:root{--theme:#0B3D91;--ink:#151922;--muted:#647084;--line:#e5e9f0;--paper:#f6f8fb;--gold:#d6a84f;--red:#b32632}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.topbar{background:#10141c;color:#cbd2dd;font-size:13px}
.topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.topbar a{margin-left:20px;color:#dfe5ed}
.header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;min-width:max-content;font-size:20px;font-weight:800;color:var(--theme)}
.logo img{width:34px;height:34px;object-fit:contain}
.main-nav{flex:1}
.nav-list{display:flex;align-items:center;justify-content:center;gap:3px;padding:0;margin:0;list-style:none}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:6px;padding:26px 13px;font-size:15px;white-space:nowrap}
.has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px)}
.nav-item:hover>.nav-link,.nav-item:focus-within>.nav-link{color:var(--theme)}
.dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);width:290px;padding:20px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 40px rgba(16,24,40,.14);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:30}
.mega-menu{width:650px}
.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;pointer-events:auto}
.dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
.panel-title{margin:0 0 13px;font-weight:800;color:var(--theme)}
.panel-list{display:grid;gap:8px}
.panel-list a{display:block;padding:5px 0;color:#3e4858;font-size:14px}
.panel-list a:hover{color:var(--theme)}
.mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.mega-card{min-height:94px;padding:12px;background:#f6f8fb;border:1px solid var(--line);display:flex;flex-direction:column;gap:5px}
.mega-card:hover{border-color:var(--theme);background:#eef4ff}
.mega-card strong{font-size:14px;color:#1c2f54}
.mega-card small{font-size:12px;color:var(--muted);line-height:1.45}
.mega-card img{width:25px;height:25px;object-fit:contain}
.mega-footer{display:block;margin-top:16px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:14px;font-weight:700}
.header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
.member,.open-account{padding:9px 13px;font-size:13px}
.member{color:var(--theme)}
.open-account{background:var(--theme);color:#fff}
.hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
.hamburger span{display:block;width:22px;height:2px;background:#172033;margin:4px 0;transition:.2s}
.hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.drawer-overlay{display:none;position:fixed;inset:0;background:rgba(8,14,25,.55);z-index:40}
.drawer-overlay.open{display:block}
.mobile-drawer{position:fixed;top:0;right:0;width:min(380px,88vw);height:100vh;background:#fff;z-index:50;transform:translateX(105%);transition:.25s;overflow:auto}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
.drawer-head>a{margin-left:auto;color:var(--theme)}
.drawer-close{border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer;color:#526074}
.drawer-menu{padding:10px 20px 30px}
.drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;font:inherit;cursor:pointer}
.drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
.drawer-toggle.active:after{content:"−"}
.drawer-submenu{display:none;padding:5px 0 8px 15px;border-bottom:1px solid var(--line)}
.drawer-submenu.open{display:grid}
.drawer-submenu a{padding:8px 0;color:var(--muted);font-size:14px}
.footer{margin-top:70px;background:#111722;color:#d9e0ea}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:42px;padding:52px 0 38px}
.footer-brand img{width:38px;height:38px;object-fit:contain;margin-bottom:12px}
.footer-brand strong{display:block;color:#fff;font-size:18px}
.footer p{margin:10px 0;color:#9da8b8;font-size:13px}
.footer h3{margin:0 0 14px;color:#fff;font-size:15px}
.footer-grid>div:not(.footer-brand) a{display:block;margin:8px 0;color:#aeb8c8;font-size:13px}
.footer-grid a:hover{color:#fff}
.footer-bottom{padding:18px 0;border-top:1px solid #29313e;color:#8995a6;font-size:12px}
.video-page{padding:52px 0 20px}
.page-heading{text-align:center;max-width:700px;margin:0 auto 34px}
.eyebrow{margin:0 0 9px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.08em}
.page-heading h1{margin:0;font-size:clamp(28px,4vw,46px);line-height:1.2;color:#101b32}
.page-heading p{margin:14px 0 0;color:var(--muted);font-size:15px}
.video-filter{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin:0 auto 30px}
.video-filter a{padding:8px 16px;border:1px solid #d6ddea;background:#fff;color:#526074;font-size:13px}
.video-filter a.active,.video-filter a:hover{border-color:var(--theme);background:var(--theme);color:#fff}
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.video-card{background:#fff;border:1px solid var(--line);box-shadow:0 8px 24px rgba(23,35,58,.06);overflow:hidden}
.video-cover{position:relative;aspect-ratio:16/9;background:#172238;overflow:hidden}
.video-cover img{width:100%;height:100%;object-fit:cover}
.video-cover:after{content:"播放";position:absolute;left:16px;bottom:14px;padding:4px 10px;background:rgba(179,38,50,.92);color:#fff;font-size:12px}
.video-duration{position:absolute;right:12px;bottom:12px;padding:3px 7px;background:rgba(0,0,0,.72);color:#fff;font-size:12px}
.video-body{padding:17px 18px 19px}
.video-body h2{margin:0 0 8px;font-size:18px;line-height:1.4;color:#172a4d}
.video-body p{margin:0 0 13px;color:var(--muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.video-meta{display:flex;justify-content:space-between;gap:10px;color:#8792a2;font-size:12px}
.pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:7px;margin:38px 0 0}
.pagination a{min-width:35px;padding:7px 10px;text-align:center;background:#fff;border:1px solid var(--line);font-size:13px}
.pagination a.active,.pagination a:hover{background:var(--theme);border-color:var(--theme);color:#fff}
@media(max-width:1050px){
  .header-inner{gap:14px}.nav-link{padding-left:8px;padding-right:8px}.mega-menu{width:590px}
}
@media(max-width:820px){
  .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
  .topbar a{margin-left:0;margin-right:14px}
  .main-nav{display:none}.hamburger{display:block}
  .member{display:none}.header-inner{min-height:66px}
  .mega-grid{grid-template-columns:repeat(2,1fr)}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
}
@media(max-width:560px){
  .container{width:min(100% - 28px,1180px)}
  .open-account{display:none}.logo{font-size:17px}
  .video-page{padding-top:35px}.page-heading{margin-bottom:25px}
  .video-grid{grid-template-columns:1fr;gap:16px}
  .footer-grid{grid-template-columns:1fr;padding-top:38px}
  .footer{margin-top:48px}
}