:root{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;font-size:16px;line-height:1.8;color:#f3f4f6;background:#0b0e11;color-scheme:dark;--hub-base:#0b0e11;--hub-panel:#11161c;--hub-gold:#f0b90b;--hub-yellow:#fcd535;--hub-border:#50431d;--hub-line:#272e37;--hub-muted:#a4adba;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}h1,h2,h3,p,dl,dd,ul{margin:0}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:5px}img{display:block;max-width:100%}button{font:inherit;cursor:pointer}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--hub-yellow);outline-offset:5px}p,dd{overflow-wrap:anywhere}[hidden]{display:none!important}html{scroll-behavior:smooth;scrollbar-color:#6a6146 #0b0e11;scroll-padding-top:25px}.bn-hub-skip{position:absolute;z-index:12;background:var(--hub-yellow);color:#0b0e11;left:20px;top:0;padding:12px 20px;transform:translateY(-150%)}.bn-hub-skip:focus{transform:none}.bn-hub-site-frame{max-width:1440px;margin:auto;padding:0 48px}
.bn-hub-top{display:flex;align-items:center;gap:38px;padding:24px 0;border-bottom:1px solid var(--hub-line)}.bn-hub-brand{display:flex;align-items:center;gap:10px;flex-shrink:0}.bn-hub-brand>span{font-family:Arial,sans-serif;color:var(--hub-yellow);font-weight:750;font-size:22px;line-height:1.1;letter-spacing:.5px}.bn-hub-brand small{display:block;font-family:"PingFang SC","Microsoft YaHei",sans-serif;color:#777f8b;font-size:9px;font-weight:400;letter-spacing:1.8px;margin-top:7px}.bn-hub-top nav{display:flex;gap:30px;justify-content:center;flex:1}.bn-hub-top nav a{font-size:13px;color:#a9b1bc;padding:7px 0;white-space:nowrap}.bn-hub-top nav a[aria-current]{color:var(--hub-gold);border-bottom:1px solid var(--hub-gold)}.bn-hub-top-action{border:1px solid #806718;color:var(--hub-yellow);border-radius:4px;font-size:12px;padding:8px 17px;white-space:nowrap}.bn-hub-top-action:hover{background:#28230e;text-decoration:none}
.bn-hub-hero{padding:28px 0 37px;text-align:center}.bn-hub-crumb{display:flex;justify-content:flex-start;gap:12px;color:#78818e;font-size:11px;margin-bottom:49px}.bn-hub-crumb a{color:#a7b0bb}.bn-hub-hero h1{font-size:52px;font-weight:650;letter-spacing:-1.8px;line-height:1.4;max-width:1000px;margin:auto;text-wrap:balance}.bn-hub-lead{font-size:16px;line-height:1.95;color:var(--hub-muted);max-width:720px;margin:20px auto 0;text-wrap:pretty}.bn-hub-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:13px;margin-top:27px}.bn-hub-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:49px;padding:12px 23px;font-size:13px;font-weight:650;line-height:1.5;border-radius:4px}.bn-hub-register{background:var(--hub-yellow);color:#16181c;border:1px solid var(--hub-yellow)}.bn-hub-website{border:1px solid #766326;color:#eedb9d}.bn-hub-actions a:hover{border-color:#fff0b8;text-decoration:none}.bn-hub-channel-note{font-size:10px;color:#7c8591;max-width:650px;margin:14px auto 0;line-height:1.9}.bn-hub-review{font-size:10px;color:#7c8591;margin-top:9px}
.bn-hub-entrances{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:8px 0 52px}.bn-hub-entrances>a{border:1px solid #8b6d16;border-radius:9px;background:var(--hub-panel);padding:28px 26px 29px;text-align:left;display:flex;flex-direction:column;align-items:flex-start;position:relative;min-height:185px}.bn-hub-entrances>a:hover{border-color:var(--hub-yellow);background:#171b1b;text-decoration:none}.bn-hub-entrances strong{font-size:22px;font-weight:600;letter-spacing:-.5px;margin-top:18px;line-height:1.5}.bn-hub-entrances>a>span:last-child{color:#9aa5b3;font-size:12px;margin-top:7px;line-height:1.8}.bn-hub-route-icon{display:block;width:25px;height:25px;position:relative;color:var(--hub-gold)}.bn-hub-shield{border:1.5px