a:hover{color:#fff;border-color:var(--theme);background:var(--theme)}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }
    .mega-card{
      min-width:0;
      padding:13px;
      border:1px solid #e7ebf2;
      border-radius:12px;
      display:flex;
      align-items:center;
      gap:11px;
      background:#fff;
      transition:.2s ease;
    }
    .mega-card:hover{
      border-color:#b9cae7;
      box-shadow:0 10px 25px rgba(11,61,145,.1);
      transform:translateY(-2px);
    }
    .mega-card>img,
    .mega-media>img{
      width:54px;
      height:54px;
      flex:0 0 54px;
      border-radius:10px;
      object-fit:cover;
      background:#edf2fa;
    }
    .mega-media{align-items:flex-start}
    .mega-media>div{min-width:0}
    .mega-card strong{
      display:block;
      color:#1c2940;
      font-size:14px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card p,
    .mega-card small{
      margin:4px 0 0;
      color:#6b7589;
      font-size:12px;
      line-height:1.5;
    }
    .mega-card p{
      display:-webkit-box;
      overflow:hidden;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .mega-meta{
      margin-top:5px;
      display:flex;
      flex-wrap:wrap;
      gap:4px 10px;
      color:#748096;
      font-size:11px;
    }
    .mega-media .mega-meta{display:grid;grid-template-columns:1fr 1fr}
    .header-btns{
      display:flex;
      align-items:center;
      gap:10px;
      white-space:nowrap;
    }
    .open-account{
      padding:10px 16px;
      border-radius:10px;
      color:#fff;
      background:var(--theme);
      font-size:14px;
      font-weight:750;
      box-shadow:0 8px 20px rgba(11,61,145,.2);
    }
    .open-account:hover{background:var(--theme-dark)}
    .hamburger{
      width:44px;
      height:44px;
      padding:10px;
      border:0;
      border-radius:10px;
      display:none;
      flex-direction:column;
      justify-content:center;
      gap:5px;
      background:var(--theme-soft);
    }
    .hamburger span{
      width:100%;
      height:2px;
      border-radius:2px;
      background:var(--theme);
      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;
      inset:0;
      z-index:199;
      background:rgba(3,12,28,.64);
      opacity:0;
      visibility:hidden;
      transition:.25s ease;
    }
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:200;
      width:min(390px,90vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 60px rgba(0,0,0,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:76px;
      padding:14px 18px;
      border-bottom:1px solid var(--line);
      display:flex;
      align-items:center;
      gap:12px;
      color:var(--theme);
    }
    .drawer-head>a{
      padding:8px 13px;
      border-radius:9px;
      color:#fff;
      background:var(--theme);
      font-size:14px;
      font-weight:700;
    }
    .drawer-close{
      width:40px;
      height:40px;
      margin-left:auto;
      border:0;
      border-radius:10px;
      color:#344156;
      background:#eef2f8;
      font-size:27px;
      line-height:1;
    }
    .drawer-menu{padding:14px 18px 30px}
    .drawer-link,
    .drawer-toggle{
      width:100%;
      min-height:48px;
      padding:11px 4px;
      border:0;
      border-bottom:1px solid #edf0f5;
      display:flex;
      align-items:center;
      color:#27344a;
      background:transparent;
      text-align:left;
      font-weight:700;
    }
    .drawer-toggle::after{
      content:"+";
      margin-left:auto;
      color:var(--theme);
      font-size:20px;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      display:grid;
      background:#f7f9fc;
      transition:max-height .3s ease;
    }
    .drawer-submenu.open{max-height:650px}
    .drawer-submenu a{
      padding:10px 14px;
      border-bottom:1px solid #e8edf4;
      color:#576277;
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--theme)}

    .video-page{overflow:hidden}
    .video-page .video-masthead{
      position:relative;
      padding:74px 0 62px;
      color:#fff;
      background:
        radial-gradient(circle at 15% 20%,rgba(182,31,49,.35),transparent 30%),
        radial-gradient(circle at 85% 40%,rgba(11,61,145,.5),transparent 34%),
        linear-gradient(145deg,#07090e 0%,#101522 56%,#080a0f 100%);
    }
    .video-page .video-masthead::after{
      content:"";
      position:absolute;
      inset:0;
      pointer-events:none;
      opacity:.25;
      background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
      background-size:46px 46px;
      mask-image:linear-gradient(to bottom,#000,transparent);
    }
    .video-page .masthead-inner{position:relative;z-index:1;text-align:center}
    .video-page .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:9px;
      color:#f2cd79;
      font-size:13px;
      font-weight:800;
      letter-spacing:.18em;
    }
    .video-page .eyebrow::before{
      content:"";
      width:28px;
      height:2px;
      background:var(--scarlet);
    }
    .video-page h1{
      max-width:850px;
      margin:15px auto 14px;
      font-size:clamp(36px,5vw,64px);
      line-height:1.13;
      letter-spacing:-.035em;
    }
    .video-page .masthead-copy{
      max-width:760px;
      margin:0 auto;
      color:#bfc7d5;
      font-size:17px;
    }
    .video-page .masthead-stats{
      margin:31px auto 0;
      display:flex;
      justify-content:center;
      flex-wrap:wrap;
      gap:10px;
    }
    .video-page .masthead-stats span{
      padding:8px 14px;
      border:1px solid rgba(224,182,90,.3);
      border-radius:999px;
      color:#ead7a5;
      background:rgba(255,255,255,.05);
      font-size:13px;
    }

