:root{
      --primary:#0B3D91;
      --primary-dark:#06265e;
      --primary-soft:#eaf2ff;
      --accent:#18a4d8;
      --template-theme:{主题色};
      --ink:#14213d;
      --muted:#667085;
      --line:#e4eaf3;
      --surface:#ffffff;
      --canvas:#f5f8fc;
      --shadow:0 16px 42px rgba(11,61,145,.11);
      --radius:18px;
      --container:1220px;
    }

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

    .topbar{
      position:relative;
      z-index:120;
      color:#dceaff;
      background:var(--primary-dark);
      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:22px}
    .topbar a{transition:color .2s ease}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:110;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 18px rgba(16,34,67,.04);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:28px;
    }
    .logo{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      gap:10px;
      color:var(--primary-dark);
      font-weight:800;
      letter-spacing:.01em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .logo span{max-width:190px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .main-nav{min-width:0;flex:1;align-self:stretch}
    .nav-list{
      height:100%;
      margin:0;
      padding:0;
      display:flex;
      align-items:stretch;
      justify-content:center;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }
    .nav-link{
      height:100%;
      padding:0 14px;
      display:flex;
      align-items:center;
      gap:7px;
      color:#253555;
      font-size:15px;
      font-weight:650;
      white-space:nowrap;
      transition:color .2s ease;
    }
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--primary)}
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin-top:-4px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg);
      transition:transform .2s ease;
    }
    .nav-item:hover .has-arrow::after,.nav-item:focus-within .has-arrow::after{
      margin-top:3px;
      transform:rotate(225deg);
    }
    .nav-item::after{
      content:"";
      position:absolute;
      top:100%;
      left:0;
      right:0;
      height:12px;
      pointer-events:none;
    }

    .dropdown-panel,.mega-menu{
      position:absolute;
      top:100%;
      visibility:hidden;
      opacity:0;
      transform:translateY(10px);
      pointer-events:none;
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
    }
    .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{
      left:0;
      width:340px;
      padding:20px;
      border-radius:0 0 16px 16px;
    }
    .dropdown-title{
      margin:0 0 10px;
      color:var(--primary);
      font-weight:800;
    }
    .dropdown-panel article a{
      display:block;
      padding:9px 0;
      color:#34435f;
      border-bottom:1px solid #edf1f7;
      font-size:14px;
    }
    .dropdown-panel article a:hover{color:var(--primary)}
    .dropdown-more{
      display:inline-flex;
      margin-top:14px;
      color:var(--primary);
      font-size:14px;
      font-weight:750;
    }

    .mega-menu{
      left:50%;
      width:min(1040px,calc(100vw - 48px));
      padding:24px;
      border-radius:0 0 20px 20px;
      transform:translate(-50%,10px);
    }
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{
      transform:translate(-50%,0);
    }
    .mega-title-row{
      margin-bottom:17px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
    }
    .mega-title-row strong{color:var(--primary-dark);font-size:18px}
    .mega-title-row span{color:var(--muted);font-size:13px}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }
    .mega-card{
      min-width:0;
      padding:13px;
      display:grid;
      grid-template-columns:46px minmax(0,1fr);
      align-items:center;
      gap:4px 12px;
      background:#f8faff;
      border:1px solid #e7edf8;
      border-radius:13px;
      transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
    }
    .mega-card:hover{
      transform:translateY(-2px);
      border-color:#b8cef4;
      box-shadow:0 9px 22px rgba(11,61,145,.09);
    }
    .mega-card img{
      grid-row:1/4;
      width:46px;
      height:46px;
      object-fit:contain;
      border-radius:10px;
      background:#fff;
    }
    .mega-card strong{
      min-width:0;
      overflow:hidden;
      color:#172846;
      font-size:14px;
      white-space:nowrap;
      text-overflow:ellipsis;
    }
    .mega-card p{
      margin:1px 0 0;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      white-space:nowrap;
      text-overflow:ellipsis;
    }
    .mega-meta{
      display:flex;
      flex-wrap:wrap;
      gap:3px 10px;
      color:#72809a;
      font-size:11px;
    }
    .mega-categories{
      margin:-3px 0 17px;
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .mega-categories a{
      padding:6px 11px;
      color:#355179;
      background:#eff5ff;
      border-radius:999px;
      font-size:12px;
    }
    .mega-categories a:hover{color:#fff;background:var(--primary)}
    .mega-footer{
      margin-top:17px;
      padding-top:14px;
      display:flex;
      justify-content:flex-end;
      color:var(--primary);
      border-top:1px solid var(--line);
      font-size:14px;
      font-weight:750;
    }
    .mega-videos .video-card img{object-fit:cover}

