:root{color-scheme:dark;--bg:#080A0D;--panel:#0D1015;--card:#12161C;--second:#171C23;--hover:#1B2129;--ink:#F5F7FA;--body:#C7CDD5;--muted:#9098A3;--blue:#6EA8FF;--line:rgba(255,255,255,.09)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;font-size:16px}body.drawer-active{overflow:hidden}a{color:inherit;text-decoration:none}a:hover,a:focus-visible{color:var(--blue)}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:2px solid var(--blue);outline-offset:3px}img{display:block;max-width:100%}h1,h2,h3{color:var(--ink);line-height:1.35;margin-top:0}h1{font-size:34px}h2{font-size:26px}h3{font-size:20px}p{margin:0 0 16px}ul,ol{padding-left:1.3em}li{margin-bottom:8px}.container{max-width:1200px;margin:auto;padding-inline:24px}.narrow{max-width:840px;margin-inline:auto}.skip-link{position:absolute;top:-100px;left:12px;background:var(--panel);z-index:999;padding:10px}.skip-link:focus{top:10px}.site-header{position:relative;z-index:20;background:rgba(8,10,13,.96);border-bottom:1px solid var(--line)}.brand-bar{height:74px;position:relative;display:flex;align-items:center;justify-content:space-between;padding:0 24px}.menu-trigger{width:44px;height:44px;border:1px solid var(--line);background:#141922;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px}.menu-trigger span{display:block;width:19px;height:2px;background:#e6edf8;border-radius:2px}.brand-logo{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;align-items:center;justify-content:center;max-width:40%}.logo-media{height:35px;min-width:96px;width:auto;max-width:100%;display:flex;align-items:center;justify-content:center}.logo-media img{height:100%;width:auto;max-width:100%;object-fit:contain}.logo-media.media-placeholder{width:125px;height:35px;border:1px solid var(--line);background:linear-gradient(115deg,#131a24,#0D1015)}.entry-link{height:42px;display:flex;align-items:center;justify-content:center;background:#243958;color:#e7f1ff;border:1px solid #365884;border-radius:999px;font-size:14px;font-weight:700;padding:0 20px;white-space:nowrap}.channel-bar{height:48px;overflow-x:auto;overflow-y:hidden;background:#0D1015;scrollbar-width:thin}.channel-list{height:100%;display:flex;align-items:stretch;justify-content:space-between;gap:20px;max-width:1200px;min-width:max-content;margin:auto;padding:0 24px}.channel-list a{display:flex;align-items:center;white-space:nowrap;color:var(--body);border-bottom:2px solid transparent;font-size:14px}.channel-list a[aria-current="page"]{color:var(--blue);border-color:var(--blue)}.channel-list a:hover{color:var(--blue)}.drawer-overlay{position:fixed;inset:0;z-index:80;background:rgba(0,0,0,.65);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .18s,visibility .18s}.drawer-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.site-drawer{position:fixed;inset:0 auto 0 0;width:420px;max-width:86vw;background:#0D1015;z-index:90;overflow-y:auto;padding:24px;transform:translateX(-100%);visibility:hidden;pointer-events:none;transition:transform .2s,visibility .2s;border-right:1px solid var(--line)}.site-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between}.drawer-close{color:var(--ink);border:1px solid var(--line);background:var(--second);border-radius:10px;width:42px;height:42px;font-size:27px;line-height:1}.drawer-note{color:var(--muted);font-size:14px;margin:15px 0}.drawer-group{padding:14px 0;border-top:1px solid var(--line)}.drawer-group h3{font-size:15px;color:var(--blue);margin:0 0 8px}.drawer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 12px}.drawer-links a{font-size:14px;padding:7px 10px;border-left:2px solid transparent;border-radius:5px}.drawer-links a[aria-current="page"]{border-left-color:var(--blue);color:var(--blue);background:var(--second)}.section{padding-block:52px}.section+.section{border-top:1px solid var(--line)}.eyebrow{color:#8ED8FF;letter-spacing:.13em;font-size:12px;text-transform:uppercase;font-weight:700}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:12px;margin-bottom:22px}.section-heading h2{margin:0}.subtle{color:var(--muted);font-size:14px}.hero{padding-block:56px}.hero-grid,.split,.main-side{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:34px;align-items:center}.hero h1{font-size:40px;max-width:620px;margin:15px 0 22px}.hero p{max-width:620px}.hero-grid>.media{order:2}.hero-grid>.hero-copy{order:1}.text-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.text-links a,.inline-link{color:#8ED8FF;border-bottom:1px solid rgba(142,216,255,.5)}.media{background:#0D1015;border-radius:14px;overflow:hidden;width:100%;min-width:0;max-width:100%;display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}.media img{width:100%;height:100%;max-width:100%;object-fit:contain;object-position:center center}.media-wide{aspect-ratio:16/9;max-height:320px}.media-banner{aspect-ratio:16/7;max-height:250px}.media-square{aspect-ratio:1/1;max-height:210px}.media-device{aspect-ratio:9/16;max-height:350px}.media-placeholder{background:linear-gradient(125deg,#101723,#0D1015 62%,#131a27);position:relative}.media-placeholder:not(.logo-media):after{content:"";width:55%;height:40%;border:1px