*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#07111F;color:#E7EEF8;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:#7EB6FF;text-decoration:none}
a:hover{color:#FFFFFF}
img{max-width:100%}
button,a{touch-action:manipulation}
.site-header{position:sticky;top:0;z-index:9000;width:100%;background:#0B1524;border-bottom:1px solid rgba(61,139,255,.28);box-shadow:0 8px 22px rgba(0,0,0,.35)}
.header-inner{max-width:1120px;min-height:64px;margin:0 auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.site-logo,.drawer-logo,.footer-logo{display:inline-flex;align-items:center;flex:0 0 auto}
.site-logo img,.drawer-logo img,.footer-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}
.logo-placeholder{display:inline-flex;align-items:center;justify-content:center;min-width:132px;height:40px;border:1px solid rgba(61,139,255,.28);border-radius:10px;background:#07111F;color:#fff;font-weight:800}
.nav-core{display:flex;align-items:center;gap:2px;min-width:0}
.nav-core a{color:#E7EEF8;padding:8px 11px;font-weight:700;text-decoration:none;white-space:nowrap}
.nav-core a.is-current,.nav-core a:hover{color:#FFFFFF;box-shadow:inset 0 -2px 0 #3D8BFF}
.main-btn{display:inline-flex;align-items:center;justify-content:center;height:40px;min-width:92px;padding:0 18px;background:linear-gradient(180deg,#5BA3FF 0%,#2F74F0 100%);color:#FFFFFF;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 8px 18px rgba(47,116,240,.28);touch-action:manipulation}
.main-btn:hover{color:#fff;filter:brightness(1.05)}
.menu-btn{display:none;background:transparent;color:#7EB6FF;border:1px solid rgba(61,139,255,.28);border-radius:10px;min-height:40px;padding:0 12px;font-weight:700}
.channel-bar{background:#0E1C30;border-bottom:1px solid rgba(61,139,255,.18)}
.channel-inner{max-width:1120px;margin:0 auto;padding:0 16px;display:flex;gap:4px;overflow-x:auto;scrollbar-width:thin}
.channel-inner a{flex:0 0 auto;padding:10px 9px;color:#9AABC4;font-size:14px;white-space:nowrap}
.channel-inner a.is-current,.channel-inner a:hover{color:#7EB6FF}
.mobile-drawer,.drawer-mask{display:none}

main{min-height:60vh}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.section{padding:42px 0}
.section.tight{padding:28px 0}
.page-hero{padding:42px 0 28px}
.breadcrumb{font-size:14px;color:#9AABC4;margin-bottom:14px}
.breadcrumb a{color:#7EB6FF}
h1,h2,h3{color:#FFFFFF;line-height:1.28;margin-top:0}
h1{font-size:clamp(28px,4vw,40px);margin-bottom:18px}
h2{font-size:clamp(22px,3vw,30px);margin-bottom:14px}
h3{font-size:19px;margin-bottom:8px}
p{margin:0 0 16px}
.lead{font-size:18px;color:#D5E2F2;max-width:780px}
.reading{max-width:800px}
.hero-grid{display:grid;grid-template-columns:42fr 58fr;gap:28px;align-items:center}
.hero-copy{padding:16px 0}
.hero-copy .main-btn{margin-top:8px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.card{background:#101C30;border:1px solid rgba(61,139,255,.28);border-radius:14px;padding:22px;box-shadow:0 14px 32px rgba(0,0,0,.35)}
.card p:last-child{margin-bottom:0}
.list-rows{border-top:1px solid rgba(61,139,255,.28)}
.list-row{display:grid;grid-template-columns:190px 1fr;gap:20px;padding:17px 4px;border-bottom:1px solid rgba(61,139,255,.18);align-items:start}
.list-row strong{color:#fff}
.notice-line{padding:22px 24px;border-left:3px solid #3D8BFF;background:#0E1C30;border-radius:0 14px 14px 0;color:#D5E2F2}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:16px;background:#07111F;aspect-ratio:3/4;border:1px solid rgba(61,139,255,.18)}
.media.wide{aspect-ratio:16/9}
.media.home-poster{min-height:420px;max-height:520px}
.media.topic-media{min-height:280px;max-height:360px}
.media > img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}
.media-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#07111F;color:#7E8DA3}
.app-strip{display:grid;grid-template-columns:180px 1fr;gap:22px;align-items:center;background:#0E1C30;border:1px solid rgba(61,139,255,.28);border-radius:14px;padding:18px}
.app-strip .media{aspect-ratio:16/9}
.tag-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.tag-links a{display:inline-flex;min-height:40px;align-items:center;padding:0 14px;border:1px solid rgba(61,139,255,.28);border-radius:999px;background:#0E1C30}
.steps{counter-reset:step;display:grid;gap:14px}
.step{position:relative;padding:18px 18px 18px 58px;background:#101C30;border-radius:14px;border:1px solid rgba(61,139,255,.18)}
.step:before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:17px;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:#3D8BFF;color:#fff;font-weight:800}
.callout{background:#0E1C30;border:1px solid rgba(61,139,255,.28);border-radius:14px;padding:20px}
.qa{padding:20px 0;border-bottom:1px solid rgba(61,139,255,.18)}
.qa h2{font-size:20px}
.side-tools{position:fixed;right:10px;top:38%;z-index:8000;width:48px;display:flex;flex-direction:column;gap:8px}
.side-tools a,.side-tools button{display:flex;align-items:center;justify-content:center;min-height:44px;padding:8px 4px;text-align:center;background:#0B1524;color:#fff;border:1px solid rgba(61,139,255,.28);border-radius:10px;font-size:12px;cursor:pointer}
.side-tools .side-primary{background:#3D8BFF}
.site-footer{background:#060E18;border-top:2px solid #3D8BFF;color:#D5E2F2;margin-top:32px;padding-bottom:20px}
.footer-grid{max-width:1120px;margin:0 auto;padding:38px 16px;display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:28px}
.footer-grid h2{font-size:17px;margin-bottom:10px}
.footer-grid a{display:block;margin:5px 0;color:#9AABC4}
.footer-bottom{max-width:1120px;margin:0 auto;padding:18px 16px 0;border-top:1px solid rgba(61,139,255,.18);font-size:14px;color:#9AABC4}
.mobile-bottom{display:none}

