:root{
  --theme:#0B3D91;
  --theme-template:{主题色};
  --theme-dark:#06275f;
  --theme-light:#eaf2ff;
  --ink:#14213d;
  --muted:#65738b;
  --line:#dce4f0;
  --surface:#ffffff;
  --page:#f5f8fc;
  --shadow:0 18px 48px 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",Arial,sans-serif;
  line-height:1.65;
}
body,
button,
input{font:inherit}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{color:inherit}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}


.topbar{
  color:#dce8ff;
  background:#061b42;
  font-size:13px;
}
.topbar .container{
  min-height:38px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.topbar a{margin-left:20px;color:#eef4ff}
.topbar a:hover{color:#fff}


.header{
  position:relative;
  z-index:60;
  background:rgba(255,255,255,.98);
  border-bottom:1px solid rgba(11,61,145,.1);
  box-shadow:0 8px 25px rgba(20,33,61,.04);
}
.header-inner{
  min-height:76px;
  display:flex;
  align-items:center;
  gap:28px;
}
.logo{
  display:flex;
  align-items:center;
  flex:0 0 auto;
  gap:11px;
  color:var(--theme-dark);
  font-size:19px;
  font-weight:800;
}
.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{
  min-height:76px;
  display:flex;
  align-items:center;
  padding:0 13px;
  color:#283750;
  font-size:15px;
  font-weight:650;
  white-space:nowrap;
}
.nav-link:hover,
.nav-item:focus-within>.nav-link{color:var(--theme)}
.has-arrow::after{
  content:"";
  width:6px;
  height:6px;
  margin:0 0 4px 8px;
  border-right:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;
  transform:rotate(45deg);
}
.dropdown-panel,
.mega-menu{
  position:absolute;
  top:100%;
  left:50%;
  width:330px;
  padding:20px;
  visibility:hidden;
  opacity:0;
  transform:translate(-50%,10px);
  color:var(--ink);
  background:#fff;
  border:1px solid var(--line);
  border-radius:0 0 18px 18px;
  box-shadow:var(--shadow);
  transition:.2s ease;
  pointer-events:none;
}
.dropdown-panel::before,
.mega-menu::before{
  content:"";
  position:absolute;
  right:0;
  bottom:100%;
  left:0;
  height:10px;
}
.mega-menu{
  width:min(780px,calc(100vw - 44px));
}
.nav-item:nth-last-child(-n+3) .mega-menu{
  left:auto;
  right:0;
  transform:translateY(10px);
}
.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;
  transform:translate(-50%,0);
  pointer-events:auto;
}
.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 14px;
  color:var(--theme);
  font-size:14px;
  font-weight:800;
  letter-spacing:.05em;
}
.panel-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.panel-list a{
  padding:7px 11px;
  color:#46556d;
  background:#f1f5fb;
  border-radius:9px;
  font-size:13px;
}
.panel-list a:hover{color:#fff;background:var(--theme)}
.mega-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:10px;
}
.mega-card{
  min-width:0;
  padding:13px;
  background:#f7f9fd;
  border:1px solid #e7edf6;
  border-radius:12px;
  transition:.2s ease;
}
.mega-card:hover{
  border-color:#a9c2ee;
  box-shadow:0 9px 22px rgba(11,61,145,.1);
  transform:translateY(-2px);
}
.mega-card strong{
  display:flex;
  align-items:center;
  gap:8px;
  overflow:hidden;
  color:#1c2d48;
  font-size:14px;
}
.mega-card strong img,
.mega-card>img{
  width:28px;
  height:28px;
  flex:0 0 28px;
  object-fit:contain;
  border-radius:7px;
}
.mega-card small{
  display:block;
  margin-top:6px;
  overflow:hidden;
  color:var(--muted);
  font-size:12px;
  line-height:1.5;
}
.mega-footer{
  display:block;
  margin-top:15px;
  padding-top:13px;
  color:var(--theme);
  border-top:1px solid var(--line);
  font-size:13px;
  font-weight:750;
}
.header-btns{
  display:flex;
  align-items:center;
  flex:0 0 auto;
  gap:9px;
}
.member-btn,
.open-btn{
  display:inline-flex;
  min-height:38px;
  align-items:center;
  justify-content:center;
  padding:0 15px;
  border-radius:10px;
  font-size:14px;
  font-weight:750;
}
.member-btn{
  color:var(--theme);
  border:1px solid #b7c9e8;
}
.open-btn{color:#fff;background:var(--theme)}
.hamburger{
  width:42px;
  height:42px;
  display:none;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  padding:0;
  background:#eef3fb;
  border:0;
  border-radius:10px;
  cursor:pointer;
}
.hamburger span{
  width:21px;
  height:2px;
  background:var(--theme-dark);
  transition:.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:90;
  inset:0;
  visibility:hidden;
  opacity:0;
  background:rgba(3,14,36,.58);
  transition:.25s ease;
}
.drawer-overlay.open{visibility:visible;opacity:1}
.mobile-drawer{
  position:fixed;
  z-index:100;
  top:0;
  right:0;
  width:min(390px,90vw);
  height:100vh;
  visibility:hidden;
  overflow-y:auto;
  transform:translateX(100%);
  background:#fff;
  box-shadow:-20px 0 50px rgba(3,14,36,.2);
  transition:.28s ease;
}
.mobile-drawer.open{visibility:visible;transform:translateX(0)}
.drawer-head{
  min-height:70px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px 18px;
  color:#fff;
  background:var(--theme-dark);
}
.drawer-head span{margin-right:auto;font-weight:750}
.drawer-head a{
  padding:7px 12px;
  color:var(--theme-dark);
  background:#fff;
  border-radius:8px;
  font-size:13px;
  font-weight:750;
}
.drawer-close{
  width:35px;
  height:35px;
  padding:0;
  color:#fff;
  background:transparent;
  border:1px solid rgba(255,255,255,.25);
  border-radius:50%;
  font-size:25px;
  cursor:pointer;
}
.drawer-menu{padding:14px 18px 30px}
.drawer-link,
.drawer-toggle{
  width:100%;
  min-height:50px;
  display:flex;
  align-items:center;
  padding:0 5px;
  background:none;
  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(--theme);
  font-size:22px;
}
.drawer-toggle.active::after{content:"−"}
.drawer-submenu{
  display:none;
  padding:8px 0 10px 13px;
  border-bottom:1px solid var(--line);
}
.drawer-submenu.open{display:block}
.drawer-submenu a{
  display:block;
  padding:8px 7px;
  color:var(--muted);
  font-size:14px;
}
.drawer-submenu a:hover{color:var(--theme)}


