*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#080A0D;color:#C7CDD5;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}a:hover{color:#8ED8FF}button{font:inherit;cursor:pointer}h1,h2,h3{color:#F5F7FA;line-height:1.38;margin:0 0 18px}p{margin:0 0 17px}h1{font-size:36px;letter-spacing:-.4px}h2{font-size:26px}h3{font-size:20px}.wrap{max-width:1200px;margin:0 auto;padding:0 24px}.site-header{position:relative;z-index:20;background:rgba(8,10,13,.96);border-bottom:1px solid rgba(255,255,255,.09)}.topbar{max-width:1200px;margin:auto;height:74px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 24px}.menu-trigger{width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:#171C23;border:1px solid rgba(255,255,255,.16);border-radius:10px}.menu-trigger span{height:2px;width:19px;background:#F5F7FA;border-radius:2px}.brand{justify-self:center;display:flex;align-items:center;justify-content:center;max-width:180px}.media-logo{height:36px;min-width:92px;max-width:174px;aspect-ratio:4 / 1;background:transparent!important}.media-logo img{object-fit:contain}.enter-btn{justify-self:end;display:inline-flex;justify-content:center;align-items:center;min-height:44px;padding:0 20px;border-radius:999px;background:#5C7CFA;color:white;font-weight:700;font-size:14px;white-space:nowrap}.enter-btn:hover{background:#7390FF;color:white}.channel-nav{background:#0D1015}.channel-inner{max-width:1200px;padding:0 24px;margin:auto;display:flex;gap:28px;overflow-x:auto;scrollbar-width:none}.channel-inner::-webkit-scrollbar{display:none}.channel-inner a{font-size:14px;color:#C7CDD5;white-space:nowrap;height:46px;display:flex;align-items:center;border-bottom:2px solid transparent}.channel-inner a.active{color:#6EA8FF;border-color:#6EA8FF}.drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.69);z-index:29;visibility:hidden;pointer-events:none;opacity:0;transition:opacity .2s,visibility .2s}.site-drawer{position:fixed;left:0;top:0;bottom:0;width:420px;max-width:86vw;background:#0D1015;z-index:30;visibility:hidden;pointer-events:none;transform:translateX(-100%);transition:transform .25s,visibility .25s;border-right:1px solid rgba(255,255,255,.12);display:flex;flex-direction:column}.menu-open .drawer-overlay{visibility:visible;pointer-events:auto;opacity:1}.menu-open .site-drawer{visibility:visible;pointer-events:auto;transform:translateX(0)}body.menu-open{overflow:hidden}.drawer-top{min-height:78px;display:flex;align-items:center;justify-content:space-between;padding:16px 23px;border-bottom:1px solid rgba(255,255,255,.09)}.drawer-close{border:0;color:#F5F7FA;background:#171C23;width:40px;height:40px;border-radius:9px;font-size:26px}.drawer-scroller{overflow-y:auto;padding:22px}.drawer-group{margin-bottom:26px}.drawer-group h2{font-size:14px;color:#9098A3;letter-spacing:2px;margin-bottom:10px}.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:3px}.drawer-links a{font-size:14px;padding:9px 10px;border-left:2px solid transparent;border-radius:4px}.drawer-links a.active{border-color:#6EA8FF;color:#6EA8FF;background:#171C23}.hero{display:grid;grid-template-columns:54% 46%;align-items:center;gap:0;margin:34px 0 0;background:#0D1015;border:1px solid rgba(255,255,255,.09);border-radius:14px;overflow:hidden}.hero-copy{padding:34px 42px}.eyebrow{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:#8ED8FF;margin-bottom:12px}.hero h1{font-size:42px}.hero .media{margin:20px 24px 20px 0;height:300px}.hero-links,.text-links{display:flex;gap:18px;flex-wrap:wrap;margin-top:22px}.text-links a,.hero-links a{color:#8ED8FF;font-size:14px;border-bottom:1px solid rgba(142,216,255,.45)}.section{margin-top:52px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:22px}.section-head h2{margin:0}.section-head>a{font-size:14px;color:#8ED8FF}.grid{display:grid;gap:19px}.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.panel,.tile,.article-card{min-width:0;background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:13px;padding:22px}.tile h3,.panel h3{font-size:19px}.tile p,.panel p{font-size:14px;color:#ADB7C3}.arrowlink{font-size:14px;color:#8ED8FF}.split{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:20px}.prose p{line-height:1.83}.prose h2{margin:30px 0 16px}.prose h3{margin:26px 0 13px}.stack-list>a{display:block;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.09)}.stack-list>a strong{color:#F5F7FA;display:block;font-size:17px}.stack-list>a small{font-size:13px;color:#9098A3;display:block;margin-top:3px}.index-list{counter-reset:items}.index-list>a{display:grid;grid-template-columns:42px 1fr;align-items:start;gap:12px;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.09)}.index-list>a:before{counter-increment:items;content:counter(items,decimal-leading-zero);font-size:15px;color:#6EA8FF}.index-list strong{color:#F5F7FA}.index-list small{display:block;font-size:13px;color:#9098A3}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:13px;background:#0D1015}.