:root{
      --primary:#0B3D91;
      --theme-token:{主题色};
      --primary-dark:#06285f;
      --primary-soft:#eaf2ff;
      --ice:#f4f8ff;
      --silver:#e5ebf3;
      --ink:#071a35;
      --text:#23354d;
      --muted:#64748b;
      --white:#fff;
      --line:#dbe4ef;
      --success:#0e9f6e;
      --shadow:0 18px 45px rgba(7,26,53,.11);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:#f6f8fc;
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;
      line-height:1.65;
      overflow-x:hidden;
    }
    body,a,button,input{font:inherit}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{color:inherit}
    .container{width:min(1200px,calc(100% - 40px));margin:0 auto}
    .topbar{
      position:relative;
      z-index:1002;
      color:#dbeafe;
      background:var(--ink);
      font-size:13px;
    }
    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .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:1000;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 8px 24px rgba(7,26,53,.04);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      min-width:176px;
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--ink);
      font-weight:800;
      letter-spacing:.02em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .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-link{
      height:100%;
      padding:0 14px;
      display:flex;
      align-items:center;
      color:#25364f;
      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(--primary);
      background:#f5f8fd;
    }
    .has-arrow::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);
      transition:transform .2s ease;
    }
    .nav-item:hover .has-arrow::after,
    .nav-item:focus-within .has-arrow::after{
      transform:rotate(225deg) translate(-1px,-1px);
    }
    .dropdown-panel,.mega-menu{
      position:absolute;
      top:100%;
      right:0;
      z-index:1001;
      visibility:hidden;
      opacity:0;
      pointer-events:none;
      transform:translateY(8px);
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 18px 18px;
      box-shadow:var(--shadow);
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
    }
    .dropdown-panel::before,.mega-menu::before{
      content:"";
      position:absolute;
      right:0;
      bottom:100%;
      width:100%;
      height:12px;
    }
    .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;
      pointer-events:auto;
      transform:translateY(0);
    }
    .dropdown-panel{width:330px;padding:22px 22px 0}
    .mega-menu{width:720px;padding:24px 24px 0}
    .nav-item:nth-last-child(-n+3) .mega-menu{right:0}
    .panel-title{
      margin:0 0 13px;
      color:var(--ink);
      font-size:15px;
    }
    .panel-list{
      margin:0;
      display:grid;
      gap:7px;
    }
    .panel-list a{
      display:block;
      padding:9px 11px;
      color:#42546d;
      background:#f7f9fc;
      border-radius:9px;
      transition:color .2s ease,background .2s ease,transform .2s ease;
    }
    .panel-list a:hover{
      color:var(--primary);
      background:var(--primary-soft);
      transform:translateX(2px);
    }
    .mega-grid{
      display:grid;
      grid-template-columns:1.25fr .75fr;
      gap:28px;
    }
    .mega-column{min-width:0}
    .mega-card{
      margin-bottom:8px;
      padding:9px;
      display:flex;
      align-items:center;
      gap:11px;
      border:1px solid transparent;
      border-radius:11px;
      transition:border-color .2s ease,background .2s ease;
    }
    .mega-card:hover{
      border-color:#c9d9f3;
      background:#f5f8fd;
    }
    .mega-card img{
      width:46px;
      height:42px;
      flex:0 0 46px;
      object-fit:cover;
      border-radius:8px;
      background:#edf2f8;
    }
    .mega-card span{min-width:0;display:grid}
    .mega-card strong{
      overflow:hidden;
      color:var(--ink);
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card small{
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-footer{
      margin:18px -24px 0;
      padding:13px 24px;
      display:block;
      color:var(--primary);
      background:#f1f5fb;
      border-radius:0 0 17px 17px;
      font-size:14px;
      font-weight:700;
      text-align:right;
    }
