:root{
      --theme:#0B3D91;
      --theme-config:{主题色};
      --theme-dark:#06285f;
      --theme-soft:#eaf1fc;
      --accent:#f2b84b;
      --ink:#152238;
      --muted:#667085;
      --line:#e4e9f1;
      --surface:#ffffff;
      --page:#f5f7fb;
      --shadow:0 18px 46px rgba(11,61,145,.12);
      --radius:18px;
    }
    *{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;
      overflow-x:hidden;
    }
    body,button,input{font:inherit}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{color:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dce8ff;
      background:var(--theme-dark);
      font-size:13px;
    }
    .topbar .container{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-links{display:flex;align-items:center;gap:22px}
    .topbar a{transition:color .2s ease}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 18px rgba(25,42,70,.04);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:26px;
    }
    .logo{
      min-width:180px;
      display:flex;
      align-items:center;
      gap:11px;
      color:var(--theme);
      font-size:19px;
      font-weight:800;
      letter-spacing:.01em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .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:#26344b;
      font-size:15px;
      font-weight:650;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .nav-link:hover,.nav-item:focus-within>.nav-link{
      color:var(--theme);
      background:var(--theme-soft);
    }
    .has-arrow::after{
      width:6px;
      height:6px;
      margin:0 0 4px 8px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      content:"";
      transform:rotate(45deg);
    }
    .dropdown-panel,.mega-menu{
      position:absolute;
      top:100%;
      left:50%;
      z-index:80;
      visibility:hidden;
      opacity:0;
      pointer-events:none;
      transform:translate(-50%,10px);
      border:1px solid var(--line);
      border-radius:0 0 18px 18px;
      background:#fff;
      box-shadow:0 24px 54px rgba(21,34,56,.16);
      transition:opacity .2s ease,transform .2s ease,visibility .2s;
    }
    .dropdown-panel::before,.mega-menu::before{
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:12px;
      content:"";
    }
    .dropdown-panel{
      width:320px;
      padding:22px;
    }
    .mega-menu{
      width:min(760px,calc(100vw - 48px));
      padding:24px;
    }
    .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;
      pointer-events:auto;
      transform:translate(-50%,0);
    }
    .nav-item:nth-last-child(-n+3) .mega-menu{
      right:-100px;
      left:auto;
      transform:translateY(10px);
    }
    .nav-item:nth-last-child(-n+3):hover>.mega-menu,
    .nav-item:nth-last-child(-n+3):focus-within>.mega-menu{
      transform:translateY(0);
    }
    .panel-title{
      margin:0 0 12px;
      color:var(--theme);
      font-size:13px;
      font-weight:800;
      letter-spacing:.08em;
    }
    .panel-list{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:8px;
    }
    .dropdown-panel .panel-list{grid-template-columns:1fr}
    .panel-list a{
      min-width:0;
      padding:9px 11px;
      overflow:hidden;
      border-radius:9px;
      color:#35425a;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .panel-list a:hover{color:var(--theme);background:var(--theme-soft)}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:11px;
    }
    .mega-card{
      min-width:0;
      min-height:82px;
      display:flex;
      align-items:center;
      gap:11px;
      padding:12px;
      border:1px solid #edf0f5;
      border-radius:12px;
      background:#fbfcfe;
      transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
    }
    .mega-card:hover{
      transform:translateY(-2px);
      border-color:#b9cbea;
      box-shadow:0 10px 25px rgba(11,61,145,.09);
    }
    .mega-card img{
      width:48px;
      height:48px;
      flex:0 0 48px;
      object-fit:cover;
      border-radius:10px;
      background:#eef2f8;
    }
    .mega-card span{min-width:0;display:grid;gap:3px}
    .mega-card strong{
      overflow:hidden;
      color:#1d2b43;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card small{
      overflow:hidden;
      color:var(--muted);
      font-size:11px;
      line-height:1.4;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-footer{