.video-page{min-height:620px}
.video-page .video-intro{
  position:relative;
  overflow:hidden;
  padding:72px 0 62px;
  color:#fff;
  background:
    radial-gradient(circle at 14% 24%,rgba(85,142,245,.32),transparent 27%),
    radial-gradient(circle at 84% 76%,rgba(71,115,207,.23),transparent 28%),
    linear-gradient(135deg,#061738,#0B3D91 66%,#0a2d69);
}
.video-page .video-intro::before,
.video-page .video-intro::after{
  content:"";
  position:absolute;
  border:1px solid rgba(220,232,255,.18);
  border-radius:50%;
}
.video-page .video-intro::before{
  width:330px;
  height:330px;
  top:-210px;
  right:6%;
}
.video-page .video-intro::after{
  width:190px;
  height:190px;
  bottom:-130px;
  left:8%;
}
.video-page .intro-inner{
  position:relative;
  z-index:1;
  max-width:820px;
  margin:auto;
  text-align:center;
}
.video-page .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:13px;
  color:#bdd3ff;
  font-size:13px;
  font-weight:800;
  letter-spacing:.15em;
}
.video-page .eyebrow::before,
.video-page .eyebrow::after{
  content:"";
  width:24px;
  height:1px;
  background:#7fa9f7;
}
.video-page h1{
  margin:0;
  font-size:clamp(34px,5vw,56px);
  line-height:1.18;
  letter-spacing:-.035em;
}
.video-page .intro-copy{
  max-width:680px;
  margin:18px auto 0;
  color:#d7e4fb;
  font-size:16px;
}
.video-page .category-strip{
  position:relative;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:10px;
  margin-top:28px;
}
.video-page .category-strip a{
  display:inline-flex;
  min-height:38px;
  align-items:center;
  padding:0 15px;
  color:#edf4ff;
  background:rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.22);
  border-radius:999px;
  backdrop-filter:blur(8px);
  font-size:14px;
}
.video-page .category-strip a:hover{
  color:var(--theme-dark);
  background:#fff;
}
.video-page .video-library{padding:64px 0 76px}
.video-page .section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:26px;
}
.video-page .section-head h2{
  margin:0;
  color:#10284e;
  font-size:30px;
  line-height:1.25;
}
.video-page .section-head p{
  max-width:580px;
  margin:7px 0 0;
  color:var(--muted);
}
.video-page .result-note{
  flex:0 0 auto;
  padding:8px 13px;
  color:var(--theme);
  background:var(--theme-light);
  border-radius:999px;
  font-size:13px;
  font-weight:750;
}
.video-page .video-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.video-page .video-card{
  min-width:0;
  overflow:hidden;
  background:#fff;
  border:1px solid #e0e7f2;
  border-radius:var(--radius);
  box-shadow:0 10px 30px rgba(20,33,61,.07);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.video-page .video-card:hover{
  border-color:#a8c0e9;
  box-shadow:0 19px 42px rgba(11,61,145,.15);
  transform:translateY(-5px);
}
.video-page .video-cover{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:#0a224f;
}
.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-mark{
  position:absolute;
  top:50%;
  left:50%;
  width:54px;
  height:54px;
  display:grid;
  place-items:center;
  transform:translate(-50%,-50%);
  color:var(--theme);
  background:rgba(255,255,255,.94);
  border-radius:50%;
  box-shadow:0 8px 25px rgba(0,0,0,.22);
}
.video-page .play-mark::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:11px;
  bottom:10px;
  padding:4px 8px;
  color:#fff;
  background:rgba(3,12,30,.8);
  border-radius:6px;
  font-size:12px;
}
.video-page .video-body{padding:20px}
.video-page .video-type{
  display:inline-flex;
  margin-bottom:9px;
  color:var(--theme);
  font-size:12px;
  font-weight:800;
  letter-spacing:.08em;
}
.video-page .video-body h3{
  margin:0;
  color:#172844;
  font-size:18px;
  line-height:1.45;
}
.video-page .video-body p{
  min-height:4.8em;
  margin:10px 0 18px;
  overflow:hidden;
  color:var(--muted);
  font-size:14px;
  line-height:1.6;
  display:-webkit-box;
  -webkit-box-orient:vertical;
  -webkit-line-clamp:3;
}
.video-page .watch-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:14px;
  color:var(--theme);
  border-top:1px solid var(--line);
  font-size:14px;
  font-weight:800;
}
.video-page .watch-link::after{
  content:"→";
  font-size:18px;
  transition:transform .2s ease;
}
.video-page .video-card:hover .watch-link::after{transform:translateX(4px)}
.video-page .pagination{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:8px;
  margin-top:42px;
}
.video-page .pagination a{
  min-width:42px;
  min-height:42px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:0 13px;
  color:#42516a;
  background:#fff;
  border:1px solid var(--line);
  border-radius:10px;
  font-size:14px;
  font-weight:700;
}
.video-page .pagination a:hover,
.video-page .pagination a.active,
.video-page .pagination a.current{
  color:#fff;
  background:var(--theme);
  border-color:var(--theme);
}