    .header-btns{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:10px;
    }
    .header-account{font-size:14px}
    .header-account a{
      color:var(--primary);
      font-weight:700;
    }
    .header-open{
      padding:9px 17px;
      color:#fff;
      background:var(--primary);
      border:1px solid var(--primary);
      border-radius:10px;
      font-size:14px;
      font-weight:750;
      box-shadow:0 8px 18px rgba(11,61,145,.18);
      transition:background .2s ease,transform .2s ease;
    }
    .header-open:hover{background:var(--primary-dark);transform:translateY(-1px)}
    .hamburger{
      width:42px;
      height:42px;
      padding:10px;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:10px;
      cursor:pointer;
    }
    .hamburger span{
      width:20px;
      height:2px;
      display:block;
      background:var(--primary-dark);
      border-radius:2px;
      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;
      z-index:998;
      inset:0;
      visibility:hidden;
      opacity:0;
      background:rgba(5,18,45,.58);
      backdrop-filter:blur(3px);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      z-index:999;
      top:0;
      right:0;
      bottom:0;
      width:min(390px,92vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 50px rgba(5,23,56,.24);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:74px;
      padding:14px 18px;
      display:flex;
      align-items:center;
      gap:12px;
      color:#fff;
      background:linear-gradient(135deg,var(--primary-dark),var(--primary));
    }
    .drawer-head>a{
      padding:7px 11px;
      border:1px solid rgba(255,255,255,.34);
      border-radius:8px;
      font-size:14px;
    }
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      color:#fff;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.24);
      border-radius:50%;
      font-size:27px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:14px 18px 28px}
    .drawer-link,.drawer-toggle{
      width:100%;
      min-height:48px;
      padding:11px 4px;
      display:flex;
      align-items:center;
      color:#1b2a47;
      background:transparent;
      border:0;
      border-bottom:1px solid var(--line);
      font-weight:750;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      margin-left:auto;
      color:var(--primary);
      font-size:21px;
      font-weight:400;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      opacity:0;
      transition:max-height .3s ease,opacity .3s ease;
    }
    .drawer-submenu.open{max-height:800px;opacity:1}
    .drawer-submenu a{
      padding:9px 12px;
      display:block;
      color:#5b6981;
      border-left:2px solid #dce7f8;
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--primary);border-left-color:var(--primary)}

    .video-page{min-height:650px}
    .video-page .video-intro{
      position:relative;
      overflow:hidden;
      padding:72px 0 64px;
      color:#fff;
      background:
        radial-gradient(circle at 16% 28%,rgba(40,179,226,.28),transparent 28%),
        radial-gradient(circle at 85% 12%,rgba(83,135,227,.25),transparent 31%),
        linear-gradient(145deg,#061d4a 0%,#0B3D91 62%,#0e63a1 100%);
    }
    .video-page .video-intro::before,
    .video-page .video-intro::after{
      content:"";
      position:absolute;
      border:1px solid rgba(255,255,255,.13);
      border-radius:50%;
    }
    .video-page .video-intro::before{
      width:410px;
      height:410px;
      top:-260px;
      right:9%;
    }
    .video-page .video-intro::after{
      width:230px;
      height:230px;
      bottom:-170px;
      left:7%;
    }
    .video-page .intro-inner{position:relative;z-index:1;text-align:center}
    .video-page .eyebrow{
      margin:0 0 12px;
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:#bceaff;
      font-size:14px;
      font-weight:750;
      letter-spacing:.08em;
    }
    .video-page .eyebrow::before,.video-page .eyebrow::after{
      content:"";
      width:28px;
      height:1px;
      background:currentColor;
    }
    .video-page .video-intro h1{
      margin:0;
      font-size:clamp(34px,5vw,58px);
      line-height:1.16;
      letter-spacing:-.025em;
    }
    .video-page .video-intro p{
      width:min(720px,100%);
      margin:18px auto 0;
      color:#dceaff;
      font-size:17px;
    }
    .video-page .intro-points{
      margin-top:28px;
      display:flex;
      justify-content:center;
      flex-wrap:wrap;
      gap:10px;
    }
    .video-page .intro-points span{
      padding:7px 13px;
      color:#f3f9ff;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.18);
      border-radius:999px;
      font-size:13px;
      backdrop-filter:blur(8px);
    }

