*{box-sizing:border-box}
html{background:#071017;scroll-behavior:smooth}
body{margin:0;background:#071017;color:#EAF5F4;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:inherit}
img{max-width:100%;display:block}
button{font:inherit}
.topbar{position:sticky;top:0;z-index:9000;background:rgba(7,16,23,.96);border-bottom:1px solid rgba(72,209,204,.22);backdrop-filter:blur(14px)}
.topbar-inner{width:min(1180px,calc(100% - 28px));height:70px;margin:auto;display:flex;align-items:center;gap:18px}
.brand-logo{display:inline-flex;align-items:center;text-decoration:none;flex:0 0 auto}
.brand-logo img{height:38px;width:auto;max-width:158px;object-fit:contain}
.brand-logo strong{font-size:24px;color:#78E6DE;letter-spacing:.08em}
.main-nav{display:flex;align-items:center;justify-content:center;gap:4px;flex:1;min-width:0}
.main-nav a{padding:9px 12px;border-radius:9px;text-decoration:none;color:#C8DBDA;font-weight:700;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{background:#12343A;color:#79E8DE}
.primary-btn{display:inline-flex;height:42px;min-width:78px;padding:0 17px;align-items:center;justify-content:center;border-radius:10px;background:linear-gradient(180deg,#79E8DE,#48D1CC);color:#041113;font-weight:800;text-decoration:none;white-space:nowrap}
.mobile-menu{display:none;background:transparent;color:#79E8DE;border:0;font-size:24px}
.subnav{border-top:1px solid rgba(255,255,255,.04);background:#0B1A22}
.subnav-inner{width:min(1180px,calc(100% - 28px));margin:auto;display:flex;overflow-x:auto;scrollbar-width:thin}
.subnav a{padding:12px 10px;color:#9FB8B6;text-decoration:none;white-space:nowrap;font-size:14px}
.subnav a:hover{color:#79E8DE}
.page-main{min-height:65vh;padding-bottom:28px}
.wrap{width:min(1180px,calc(100% - 28px));margin:auto}
.read{width:min(820px,calc(100% - 28px));margin:auto}
.breadcrumb{padding:22px 0 8px;color:#6F908F;font-size:14px}
.breadcrumb a{text-decoration:none;color:#9FC2BF}
.hero{padding:38px 0 24px}
.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:center}
.eyebrow{margin:0 0 10px;color:#79E8DE;font-weight:800;letter-spacing:.08em}
.hero h1,.article h1{margin:0 0 16px;color:#F4FFFE;font-size:clamp(30px,4.4vw,48px);line-height:1.14}
.hero p,.article .lead{margin:0;color:#AAC2C0;font-size:17px;line-height:1.85}
.hero-card{padding:24px;background:linear-gradient(145deg,#0E232C,#0A171D);border:1px solid rgba(72,209,204,.22);border-radius:18px;box-shadow:0 18px 42px rgba(0,0,0,.28)}
.hero-card b{display:block;color:#79E8DE;font-size:18px;margin-bottom:12px}
.hero-card ul{margin:0;padding-left:1.2em;color:#D9E9E8;line-height:1.9}
.section{padding:34px 0}
.section h2,.article h2{margin:0 0 15px;color:#79E8DE;font-size:26px;line-height:1.3}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:16px}
.section-head p{margin:0;color:#789895}
.channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.channel-card{display:block;padding:20px;min-height:150px;background:#0D2028;border:1px solid rgba(72,209,204,.18);border-radius:15px;text-decoration:none}
.channel-card:hover{border-color:#48D1CC;transform:translateY(-2px)}
.channel-card span{display:inline-flex;min-width:34px;height:34px;align-items:center;justify-content:center;border-radius:9px;background:#12343A;color:#79E8DE;font-weight:800;margin-bottom:18px}
.channel-card strong{display:block;font-size:20px;color:#F2FEFD;margin-bottom:8px}
.channel-card p{margin:0;color:#91ADAB;line-height:1.7;font-size:14px}
.poster-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.media{position:relative;width:100%;overflow:hidden;border-radius:15px;background:#0B1A22;aspect-ratio:16/9;border:1px solid rgba(72,209,204,.12)}
.media img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center}
.media-empty{background:linear-gradient(140deg,#0A171D,#112B33)}
.poster-media{height:190px}
.feature-media{height:230px}
.card-media{height:168px}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.panel{padding:22px;background:#0D2028;border:1px solid rgba(72,209,204,.18);border-radius:16px}
.panel h2,.panel h3{margin-top:0;color:#79E8DE}
.panel p{color:#B7CDCB;line-height:1.85}