      display:block;
      margin-top:17px;
      padding:11px;
      border-radius:10px;
      color:#fff;
      background:var(--theme);
      text-align:center;
      font-size:14px;
      font-weight:750;
    }
    .header-btns{
      display:flex;
      align-items:center;
      gap:9px;
      white-space:nowrap;
    }
    .member-link,.open-link{
      padding:9px 14px;
      border-radius:9px;
      font-size:14px;
      font-weight:750;
    }
    .member-link{color:var(--theme);border:1px solid #bfd0ee}
    .open-link{color:#fff;background:var(--theme)}
    .hamburger{
      width:42px;
      height:42px;
      display:none;
      padding:9px;
      border:0;
      border-radius:10px;
      background:var(--theme-soft);
      cursor:pointer;
    }
    .hamburger span{
      width:100%;
      height:2px;
      display:block;
      margin:5px 0;
      border-radius:2px;
      background:var(--theme);
      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:90;
      visibility:hidden;
      opacity:0;
      background:rgba(4,16,38,.56);
      transition:opacity .25s ease,visibility .25s;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:100;
      width:min(390px,90vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 50px rgba(10,28,59,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      display:flex;
      align-items:center;
      gap:12px;
      padding:14px 18px;
      color:#fff;
      background:var(--theme);
    }
    .drawer-head>span{margin-right:auto;font-weight:750}
    .drawer-head>a{
      padding:7px 12px;
      border:1px solid rgba(255,255,255,.45);
      border-radius:8px;
      font-size:14px;
    }
    .drawer-close{
      width:38px;
      height:38px;
      padding:0;
      border:0;
      color:#fff;
      background:transparent;
      font-size:30px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:13px 18px 30px}
    .drawer-link,.drawer-toggle{
      width:100%;
      min-height:50px;
      display:flex;
      align-items:center;
      padding:11px 6px;
      border:0;
      border-bottom:1px solid var(--line);
      background:transparent;
      color:#1e2d46;
      text-align:left;
      font-weight:700;
    }
    .drawer-toggle{
      position:relative;
      cursor:pointer;
    }
    .drawer-toggle::after{
      position:absolute;
      right:8px;
      content:"+";
      color:var(--theme);
      font-size:21px;
      font-weight:400;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      display:grid;
      overflow:hidden;
      background:#f7f9fc;
      transition:max-height .3s ease;
    }
    .drawer-submenu.open{max-height:680px}
    .drawer-submenu a{
      padding:10px 15px;
      border-bottom:1px solid #e8ecf3;
      color:#556176;
      font-size:14px;
    }

    .video-page{min-width:0}
    .video-page .video-hero{
      position:relative;
      overflow:hidden;
      padding:72px 0 68px;
      color:#fff;
      background:
        radial-gradient(circle at 16% 24%,rgba(105,158,255,.3),transparent 30%),
        radial-gradient(circle at 84% 30%,rgba(242,184,75,.18),transparent 26%),
        linear-gradient(135deg,#061c44 0%,#0B3D91 58%,#174f9e 100%);
    }
    .video-page .video-hero::before,
    .video-page .video-hero::after{
      position:absolute;
      border:1px solid rgba(255,255,255,.14);
      border-radius:50%;
      content:"";
    }
    .video-page .video-hero::before{
      width:390px;
      height:390px;
      top:-230px;
      right:7%;
    }
    .video-page .video-hero::after{
      width:250px;
      height:250px;
      bottom:-180px;
      left:12%;
    }
    .video-page .hero-inner{
      position:relative;
      z-index:1;
      max-width:820px;
      margin:0 auto;
      text-align:center;
    }
    .video-page .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:15px;
      padding:7px 13px;
      border:1px solid rgba(255,255,255,.22);
      border-radius:999px;
      background:rgba(255,255,255,.1);
      font-size:13px;
      font-weight:750;
    }
    .video-page .eyebrow::before{
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 5px rgba(242,184,75,.14);
      content:"";
    }
    .video-page .video-hero h1{
      margin:0;
      font-size:clamp(34px,5vw,58px);
      line-height:1.15;