    .dropdown-panel .mega-footer{margin:18px -22px 0;padding:13px 22px}
    .header-btns{
      display:flex;
      align-items:center;
      gap:9px;
    }
    .member-btn,.open-account{
      padding:9px 15px;
      border-radius:9px;
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
      transition:transform .2s ease,box-shadow .2s ease;
    }
    .member-btn{
      color:var(--primary);
      background:var(--primary-soft);
    }
    .open-account{
      color:#fff;
      background:var(--primary);
      box-shadow:0 8px 18px rgba(11,61,145,.2);
    }
    .member-btn:hover,.open-account:hover{transform:translateY(-1px)}
    .hamburger{
      width:42px;
      height:42px;
      padding:9px;
      display:none;
      border:0;
      border-radius:9px;
      background:#eef3fa;
      cursor:pointer;
    }
    .hamburger span{
      width:100%;
      height:2px;
      margin:5px 0;
      display:block;
      background:var(--ink);
      border-radius:2px;
      transition:transform .25s ease,opacity .25s 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(4,15,32,.58);
      backdrop-filter:blur(3px);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:1100;
      width:min(390px,88vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-24px 0 55px rgba(7,26,53,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      padding:14px 18px;
      display:flex;
      align-items:center;
      gap:10px;
      color:#fff;
      background:var(--ink);
    }
    .drawer-head span{font-weight:700}
    .drawer-head a{
      margin-left:auto;
      padding:7px 13px;
      background:var(--primary);
      border-radius:8px;
      font-size:14px;
      font-weight:700;
    }
    .drawer-close{
      width:38px;
      height:38px;
      padding:0;
      color:#fff;
      background:rgba(255,255,255,.1);
      border:0;
      border-radius:8px;
      font-size:27px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:14px}
    .drawer-link,.drawer-toggle{
      width:100%;
      min-height:48px;
      padding:11px 13px;
      display:flex;
      align-items:center;
      color:var(--ink);
      background:transparent;
      border:0;
      border-bottom:1px solid #edf1f6;
      font-weight:700;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      margin-left:auto;
      color:var(--primary);
      font-size:21px;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      padding:0 12px;
      background:#f7f9fc;
      border-radius:0 0 10px 10px;
      transition:max-height .3s ease,padding .3s ease;
    }
    .drawer-submenu.open{max-height:720px;padding:8px 12px}
    .drawer-submenu a{
      padding:9px 8px;
      display:block;
      color:#52637a;
      border-bottom:1px dashed #dfe6ef;
      font-size:14px;
    }
    .drawer-submenu a:last-child{border-bottom:0}
    .video-page{min-width:0}
    .video-page .video-masthead{
      position:relative;
      overflow:hidden;
      padding:78px 0 62px;
      color:#fff;
      background:
        radial-gradient(circle at 15% 5%,rgba(81,145,255,.35),transparent 34%),
        radial-gradient(circle at 88% 80%,rgba(19,195,211,.2),transparent 31%),
        linear-gradient(135deg,#06172f 0%,#0B3D91 62%,#082a63 100%);
    }
    .video-page .video-masthead::before,
    .video-page .video-masthead::after{
      content:"";
      position:absolute;
      border:1px solid rgba(255,255,255,.12);
      border-radius:50%;
    }
    .video-page .video-masthead::before{
      width:360px;
      height:360px;
      top:-210px;
      right:8%;
    }
    .video-page .video-masthead::after{
      width:230px;
      height:230px;
      bottom:-155px;
      left:7%;
    }
    .video-page .masthead-inner{
      position:relative;
      z-index:1;
      max-width:850px;
      text-align:center;
    }
    .video-page .eyebrow{
      margin-bottom:14px;
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:#cfe3ff;
      font-size:14px;
      font-weight:700;
      letter-spacing:.12em;
    }
    .video-page .eyebrow::before{
      content:"";
      width:8px;
      height:8px;
      background:#7dd3fc;
      border-radius:50%;
      box-shadow:0 0 0 6px rgba(125,211,252,.13);
    }
    .video-page .video-masthead h1{
      margin:0;
