:root{--theme:#0B3D91;--ink:#172033;--muted:#657084;--line:#e5eaf1;--paper:#f6f8fb;--white:#fff;--accent:#f5b82e}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",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:auto}
.topbar{background:#10294d;color:#dce7f7;font-size:13px}
.topbar .container{height:36px;display:flex;align-items:center;justify-content:space-between}
.top-contact{display:flex;gap:20px}
.top-contact a:hover{color:#fff}
.header{height:76px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
.header-inner{height:100%;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;min-width:190px;font-weight:800;color:var(--theme);font-size:18px}
.logo img{width:38px;height:38px;object-fit:contain}
.main-nav{flex:1;height:100%}
.nav-list{height:100%;display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-list>li{height:100%;display:flex;align-items:center;position:relative}
.nav-link{height:100%;display:flex;align-items:center;padding:0 13px;font-size:14px;font-weight:600;white-space:nowrap}
.nav-link:hover,.nav-link:focus{color:var(--theme)}
.has-arrow:after{content:"⌄";font-size:13px;margin-left:6px;color:#8994a5}
.dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:0 16px 40px #10294d1c;opacity:0;visibility:hidden;transition:.2s;z-index:30}
.nav-list>li:hover>.dropdown-panel,.nav-list>li:focus-within>.dropdown-panel,.nav-list>li:hover>.mega-menu,.nav-list>li:focus-within>.mega-menu{opacity:1;visibility:visible}
.dropdown-panel{width:260px;padding:12px}
.drop-item{display:block;padding:9px 12px;border-radius:7px;font-size:13px}
.drop-item:hover{background:#eef4fc;color:var(--theme)}
.mega-menu{width:650px;padding:22px}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.mega-title{font-size:13px;color:var(--theme);font-weight:800;margin:0 0 10px}
.mega-card{display:block;padding:9px 10px;border-bottom:1px solid #edf0f5;border-radius:5px}
.mega-card:hover{background:#f2f6fc}
.mega-card strong{display:block;font-size:13px}
.mega-card small,.meta{display:block;color:var(--muted);font-size:11px;line-height:1.5}
.mega-card img{width:24px;height:24px;float:left;margin-right:8px}
.mega-footer{display:inline-block;margin-top:14px;color:var(--theme);font-size:13px;font-weight:700}
.header-btns{display:flex;align-items:center;gap:8px;white-space:nowrap}
.member-btn,.account-btn{padding:8px 13px;border-radius:6px;font-size:13px}
.member-btn{color:var(--theme);border:1px solid #cbd8ec}
.account-btn{background:var(--theme);color:#fff}
.hamburger{display:none;border:0;background:none;padding:8px;cursor:pointer}
.hamburger span{display:block;width:23px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
.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{display:none;position:fixed;inset:0;background:#08152b99;z-index:40}
.drawer-overlay.open{display:block}
.mobile-drawer{position:fixed;top:0;right:-360px;width:min(360px,88vw);height:100vh;background:#fff;z-index:50;transition:right .25s;box-shadow:-10px 0 30px #08152b26;overflow:auto}
.mobile-drawer.open{right:0}
.drawer-head{height:70px;display:flex;align-items:center;gap:14px;padding:0 20px;border-bottom:1px solid var(--line);font-weight:700;color:var(--theme)}
.drawer-head>a{margin-left:auto;background:var(--theme);color:#fff;padding:6px 11px;border-radius:5px;font-size:13px}
.drawer-close{border:0;background:none;font-size:28px;color:var(--muted);cursor:pointer}
.drawer-menu{padding:12px 20px 30px}
.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 4px;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;font:inherit;color:var(--ink);cursor:pointer}
.drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
.drawer-toggle.active:after{content:"－"}
.drawer-submenu{display:none;padding:4px 0 8px 16px}
.drawer-submenu.open{display:block}
.drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}
.footer{background:#102033;color:#cbd5e1;margin-top:70px;padding:46px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
.footer h3{color:#fff;font-size:16px;margin:0 0 14px}
.footer p{font-size:13px;color:#aebdce;margin:7px 0}
.footer-grid a{display:block;font-size:13px;color:#cbd5e1;margin:7px 0}
.footer-grid a:hover{color:#fff}
.footer-bottom{border-top:1px solid #304158;margin-top:30px;padding:18px 0;font-size:12px;color:#91a2b7}
.video-page{padding:58px 0 10px}
.video-heading{text-align:center;max-width:760px;margin:0 auto 32px}
.video-heading .eyebrow{display:inline-block;padding:5px 13px;border-radius:30px;background:#e7eef9;color:var(--theme);font-size:12px;font-weight:700}
.video-heading h1{font-size:40px;line-height:1.2;margin:14px 0 10px;color:#132749}
.video-heading p{color:var(--muted);margin:0}
.video-categories{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:25px auto 38px}
.video-categories a{background:#fff;border:1px solid var(--line);border-radius:30px;padding:8px 17px;color:#526176;font-size:13px}
.video-categories a:first-child,.video-categories a:hover{background:var(--theme);border-color: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);border-radius:12px;overflow:hidden;box-shadow:0 8px 22px #17345e0b;transition:transform .2s,box-shadow .2s}
.video-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px #17345e18}
.video-cover{height:190px;background:#dfe8f4;position:relative;overflow:hidden}
.video-cover img{width:100%;height:100%;object-fit:cover}
.video-play{position:absolute;left:18px;bottom:16px;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--theme);font-size:18px;box-shadow:0 4px 12px #0003}
.video-duration{position:absolute;right:12px;bottom:12px;padding:3px 7px;background:#111c;color:#fff;border-radius:4px;font-size:11px}
.video-body{padding:17px 18px 18px}
.video-body h2{font-size:18px;line-height:1.4;margin:0 0 8px;color:#1b3156}
.video-body p{font-size:13px;color:var(--muted);margin:0 0 14px;min-height:42px}
.video-meta{display:flex;justify-content:space-between;gap:10px;color:#8995a6;font-size:12px}
.pagination{display:flex;justify-content:center;gap:8px;margin:42px 0 10px}
.pagination a{min-width:34px;height:34px;padding:5px 10px;text-align:center;border:1px solid var(--line);background:#fff;border-radius:5px;font-size:13px}
.pagination a.active,.pagination a:hover{background:var(--theme);border-color:var(--theme);color:#fff}
@media(max-width:1050px){
 .main-nav{display:none}.header-btns{margin-left:auto}.hamburger{display:block}
 .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:700px){
 .container{width:min(100% - 28px,1180px)}
 .topbar .container{height:auto;min-height:36px;gap:8px;padding:7px 0;align-items:flex-start}
 .top-contact{flex-direction:column;gap:0;text-align:right}
 .logo{min-width:0;font-size:16px}.logo img{width:32px;height:32px}
 .member-btn{display:none}.account-btn{padding:7px 10px}
 .video-page{padding-top:38px}.video-heading h1{font-size:31px}
 .video-grid{grid-template-columns:1fr;gap:16px}.video-cover{height:205px}
 .footer-grid{grid-template-columns:1fr;gap:22px}.footer{margin-top:45px;padding-top:34px}
}