.footer{
  padding:58px 0 0;
  color:#becbe0;
  background:#06152f;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:44px;
  padding-bottom:42px;
}
.footer h3{
  margin:0 0 16px;
  color:#fff;
  font-size:15px;
}
.footer strong{color:#fff;font-size:21px}
.footer p{
  max-width:390px;
  margin:14px 0;
  color:#9fb0c9;
  font-size:14px;
}
.footer-grid>div>a{
  display:block;
  margin:9px 0;
  color:#afbdd2;
  font-size:14px;
}
.footer-grid>div>a:hover{color:#fff}
.footer-bottom{
  min-height:66px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  color:#8596b0;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;
}

@media (max-width:1080px){
  .main-nav{display:none}
  .header-inner{min-height:68px}
  .header-btns{margin-left:auto}
  .hamburger{display:flex}
  .video-page .video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .container{width:min(100% - 28px,1180px)}
  .topbar .container{
    min-height:45px;
    align-items:flex-start;
    flex-direction:column;
    justify-content:center;
    gap:0;
    padding:6px 0;
  }
  .topbar a{margin:0 14px 0 0}
  .logo span{max-width:145px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .member-btn{display:none}
  .open-btn{min-height:36px;padding:0 12px}
  .video-page .video-intro{padding:52px 0 48px}
  .video-page .intro-copy{font-size:15px}
  .video-page .category-strip{
    flex-wrap:nowrap;
    justify-content:flex-start;
    margin-right:-14px;
    margin-left:-14px;
    padding:0 14px 5px;
    overflow-x:auto;
  }
  .video-page .category-strip a{flex:0 0 auto}
  .video-page .video-library{padding:46px 0 58px}
  .video-page .section-head{align-items:flex-start;flex-direction:column;gap:12px}
  .video-page .section-head h2{font-size:26px}
  .video-page .video-grid{grid-template-columns:1fr}
  .video-page .video-body p{min-height:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .footer-brand{grid-column:1/-1}
  .footer-bottom{
    align-items:flex-start;
    flex-direction:column;
    justify-content:center;
    padding:16px 0;
  }
}
@media (max-width:460px){
  .logo img{width:37px;height:37px}
  .open-btn{display:none}
  .video-page h1{font-size:32px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
}