    .video-page .category-band{
      position:relative;
      z-index:3;
      margin-top:-22px;
    }
    .video-page .category-shell{
      padding:17px;
      border:1px solid rgba(11,61,145,.1);
      border-radius:16px;
      display:flex;
      align-items:center;
      gap:15px;
      background:#fff;
      box-shadow:0 14px 38px rgba(21,38,70,.12);
    }
    .video-page .category-label{
      flex:0 0 auto;
      color:#27354a;
      font-size:14px;
      font-weight:800;
    }
    .video-page .category-links{
      display:flex;
      align-items:center;
      gap:9px;
      overflow-x:auto;
      scrollbar-width:thin;
    }
    .video-page .category-links a{
      flex:0 0 auto;
      padding:8px 14px;
      border:1px solid #dfe5ef;
      border-radius:999px;
      color:#526078;
      background:#f9fafc;
      font-size:13px;
      font-weight:650;
    }
    .video-page .category-links a:hover{
      color:#fff;
      border-color:var(--theme);
      background:var(--theme);
    }

    .video-page .video-library{padding:66px 0 82px}
    .video-page .section-head{
      margin-bottom:27px;
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:24px;
    }
    .video-page .section-head small{
      display:block;
      margin-bottom:5px;
      color:var(--scarlet);
      font-weight:800;
      letter-spacing:.12em;
    }
    .video-page .section-head h2{
      margin:0;
      color:#162238;
      font-size:clamp(26px,3vw,38px);
      line-height:1.2;
    }
    .video-page .section-head p{
      max-width:520px;
      margin:0;
      color:var(--muted);
      text-align:right;
    }
    .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 #e1e6ee;
      border-radius:18px;
      background:#fff;
      box-shadow:0 8px 28px rgba(23,41,76,.07);
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .video-page .video-card:hover{
      border-color:#becce1;
      box-shadow:0 18px 42px rgba(15,43,90,.14);
      transform:translateY(-5px);
    }
    .video-page .video-cover{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
      background:#0a0d13;
    }
    .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 .video-cover::after{
      content:"";
      position:absolute;
      inset:42% 0 0;
      background:linear-gradient(transparent,rgba(0,0,0,.76));
    }
    .video-page .play-button{
      position:absolute;
      top:50%;
      left:50%;
      z-index:2;
      width:56px;
      height:56px;
      border:1px solid rgba(255,255,255,.5);
      border-radius:50%;
      display:grid;
      place-items:center;
      color:#fff;
      background:rgba(182,31,49,.9);
      box-shadow:0 8px 26px rgba(0,0,0,.35);
      transform:translate(-50%,-50%);
    }
    .video-page .play-button::before{
      content:"";
      margin-left:4px;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      border-left:13px solid currentColor;
    }
    .video-page .duration{
      position:absolute;
      right:11px;
      bottom:10px;
      z-index:3;
      padding:3px 8px;
      border-radius:5px;
      color:#fff;
      background:rgba(0,0,0,.72);
      font-size:12px;
    }
    .video-page .video-body{padding:19px 20px 21px}
    .video-page .video-kicker{
      margin-bottom:8px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      color:var(--theme);
      font-size:12px;
      font-weight:800;
    }
    .video-page .video-kicker span:last-child{color:#8892a3;font-weight:500}
    .video-page .video-card h3{
      margin:0;
      color:#1b283d;
      font-size:18px;
      line-height:1.45;
    }
    .video-page .video-card h3 a:hover{color:var(--theme)}
    .video-page .video-card p{
      min-height:3.1em;
      margin:10px 0 17px;
      color:#687387;
      font-size:14px;
      line-height:1.58;
      display:-webkit-box;
      overflow:hidden;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-page .watch-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--theme);
      font-size:14px;
      font-weight:800;
    }
    .video-page .watch-link::after{content:"→";transition:transform .2s ease}
    .video-page .watch-link:hover::after{transform:translateX(4px)}