      letter-spacing:-.035em;
    }
    .video-page .video-hero p{
      max-width:720px;
      margin:19px auto 0;
      color:#dce8ff;
      font-size:17px;
    }
    .video-page .hero-points{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:10px;
      margin-top:27px;
    }
    .video-page .hero-points span{
      padding:8px 13px;
      border-radius:999px;
      background:rgba(255,255,255,.1);
      color:#eef4ff;
      font-size:13px;
    }

    .video-page .category-section{
      position:relative;
      z-index:3;
      margin-top:-26px;
    }
    .video-page .category-panel{
      padding:20px;
      border:1px solid var(--line);
      border-radius:18px;
      background:#fff;
      box-shadow:var(--shadow);
    }
    .video-page .category-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      margin-bottom:14px;
    }
    .video-page .category-head h2{
      margin:0;
      color:#1a2941;
      font-size:18px;
    }
    .video-page .category-head span{
      color:var(--muted);
      font-size:13px;
    }
    .video-page .category-links{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .video-page .category-links a{
      padding:9px 15px;
      border:1px solid #dce4f1;
      border-radius:999px;
      color:#43516a;
      background:#f9fbfe;
      font-size:14px;
      font-weight:650;
      transition:all .2s ease;
    }
    .video-page .category-links a:hover{
      color:#fff;
      border-color:var(--theme);
      background:var(--theme);
      transform:translateY(-1px);
    }

    .video-page .video-content{padding:54px 0 76px}
    .video-page .section-heading{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:24px;
    }
    .video-page .section-heading h2{
      margin:0 0 5px;
      color:#17253d;
      font-size:30px;
      line-height:1.25;
    }
    .video-page .section-heading p{margin:0;color:var(--muted)}
    .video-page .section-mark{
      padding:7px 11px;
      border-radius:8px;
      color:var(--theme);
      background:var(--theme-soft);
      font-size:13px;
      font-weight:750;
    }
    .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);
      border-radius:var(--radius);
      background:#fff;
      box-shadow:0 10px 28px rgba(28,47,78,.07);
      transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
    }
    .video-page .video-card:hover{
      transform:translateY(-6px);
      border-color:#bdcdec;
      box-shadow:0 20px 42px rgba(11,61,145,.14);
    }
    .video-page .video-cover{
      position:relative;
      display:block;
      aspect-ratio:16/9;
      overflow:hidden;
      background:linear-gradient(135deg,#dce7fa,#b9ccea);
    }
    .video-page .video-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .35s 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;
      border:1px solid rgba(255,255,255,.55);
      border-radius:50%;
      color:#fff;
      background:rgba(11,61,145,.82);
      box-shadow:0 10px 24px rgba(0,0,0,.25);
      transform:translate(-50%,-50%);
      transition:transform .2s ease,background .2s ease;
    }
    .video-page .play-icon::after{
      margin-left:3px;
      border-top:8px solid transparent;
      border-bottom:8px solid transparent;
      border-left:13px solid #fff;
      content:"";
    }
    .video-page .video-card:hover .play-icon{
      background:var(--accent);
      transform:translate(-50%,-50%) scale(1.08);
    }
    .video-page .video-duration{
      position:absolute;
      right:10px;
      bottom:10px;
      padding:4px 8px;
      border-radius:6px;
      color:#fff;
      background:rgba(10,18,31,.78);
      font-size:12px;
      font-weight:700;
    }
    .video-page .video-body{padding:19px}
    .video-page .video-kicker{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:10px;
      color:var(--theme);
      font-size:12px;
      font-weight:750;
    }
    .video-page .video-body h3{
      min-height:52px;
      margin:0;
      color:#192840;
      font-size:18px;
      line-height:1.45;
    }
    .video-page .video-body h3 a:hover{color:var(--theme)}
    .video-page .video-summary{
      min-height:68px;
      margin:11px 0 16px;
      overflow:hidden;
      color:var(--muted);
      font-size:14px;
      line-height:1.65;
      display:-webkit-box;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:3;