      font-size:clamp(34px,5vw,58px);
      line-height:1.18;
      letter-spacing:-.035em;
    }
    .video-page .video-masthead p{
      max-width:690px;
      margin:18px auto 0;
      color:#d8e6fa;
      font-size:17px;
    }
    .video-page .masthead-stats{
      margin-top:30px;
      display:flex;
      justify-content:center;
      flex-wrap:wrap;
      gap:10px;
    }
    .video-page .masthead-stats span{
      padding:8px 14px;
      color:#e7f1ff;
      background:rgba(255,255,255,.09);
      border:1px solid rgba(255,255,255,.15);
      border-radius:999px;
      font-size:13px;
      backdrop-filter:blur(8px);
    }
    .video-page .category-section{
      position:relative;
      z-index:2;
      margin-top:-25px;
    }
    .video-page .category-panel{
      padding:20px;
      display:flex;
      align-items:center;
      gap:16px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:16px;
      box-shadow:var(--shadow);
    }
    .video-page .category-label{
      flex:0 0 auto;
      color:var(--ink);
      font-weight:800;
    }
    .video-page .category-list{
      display:flex;
      flex-wrap:wrap;
      gap:9px;
    }
    .video-page .category-list a{
      padding:8px 14px;
      color:#40536d;
      background:#f2f5f9;
      border:1px solid transparent;
      border-radius:999px;
      font-size:14px;
      transition:all .2s ease;
    }
    .video-page .category-list a:hover{
      color:var(--primary);
      background:var(--primary-soft);
      border-color:#c9d9f3;
    }
    .video-page .video-content{padding:62px 0 78px}
    .video-page .section-heading{
      margin-bottom:28px;
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:24px;
    }
    .video-page .heading-copy span{
      display:block;
      color:var(--primary);
      font-size:13px;
      font-weight:800;
      letter-spacing:.1em;
    }
    .video-page .heading-copy h2{
      margin:5px 0 0;
      color:var(--ink);
      font-size:30px;
      line-height:1.25;
    }
    .video-page .heading-copy p{
      margin:8px 0 0;
      color:var(--muted);
    }
    .video-page .content-note{
      padding:8px 13px;
      color:#426083;
      background:#eaf2ff;
      border-radius:999px;
      font-size:13px;
      white-space:nowrap;
    }
    .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;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 10px 28px rgba(7,26,53,.06);
      transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
    }
    .video-page .video-card:hover{
      transform:translateY(-5px);
      border-color:#b9cbea;
      box-shadow:0 20px 45px rgba(7,26,53,.13);
    }
    .video-page .video-cover{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
      background:linear-gradient(135deg,#dbe7f8,#eef4fb);
    }
    .video-page .video-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .45s ease;
    }
    .video-page .video-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:4px solid rgba(255,255,255,.8);
      border-radius:50%;
      box-shadow:0 8px 24px rgba(3,18,42,.28);
      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:10px;
      bottom:10px;
      padding:4px 8px;
      color:#fff;
      background:rgba(4,15,32,.8);
      border-radius:6px;
      font-size:12px;
      font-weight:700;
    }
    .video-page .video-body{padding:20px}
    .video-page .card-topline{
      margin-bottom:10px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
    }
    .video-page .card-category{
      color:var(--primary);
      font-size:12px;
      font-weight:800;
      letter-spacing:.05em;
    }
    .video-page .card-status{
      display:flex;
      align-items:center;
      gap:5px;
      color:var(--success);
      font-size:12px;
    }
    .video-page .card-status::before{
      content:"";
      width:6px;
      height:6px;
      background:currentColor;
      border-radius:50%;
    }
    .video-page .video-body h3{
      margin:0;
      color:var(--ink);
      font-size:19px;
      line-height:1.45;
    }
    .video-page .video-body p{
      min-height:3.3em;
      margin:10px 0 18px;
      overflow:hidden;
      color:var(--muted);
      font-size:14px;
      line-height:1.65;