.list-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.list-links a{display:block;padding:15px 16px;background:#0D2028;border:1px solid rgba(72,209,204,.16);border-radius:12px;text-decoration:none;color:#DAECEB}
.list-links a:hover{color:#79E8DE;border-color:#48D1CC}
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic-card{background:#0D2028;border:1px solid rgba(72,209,204,.18);border-radius:15px;overflow:hidden}
.topic-card .copy{padding:16px}
.topic-card h3{margin:0 0 7px;color:#F5FFFE;font-size:19px}
.topic-card p{margin:0;color:#8FADAB;line-height:1.65;font-size:14px}
.topic-card a{text-decoration:none}
.article{padding:14px 0 42px}
.article h1{font-size:clamp(28px,4vw,40px)}
.article h2{margin-top:30px}
.article h3{color:#A7F0EA;margin:22px 0 10px}
.article p{font-size:17px;line-height:1.9;color:#D6E6E5;margin:0 0 15px}
.article ul,.article ol{padding-left:1.25em}
.article li{margin:8px 0;line-height:1.85;color:#D6E6E5}
.article-box{padding:18px 20px;margin:20px 0;background:#0B1A22;border-left:3px solid #48D1CC;border-radius:0 12px 12px 0;color:#AFC6C4;line-height:1.8}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin:18px 0}
.step{padding:18px;background:#0D2028;border:1px solid rgba(72,209,204,.16);border-radius:13px}
.step b{display:block;color:#79E8DE;margin-bottom:8px}
.related{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.related a{padding:9px 13px;border-radius:9px;background:#102A32;border:1px solid rgba(72,209,204,.2);color:#9FEAE5;text-decoration:none}
.faq-list{display:grid;gap:13px}
.faq-item{padding:18px 20px;background:#0D2028;border:1px solid rgba(72,209,204,.16);border-radius:14px}
.faq-item h2{font-size:20px;margin:0 0 8px}
.faq-item p{margin:0}
.site-footer{background:#041014;border-top:1px solid rgba(72,209,204,.3)}
.footer-inner{width:min(1180px,calc(100% - 28px));margin:auto;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:24px;padding:38px 0 26px}
.footer-inner h2{font-size:17px;color:#79E8DE;margin:0 0 10px}
.footer-inner a:not(.brand-logo){display:block;padding:5px 0;color:#B7CDCB;text-decoration:none}
.footer-inner p{color:#86A5A2;line-height:1.8}
.footer-note{width:min(1180px,calc(100% - 28px));margin:auto;border-top:1px solid rgba(72,209,204,.12);padding:14px 0 22px;color:#648280;font-size:13px;line-height:1.7}
.bottom-nav{display:none}
.drawer,.drawer-mask{display:none}

@media(max-width:980px){
  .topbar-inner{height:64px;justify-content:space-between}
  .main-nav,.subnav{display:none}
  .mobile-menu{display:block}
  .brand-logo img{height:34px;max-width:132px}
  .page-main{padding-bottom:72px}
  .drawer{
    display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);background:#07171E;
    z-index:12000;transform:translateX(-105%);transition:.2s ease;box-shadow:18px 0 42px rgba(0,0,0,.45)
  }
  .drawer.open{transform:translateX(0)}
  .drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.58);z-index:11000;opacity:0;pointer-events:none}
  .drawer-mask.visible{display:block;opacity:1;pointer-events:auto}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid rgba(72,209,204,.18)}
  .drawer-close{border:0;background:#12343A;color:#79E8DE;border-radius:8px;padding:8px 10px}
  .drawer-body{height:calc(100vh - 68px);overflow:auto;padding:12px 16px 90px}
  .drawer-group{padding:12px 0;border-bottom:1px solid rgba(72,209,204,.12)}
  .drawer-group b{display:block;color:#79E8DE;margin-bottom:7px}
  .drawer-group a{display:block;padding:9px 0;text-decoration:none;color:#DCEBEA}
  .bottom-nav{display:grid;position:fixed;left:0;right:0;bottom:0;z-index:8500;grid-template-columns:repeat(4,1fr);background:#061319;border-top:1px solid #48D1CC;padding-bottom:env(safe-area-inset-bottom)}
  .bottom-nav a{min-height:55px;display:flex;align-items:center;justify-content:center;text-decoration:none;color:#D5E8E6}
  .channel-grid{grid-template-columns:repeat(2,1fr)}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .hero-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:700px){
  .hero{padding-top:26px}
  .channel-grid,.topic-grid,.poster-grid,.duo,.steps,.list-links{grid-template-columns:1fr}
  .poster-media{height:145px}
  .feature-media{height:205px}
  .footer-inner{grid-template-columns:1fr}
  .primary-btn{min-width:68px;height:39px;padding:0 13px}
  .mobile-menu{font-size:22px}
}