    .video-page .category-strip{
      position:relative;
      z-index:2;
      margin-top:-26px;
    }
    .video-page .category-panel{
      padding:17px;
      display:flex;
      align-items:center;
      gap:12px;
      overflow-x:auto;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
      box-shadow:var(--shadow);
      scrollbar-width:thin;
    }
    .video-page .category-panel strong{
      flex:0 0 auto;
      padding:8px 12px;
      color:var(--primary-dark);
      font-size:14px;
    }
    .video-page .category-panel a{
      flex:0 0 auto;
      padding:8px 14px;
      color:#475773;
      background:#f3f6fb;
      border:1px solid #e6ebf4;
      border-radius:999px;
      font-size:14px;
      transition:all .2s ease;
    }
    .video-page .category-panel a:hover{
      color:#fff;
      background:var(--primary);
      border-color:var(--primary);
    }

    .video-page .video-library{padding:70px 0 84px}
    .video-page .section-head{
      margin-bottom:28px;
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
    }
    .video-page .section-head h2{
      margin:0;
      color:#10264b;
      font-size:clamp(26px,3vw,36px);
      line-height:1.25;
    }
    .video-page .section-head p{
      margin:8px 0 0;
      color:var(--muted);
    }
    .video-page .section-mark{
      flex:0 0 auto;
      padding:7px 12px;
      color:var(--primary);
      background:var(--primary-soft);
      border-radius:999px;
      font-size:13px;
      font-weight:750;
    }
    .video-page .video-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:24px;
    }
    .video-page .library-card{
      min-width:0;
      overflow:hidden;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 10px 30px rgba(26,49,88,.07);
      transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
    }
    .video-page .library-card:hover{
      transform:translateY(-5px);
      border-color:#b8cef3;
      box-shadow:0 18px 38px rgba(11,61,145,.14);
    }
    .video-page .video-cover{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
      background:#dfe9f8;
    }
    .video-page .video-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .4s ease;
    }
    .video-page .library-card:hover .video-cover img{transform:scale(1.045)}
    .video-page .play-button{
      position:absolute;
      top:50%;
      left:50%;
      width:54px;
      height:54px;
      display:grid;
      place-items:center;
      color:#fff;
      background:rgba(11,61,145,.9);
      border:2px solid rgba(255,255,255,.72);
      border-radius:50%;
      box-shadow:0 10px 24px rgba(0,0,0,.25);
      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 #fff;
    }
    .video-page .duration{
      position:absolute;
      right:10px;
      bottom:10px;
      padding:3px 8px;
      color:#fff;
      background:rgba(4,15,34,.78);
      border-radius:6px;
      font-size:12px;
    }
    .video-page .video-body{padding:20px}
    .video-page .video-label{
      margin-bottom:9px;
      display:inline-flex;
      color:var(--primary);
      font-size:12px;
      font-weight:800;
      letter-spacing:.06em;
    }
    .video-page .video-body h3{
      margin:0;
      min-height:3.1em;
      color:#172846;
      font-size:18px;
      line-height:1.55;
    }
    .video-page .video-body p{
      margin:10px 0 15px;
      min-height:3.2em;
      overflow:hidden;
      color:var(--muted);
      font-size:14px;
      display:-webkit-box;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-page .video-meta{
      padding-top:14px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      color:#77839a;
      border-top:1px solid #edf1f6;
      font-size:12px;
    }
    .video-page .watch-link{
      color:var(--primary);
      font-weight:800;
    }