    }
    .video-page .video-meta{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding-top:14px;
      border-top:1px solid var(--line);
      color:#758096;
      font-size:12px;
    }
    .video-page .watch-link{
      color:var(--theme);
      font-weight:800;
    }
    .video-page .watch-link::after{content:" →"}

    .video-page .pagination-wrap{
      margin-top:40px;
      display:flex;
      justify-content:center;
    }
    .video-page .pagination{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:8px;
    }
    .video-page .pagination a{
      min-width:42px;
      height:42px;
      display:grid;
      place-items:center;
      padding:0 13px;
      border:1px solid #d9e1ed;
      border-radius:10px;
      color:#415069;
      background:#fff;
      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;
      border-color:var(--theme);
      background:var(--theme);
      box-shadow:0 8px 18px rgba(11,61,145,.2);
    }
    .video-page .video-note{
      margin-top:55px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:28px;
      padding:28px 32px;
      overflow:hidden;
      border-radius:20px;
      color:#fff;
      background:linear-gradient(120deg,var(--theme-dark),var(--theme));
      box-shadow:var(--shadow);
    }
    .video-page .video-note h2{margin:0 0 7px;font-size:23px}
    .video-page .video-note p{margin:0;color:#dce8ff;font-size:14px}
    .video-page .video-note a{
      flex:0 0 auto;
      padding:11px 18px;
      border-radius:10px;
      color:var(--theme-dark);
      background:#fff;
      font-weight:800;
    }

    .footer{
      color:#cbd6e8;
      background:#071a38;
    }
    .footer .container{padding-top:58px;padding-bottom:22px}
    .footer-grid{
      display:grid;
      grid-template-columns:1.5fr 1fr 1fr 1.1fr;
      gap:42px;
    }
    .footer-brand{
      margin-bottom:14px;
      color:#fff;
      font-size:23px;
      font-weight:850;
    }
    .footer p{
      max-width:420px;
      margin:8px 0;
      color:#9fb0c9;
      font-size:14px;
    }
    .footer h3{
      margin:3px 0 16px;
      color:#fff;
      font-size:16px;
    }
    .footer-links{display:grid;gap:9px}
    .footer-links a,.footer-links span{
      color:#aebdd2;
      font-size:14px;
      transition:color .2s ease;
    }
    .footer-links a:hover{color:#fff}
    .footer-bottom{
      margin-top:42px;
      padding-top:20px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      border-top:1px solid rgba(255,255,255,.12);
      color:#8ea1bd;
      font-size:13px;
    }

    @media (max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{min-height:70px}
      .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{
        min-height:42px;
        justify-content:center;
        text-align:center;
      }
      .topbar .container>span{display:none}
      .topbar-links{gap:12px;font-size:12px}
      .logo{min-width:0}
      .logo img{width:38px;height:38px}
      .logo span{
        max-width:145px;
        overflow:hidden;
        font-size:16px;
        text-overflow:ellipsis;
        white-space:nowrap;
      }
      .member-link{display:none}
      .open-link{padding:8px 11px;font-size:13px}
      .video-page .video-hero{padding:56px 0 54px}
      .video-page .video-hero h1{font-size:34px}
      .video-page .video-hero p{font-size:15px}
      .video-page .category-section{margin-top:-18px}
      .video-page .category-panel{padding:17px}
      .video-page .category-head{align-items:flex-start;flex-direction:column;gap:3px}
      .video-page .video-content{padding:42px 0 58px}
      .video-page .section-heading{align-items:flex-start;flex-direction:column}
      .video-page .section-heading h2{font-size:25px}
      .video-page .video-grid{grid-template-columns:1fr}
      .video-page .video-body h3{min-height:0}
      .video-page .video-summary{min-height:0}
      .video-page .video-note{align-items:flex-start;flex-direction:column;padding:25px}
      .footer-grid{grid-template-columns:1fr;gap:30px}
      .footer-bottom{align-items:flex-start;flex-direction:column}
    }
    @media (max-width:420px){
      .topbar-links a:first-child{display:none}
      .logo span{max-width:105px}
      .header-btns{gap:6px}
      .video-page .category-links a{padding:8px 12px;font-size:13px}
    }