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center;display:block}.media-placeholder{position:absolute;inset:0;background:linear-gradient(135deg,#12161C,#1B2129)}.media-square{aspect-ratio:1 / 1}.media-wide{aspect-ratio:16 / 9}.media-banner{aspect-ratio:16 / 7}.media-device{aspect-ratio:9 / 16;max-height:360px;margin:auto;width:auto;max-width:100%}.media-logo{aspect-ratio:4 / 1}.visual-grid .media{height:175px;aspect-ratio:auto}.visual-grid h3{font-size:16px;margin:13px 0 7px}.visual-grid p{font-size:13px;color:#9098A3}.visual-grid .tile{padding:12px}.visual-grid .tile p{margin:0}.section .banner{max-height:260px}.site-note{border-left:3px solid #6EA8FF;background:#12161C;padding:18px 20px;border-radius:0 12px 12px 0;font-size:14px}.page-hero{padding-top:44px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.09)}.page-hero h1{font-size:34px;max-width:900px}.page-hero p{max-width:810px}.page-body{padding-top:24px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:40px}.article-content{max-width:850px;min-width:0}.side-nav{align-self:start;position:sticky;top:20px}.side-nav h2{font-size:18px}.side-nav a{display:block;font-size:14px;border-bottom:1px solid rgba(255,255,255,.09);padding:10px 0}.article-content .topic{margin:0 0 35px}.topic h2{font-size:25px}.topic p{font-size:16px}.article-media{max-width:680px;margin:22px 0}.article-media .media{max-height:300px}.related{margin:38px 0 60px;padding:25px;background:#12161C;border-radius:12px}.related h2{font-size:20px}.related-links{display:flex;flex-wrap:wrap;gap:12px}.related-links a{color:#8ED8FF;border:1px solid rgba(142,216,255,.25);padding:7px 12px;border-radius:7px;font-size:14px}.faq-item{border-bottom:1px solid rgba(255,255,255,.09);padding:17px 0}.faq-item h2{font-size:19px}.faq-item p{margin-bottom:0}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px;padding-top:52px;padding-bottom:38px}.site-footer{background:#050608;margin-top:60px}.site-footer h2{font-size:15px;margin-bottom:15px}.site-footer a{display:block;font-size:14px;margin:5px 0;color:#ADB7C3}.footer-brand p{font-size:14px;margin-top:17px}.footer-bottom{border-top:1px solid rgba(255,255,255,.09);padding-top:17px;padding-bottom:25px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#9098A3}.to-top{position:fixed;right:20px;bottom:20px;width:40px;height:40px;border:1px solid rgba(255,255,255,.15);border-radius:50%;background:#171C23;color:white;opacity:0;pointer-events:none;transition:opacity .2s;z-index:10}.to-top.visible{opacity:1;pointer-events:auto}@media(max-width:980px){.wrap{padding-left:20px;padding-right:20px}.hero-copy{padding:24px}.hero h1{font-size:36px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:minmax(0,1fr) 210px;gap:20px}}@media(max-width:700px){body{font-size:15px}.wrap{padding-left:16px;padding-right:16px}.topbar{padding:0 16px;height:64px}.menu-trigger{width:40px;height:40px}.brand .media-logo{height:28px;min-width:75px;max-width:105px}.enter-btn{height:40px;min-height:40px;padding:0 10px;font-size:12px}.enter-btn span{display:none}.channel-inner{padding:0 16px;gap:22px}.hero{display:flex;flex-direction:column-reverse;margin-top:18px}.hero .media{width:calc(100% - 30px);height:200px;margin:15px}.hero-copy{padding:8px 18px 22px}.hero h1{font-size:29px}.page-hero{padding-top:29px}.page-hero h1{font-size:27px}.section{margin-top:34px}.section h2{font-size:21px}.section-head{margin-bottom:15px}.cols-3{grid-template-columns:repeat(2,minmax(0,1fr))}.cols-2,.split,.article-layout{grid-template-columns:1fr}.side-nav{position:static}.visual-grid .media{height:140px}.visual-grid .tile{padding:10px}.tile,.panel,.article-card{padding:17px}.topic h2{font-size:21px}.footer-grid{gap:22px}.footer-bottom{flex-direction:column;gap:5px}.site-footer{margin-top:36px}.media-banner{max-height:145px}}@media(max-width:360px){.hero h1{font-size:28px}.cols-3{grid-template-columns:1fr}.topbar{padding:0 12px}.enter-btn{padding:0 9px}.brand .media-logo{max-width:87px}.drawer-links{grid-template-columns:1fr 1fr}}