    .video-page .pagination{
      margin-top:42px;
      display:flex;
      justify-content:center;
      flex-wrap:wrap;
      gap:8px;
    }
    .video-page .pagination a{
      min-width:42px;
      height:42px;
      padding:0 13px;
      border:1px solid #dce3ed;
      border-radius:10px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      color:#526078;
      background:#fff;
      font-size:14px;
      font-weight:700;
    }
    .video-page .pagination a:hover,
    .video-page .pagination a.active,
    .video-page .pagination a.current{
      color:#fff;
      border-color:var(--theme);
      background:var(--theme);
    }
    .video-page .learning-note{padding:0 0 86px}
    .video-page .note-panel{
      padding:35px;
      border-radius:22px;
      display:grid;
      grid-template-columns:1.2fr repeat(3,1fr);
      gap:24px;
      color:#fff;
      background:linear-gradient(125deg,var(--theme-dark),var(--theme));
      box-shadow:0 22px 50px rgba(11,61,145,.22);
    }
    .video-page .note-intro h2{margin:0 0 8px;font-size:27px}
    .video-page .note-intro p{margin:0;color:#d6e2f8;font-size:14px}
    .video-page .note-item{
      padding-left:20px;
      border-left:1px solid rgba(255,255,255,.2);
    }
    .video-page .note-item strong{display:block;margin-bottom:5px;color:#f0cf82}
    .video-page .note-item span{color:#d8e2f3;font-size:13px}

    .footer{color:#c7d2e5;background:#07152c}
    .footer-main{
      padding:58px 0 44px;
      display:grid;
      grid-template-columns:1.5fr 1fr 1fr 1fr;
      gap:44px;
    }
    .footer .logo{color:#fff}
    .footer-brand p{
      max-width:410px;
      margin:19px 0;
      color:#9dacC3;
      font-size:14px;
    }
    .footer-social{color:#d9e4f7}
    .footer h3{
      margin:5px 0 17px;
      color:#fff;
      font-size:16px;
    }
    .footer-links,
    .footer-contact{display:grid;gap:10px}
    .footer-links a,
    .footer-contact a{color:#aab8ce;font-size:14px}
    .footer-links a:hover,
    .footer-contact a:hover{color:#fff}
    .footer-contact span{color:#71839f;font-size:12px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.1)}
    .footer-bottom-inner{
      min-height:66px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      color:#8595ad;
      font-size:13px;
    }
    .footer-bottom-links{display:flex;gap:18px}
    .footer-bottom-links a:hover{color:#fff}

    @media (max-width:1120px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
      .video-page .video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .video-page .note-panel{grid-template-columns:1fr 1fr}
      .video-page .note-intro{grid-column:1/-1}
      .footer-main{grid-template-columns:1.3fr 1fr 1fr}
      .footer-brand{grid-column:1/-1}
    }
    @media (max-width:760px){
      .container{width:min(calc(100% - 28px),var(--container))}
      .topbar-inner{padding:7px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-contact{gap:12px;flex-wrap:wrap}
      .header-btns>.open-account{display:none}
      .logo span{font-size:17px}
      .logo img{width:36px;height:36px}
      .video-page .video-masthead{padding:56px 0 54px}
      .video-page .masthead-copy{font-size:15px}
      .video-page .category-shell{align-items:flex-start;flex-direction:column}
      .video-page .category-links{width:100%}
      .video-page .video-library{padding:52px 0 65px}
      .video-page .section-head{align-items:flex-start;flex-direction:column}
      .video-page .section-head p{text-align:left}
      .video-page .video-grid{grid-template-columns:1fr}
      .video-page .video-card p{min-height:auto}
      .video-page .note-panel{padding:27px;grid-template-columns:1fr}
      .video-page .note-intro{grid-column:auto}
      .video-page .note-item{padding:14px 0 0;border-top:1px solid rgba(255,255,255,.17);border-left:0}
      .footer-main{padding:45px 0 36px;grid-template-columns:1fr 1fr;gap:30px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom-inner{padding:18px 0;align-items:flex-start;flex-direction:column}
    }
    @media (max-width:480px){
      .topbar-inner>span{display:none}
      .topbar-contact{width:100%;justify-content:space-between}
      .header-btns{gap:7px}
      .video-page .masthead-stats{justify-content:flex-start}
      .video-page .masthead-inner{text-align:left}
      .video-page h1{font-size:36px}
      .footer-main{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
      .footer-bottom-links{flex-wrap:wrap}
    }