solid rgba(110,168,255,.12);border-radius:16px;transform:rotate(-9deg)}.grid{display:grid;gap:20px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.panel,.tile{min-width:0;background:var(--card);border:1px solid var(--line);border-radius:13px;padding:22px}.tile h3,.panel h3{margin:10px 0}.tile p,.panel p{font-size:15px}.tile .media{margin-bottom:14px}.num{font-size:13px;font-weight:700;color:var(--blue)}.tile-link{color:#8ED8FF;font-size:14px}.plain-list{list-style:none;padding:0;margin:0}.plain-list li{padding:17px 0;border-bottom:1px solid var(--line)}.plain-list a{color:var(--ink)}.plain-list p{font-size:14px;margin:6px 0 0;color:var(--muted)}.article-page{padding-block:44px 65px}.page-intro{max-width:850px;margin:0 auto 36px}.page-intro h1{margin:8px 0 17px}.article-layout{display:grid;grid-template-columns:minmax(0,820px) minmax(190px,1fr);gap:32px;align-items:start}.prose{min-width:0}.prose h2{margin:34px 0 14px;border-left:3px solid #5C7CFA;padding-left:13px}.prose h3{margin:24px 0 9px}.prose p{line-height:1.9}.prose a{color:#8ED8FF;text-decoration:underline;text-underline-offset:3px}.prose .media{margin:20px 0}.related{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px;position:sticky;top:18px}.related h2{font-size:18px;margin:0 0 12px}.related-links{display:grid;gap:0}.related-links a{padding:11px 0;border-top:1px solid var(--line);font-size:14px}.related-links span{color:var(--blue)}.article-footer-links{margin-top:34px;padding:20px;background:var(--panel);border:1px solid var(--line);border-radius:12px}.article-footer-links a{display:inline-block;margin:4px 16px 4px 0;color:#8ED8FF}.knowledge-list{list-style:none;padding:0;counter-reset:knowledge}.knowledge-list>li{position:relative;padding:16px 0 16px 40px;border-bottom:1px solid var(--line);counter-increment:knowledge}.knowledge-list>li:before{content:counter(knowledge,decimal-leading-zero);position:absolute;top:17px;left:0;color:var(--blue);font-size:14px;font-weight:700}.knowledge-list strong{color:var(--ink)}.note{padding:17px 20px;background:var(--second);border-left:3px solid #6EA8FF;border-radius:8px}.faq-list details{padding:18px 0;border-bottom:1px solid var(--line)}.faq-list summary{color:var(--ink);font-weight:700;cursor:pointer}.faq-list details p{margin:9px 0 0}.site-footer{background:#050608;border-top:1px solid var(--line);padding-top:42px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:26px}.footer-grid section{min-width:0}.footer-grid section h2{font-size:17px;margin-bottom:12px}.footer-grid a:not(.footer-about a){display:block;font-size:14px;margin:8px 0}.footer-about p{font-size:14px;color:var(--muted);margin-top:20px}.footer-bottom{margin-top:32px;padding-top:18px;padding-bottom:22px;border-top:1px solid var(--line);display:flex;gap:16px;justify-content:space-between;color:var(--muted);font-size:13px}.footer-bottom p{margin:0}.back-top{position:fixed;right:20px;bottom:18px;z-index:30;width:42px;height:42px;background:#243958;color:#fff;border:1px solid #365884;border-radius:50%;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s}.back-top.visible{opacity:1;visibility:visible;pointer-events:auto}
@media(max-width:980px){.container{padding-inline:20px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:minmax(0,1fr) 210px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section{padding-block:44px}}
@media(max-width:768px){.hero-grid,.split,.main-side,.article-layout{grid-template-columns:minmax(0,1fr)}.hero-grid>.media{order:1}.hero-grid>.hero-copy{order:2}.hero{padding-block:28px}.hero h1{font-size:29px}.article-page{padding-block:30px 45px}.page-intro h1{font-size:26px}.related{position:static}.section{padding-block:34px}.section-heading h2,h2{font-size:22px}h3{font-size:18px}.hero-grid>.media{max-height:210px}.media-wide{max-height:190px}.media-banner{max-height:140px}.media-square{max-height:155px}.split .media-device{max-height:350px;max-width:200px;margin:auto}}
@media(max-width:480px){body{font-size:15px}.container{padding-inline:16px}.brand-bar{height:62px;padding:0 12px}.menu-trigger{width:40px;height:40px}.logo-media{height:27px;min-width:55px}.logo-media.media-placeholder{height:27px;width:64px;min-width:0}.brand-logo{max-width:36%}.entry-link{height:38px;font-size:12px;padding:0 11px}.channel-bar{height:44px}.channel-list{padding:0 16px;gap:20px}.channel-list a{font-size:13px}.site-drawer{width:min(86vw,340px);padding:18px}.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.grid-2{grid-template-columns:repeat(1,minmax(0,1fr))}.tile,.panel{padding:15px}.tile h3{font-size:16px}.tile p{font-size:14px}.media-square{max-height:145px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.footer-bottom{display:block}.footer-bottom p{margin-top:8px}.hero h1{font-size:29px}.section{padding-block:30px}}
@media(max-width:350px){.grid-3,.grid-4{grid-template-columns:1fr}.brand-logo{max-width:29%}.entry-link{padding:0 8px;font-size:11px}.menu-trigger{width:38px;height:38px}.logo-media.media-placeholder{width:48px}.channel-list{gap:15px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}