      display:-webkit-box;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-page .watch-link{
      padding-top:14px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      color:var(--primary);
      border-top:1px solid #e8edf4;
      font-size:14px;
      font-weight:800;
    }
    .video-page .watch-link::after{
      content:"→";
      font-size:19px;
      transition:transform .2s ease;
    }
    .video-page .video-card:hover .watch-link::after{transform:translateX(4px)}
    .video-page .pagination{
      margin-top:45px;
      display:flex;
      align-items:center;
      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:#40536d;
      background:#fff;
      border:1px solid var(--line);
      border-radius:9px;
      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,.2);
    }
    .video-page .video-guide{
      margin-top:64px;
      padding:34px;
      display:grid;
      grid-template-columns:1.2fr .8fr;
      align-items:center;
      gap:35px;
      color:#fff;
      background:linear-gradient(125deg,var(--ink),var(--primary-dark));
      border-radius:22px;
      box-shadow:var(--shadow);
    }
    .video-page .video-guide h2{
      margin:0 0 10px;
      font-size:27px;
      line-height:1.3;
    }
    .video-page .video-guide p{
      margin:0;
      color:#cbd9ec;
    }
    .video-page .guide-points{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:10px;
    }
    .video-page .guide-points span{
      padding:11px 13px;
      color:#e6f0ff;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.1);
      border-radius:10px;
      font-size:13px;
      text-align:center;
    }
    .footer{
      padding:58px 0 0;
      color:#c8d5e8;
      background:var(--ink);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.35fr 1fr 1fr 1fr;
      gap:42px;
    }
    .footer-brand strong{
      display:block;
      margin-bottom:13px;
      color:#fff;
      font-size:22px;
    }
    .footer p{margin:7px 0;color:#aebdd1}
    .footer h3{
      margin:0 0 15px;
      color:#fff;
      font-size:15px;
    }
    .footer-grid>div>a{
      margin:8px 0;
      display:block;
      color:#c8d5e8;
      font-size:14px;
      transition:color .2s ease,transform .2s ease;
    }
    .footer-grid>div>a:hover{
      color:#fff;
      transform:translateX(2px);
    }
    .footer-bottom{
      margin-top:45px;
      padding:20px 0;
      color:#91a5bf;
      border-top:1px solid rgba(255,255,255,.1);
      font-size:13px;
      text-align:center;
    }
    @media (max-width:1100px){
      .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:760px){
      .container{width:min(100% - 28px,1200px)}
      .topbar-inner{
        padding:8px 0;
        align-items:flex-start;
        flex-direction:column;
        gap:3px;
      }
      .topbar-contact{
        width:100%;
        align-items:flex-start;
        flex-direction:column;
        gap:2px;
      }
      .logo{min-width:0}
      .logo span{
        max-width:130px;
        overflow:hidden;
        text-overflow:ellipsis;
        white-space:nowrap;
      }
      .member-btn{display:none}
      .open-account{padding:8px 12px}
      .video-page .video-masthead{padding:58px 0 53px}
      .video-page .video-masthead p{font-size:15px}
      .video-page .category-section{margin-top:-18px}
      .video-page .category-panel{
        align-items:flex-start;
        flex-direction:column;
      }
      .video-page .video-content{padding:45px 0 60px}
      .video-page .section-heading{
        align-items:flex-start;
        flex-direction:column;
        gap:12px;
      }
      .video-page .video-grid{grid-template-columns:1fr}
      .video-page .video-guide{
        padding:27px 22px;
        grid-template-columns:1fr;
      }
      .footer-grid{grid-template-columns:1fr;gap:30px}
    }
    @media (max-width:440px){
      .header-inner{gap:9px}
      .logo img{width:37px;height:37px}
      .open-account{display:none}
      .video-page .masthead-stats{justify-content:flex-start}
      .video-page .masthead-inner{text-align:left}
      .video-page .video-masthead p{margin-left:0}
      .video-page .category-list{gap:7px}
      .video-page .category-list a{padding:7px 11px}
      .video-page .guide-points{grid-template-columns:1fr}
    }