    .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;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      color:#44536d;
      background:#fff;
      border:1px solid var(--line);
      border-radius:10px;
      font-size:14px;
      font-weight:700;
      transition:all .2s ease;
    }
    .video-page .pagination a:hover,
    .video-page .pagination a.active,
    .video-page .pagination a.current{
      color:#fff;
      background:var(--primary);
      border-color:var(--primary);
      box-shadow:0 8px 18px rgba(11,61,145,.18);
    }

    .video-page .video-guide{padding:0 0 86px}
    .video-page .guide-panel{
      padding:34px;
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
      background:linear-gradient(135deg,#eef5ff,#fff);
      border:1px solid #dbe7f8;
      border-radius:22px;
    }
    .video-page .guide-item{
      padding:20px;
      background:rgba(255,255,255,.76);
      border:1px solid #e3ebf7;
      border-radius:15px;
    }
    .video-page .guide-item span{
      width:34px;
      height:34px;
      display:grid;
      place-items:center;
      color:#fff;
      background:var(--primary);
      border-radius:10px;
      font-size:13px;
      font-weight:800;
    }
    .video-page .guide-item h3{margin:13px 0 5px;font-size:17px}
    .video-page .guide-item p{margin:0;color:var(--muted);font-size:14px}

    .footer{
      color:#cfd9ea;
      background:#071a3a;
    }
    .footer-main{
      padding:62px 0 44px;
      display:grid;
      grid-template-columns:1.45fr 1fr 1fr 1.1fr;
      gap:42px;
    }
    .footer .logo{color:#fff}
    .footer .logo img{background:#fff}
    .footer-brand p{
      max-width:400px;
      margin:18px 0 0;
      color:#aebbd0;
      font-size:14px;
    }
    .footer h3{
      margin:5px 0 17px;
      color:#fff;
      font-size:16px;
    }
    .footer-links,.footer-contact{
      display:flex;
      align-items:flex-start;
      flex-direction:column;
      gap:10px;
      font-size:14px;
    }
    .footer-links a,.footer-contact a{
      color:#b8c5d9;
      transition:color .2s ease,transform .2s ease;
    }
    .footer-links a:hover,.footer-contact a:hover{
      color:#fff;
      transform:translateX(3px);
    }
    .footer-social{color:#b8c5d9}
    .footer-bottom{
      min-height:70px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      color:#93a4bd;
      border-top:1px solid rgba(255,255,255,.1);
      font-size:13px;
    }

    @media (max-width:1100px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-inner{min-height:72px}
      .header-btns{margin-left:auto}
      .video-page .video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-main{grid-template-columns:repeat(2,minmax(0,1fr))}
    }

    @media (max-width:760px){
      .container{width:min(calc(100% - 28px),var(--container))}
      .topbar-inner{
        min-height:48px;
        align-items:flex-start;
        justify-content:center;
        flex-direction:column;
        gap:2px;
        padding:6px 0;
      }
      .topbar-contact{width:100%;justify-content:space-between;gap:8px}
      .header-account{display:none}
      .header-open{padding:8px 13px}
      .logo span{max-width:145px}
      .video-page .video-intro{padding:54px 0 58px}
      .video-page .video-intro p{font-size:15px}
      .video-page .category-strip{margin-top:-20px}
      .video-page .category-panel{padding:12px}
      .video-page .video-library{padding:54px 0 66px}
      .video-page .section-head{align-items:flex-start;flex-direction:column;gap:10px}
      .video-page .video-grid{grid-template-columns:1fr}
      .video-page .video-body h3{min-height:auto}
      .video-page .guide-panel{padding:20px;grid-template-columns:1fr}
      .footer-main{padding:45px 0 34px;grid-template-columns:1fr;gap:30px}
      .footer-bottom{
        padding:18px 0;
        align-items:flex-start;
        flex-direction:column;
        justify-content:center;
        gap:4px;
      }
    }

    @media (max-width:430px){
      .logo img{width:38px;height:38px}
      .logo span{max-width:112px;font-size:14px}
      .header-open{display:none}
      .topbar-contact{align-items:flex-start;flex-direction:column}
      .video-page .intro-points{gap:7px}
      .video-page .intro-points span{padding:6px 10px}
    }