@media(max-width:980px){
  .header-inner{min-height:62px;display:grid;grid-template-columns:72px 1fr 96px;gap:8px}
  .menu-btn{display:inline-flex;align-items:center;justify-content:center;justify-self:start}
  .site-logo{justify-self:center}
  .site-logo img{height:36px;max-width:150px}
  .nav-core{display:none}
  .header-btn{justify-self:end;min-width:88px;padding:0 12px}
  .channel-bar{display:none}
  .hero-grid,.grid-2,.grid-3,.footer-grid{grid-template-columns:1fr}
  .app-strip{grid-template-columns:1fr}
  .list-row{grid-template-columns:1fr;gap:6px}
  .side-tools{display:none}
  .mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:8500;display:grid;grid-template-columns:repeat(4,1fr);background:#07111F;border-top:1px solid rgba(61,139,255,.35);padding-bottom:env(safe-area-inset-bottom)}
  .mobile-bottom a{min-height:52px;display:flex;align-items:center;justify-content:center;color:#D5E2F2;font-weight:700}
  body{padding-bottom:58px}
  .section{padding:30px 0}
  .page-hero{padding:30px 0 18px}
  .media.home-poster{min-height:280px;max-height:360px}
  .media.topic-media{min-height:200px;max-height:260px}

  .mobile-drawer{
    display:block;
    position:fixed;
    inset:0 auto 0 0;
    width:min(84vw,320px);
    background:#0E1A2C;
    z-index:12000;
    transform:translateX(-105%);
    transition:transform .2s ease;
    box-shadow:18px 0 40px rgba(42,24,68,.16);
    overflow:hidden;
  }
  .mobile-drawer.is-open{transform:translateX(0)}
  .drawer-mask{
    display:none;
    position:fixed;
    inset:0;
    background:rgba(42,24,68,.38);
    z-index:11000;
    opacity:0;
    pointer-events:none;
    transition:opacity .18s ease;
  }
  .drawer-mask.is-visible{
    display:block;
    opacity:1;
    pointer-events:auto;
  }
  .drawer-top{height:64px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(61,139,255,.22)}
  .drawer-top img{height:34px;max-width:145px;object-fit:contain}
  .drawer-close{min-height:40px;background:#101C30;border:1px solid rgba(61,139,255,.28);color:#fff;border-radius:10px;padding:0 12px}
  .drawer-scroll{height:calc(100% - 64px);overflow-y:auto;padding:14px}
  .drawer-group{margin-bottom:18px}
  .drawer-group h3{font-size:14px;color:#7E8DA3;margin-bottom:6px}
  .drawer-group a{display:block;min-height:40px;padding:7px 8px;border-bottom:1px solid rgba(61,139,255,.10);color:#D5E2F2}
}
@media(max-width:430px){
  .header-inner{padding:0 10px;grid-template-columns:62px 1fr 92px}
  .menu-btn{padding:0 9px}
  .header-btn{min-width:86px;font-size:14px}
  .site-logo img{max-width:132px;height:34px}
  .container{width:min(100% - 24px,1120px)}
  h1{font-size:28px}
}