solid var(--hub-gold);border-radius:5px 5px 12px 12px;width:24px;height:27px}.bn-hub-shield::before{content:"";position:absolute;width:7px;height:10px;border:1.5px solid var(--hub-gold);border-top:0;border-left:0;transform:rotate(45deg);left:7px;top:5px}.bn-hub-phone{border:1.5px solid var(--hub-gold);border-radius:4px;width:18px;height:28px}.bn-hub-phone::after{content:"";position:absolute;bottom:3px;left:5px;width:5px;height:1px;background:var(--hub-gold)}.bn-hub-screen{border:1.5px solid var(--hub-gold);border-radius:3px;width:29px;height:21px;margin-bottom:7px}.bn-hub-screen::after{content:"";position:absolute;width:13px;height:7px;border-bottom:1.5px solid var(--hub-gold);border-top:0;bottom:-8px;left:6px}
.bn-hub-content-matrix{display:flex;flex-direction:column;gap:38px}.bn-hub-module{min-width:0}.bn-hub-module-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;margin-bottom:22px}.bn-hub-module h2{font-size:26px;line-height:1.5;font-weight:600;letter-spacing:-.5px;text-wrap:balance;max-width:800px}.bn-hub-module-heading>p{font-size:12px;color:#8993a1;line-height:1.95;max-width:440px}.bn-hub-properties{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.bn-hub-spec-card{border:1px solid var(--hub-border);border-radius:8px;overflow:hidden;background:#0e1318;min-width:0}.bn-hub-spec-card header{padding:22px 23px;border-bottom:1px solid var(--hub-line);background:#151a20}.bn-hub-spec-card header p{color:#c1a85c;font-size:11px}.bn-hub-spec-card h3{font-size:24px;font-weight:600;line-height:1.5;font-family:Arial,"PingFang SC",sans-serif;margin-top:6px;overflow-wrap:anywhere}.bn-hub-spec-card dl{padding:2px 23px 8px}.bn-hub-spec-card dl>div{padding:16px 0;display:grid;grid-template-columns:46px minmax(0,1fr);gap:13px}.bn-hub-spec-card dl>div+div{border-top:1px solid #222a33}.bn-hub-spec-card dt{font-size:11px;color:#8e97a4}.bn-hub-spec-card dd{font-size:12px;line-height:1.95;color:#b5becb}.bn-hub-properties:has(>article:nth-child(2):last-child){grid-template-columns:repeat(2,minmax(0,1fr))}.bn-hub-topic-matrix{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.bn-hub-topic-matrix>article{border:1px solid var(--hub-line);border-top:2px solid #71602c;background:#10151b;padding:25px;border-radius:6px}.bn-hub-topic-matrix h3{font-size:18px;line-height:1.6;font-weight:600}.bn-hub-topic-matrix p{font-size:13px;line-height:2;color:#9faab8;margin-top:11px}.bn-hub-topic-matrix a{font-size:11px;display:inline-block;margin-top:19px;color:#d4b75f;text-decoration:underline;text-underline-offset:4px}.bn-hub-topic-matrix:has(>article:nth-child(2):last-child){grid-template-columns:repeat(2,minmax(0,1fr))}
.bn-hub-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border:1px solid var(--hub-border);border-radius:7px;background:#0e1318;overflow:hidden;margin-top:22px}.bn-hub-flow>article{padding:25px 25px 26px}.bn-hub-flow>article+article{border-left:1px solid var(--hub-border)}.bn-hub-flow b{font-size:11px;font-weight:500;border:1px solid #6a551c;border-radius:4px;width:25px;height:25px;display:grid;place-items:center;color:#e0be5c;margin-bottom:16px}.bn-hub-flow h3{font-size:17px;line-height:1.6;font-weight:600}.bn-hub-flow p{color:#9faab8;font-size:13px;line-height:1.95;margin-top:10px}.bn-hub-notice{border:1px solid #665321;border-radius:5px;padding:20px 25px;background:#19190f;margin-top:18px}.bn-hub-notice strong{font-size:14px;font-weight:600;color:#ddc66e}.bn-hub-notice p{color:#a9a386;font-size:12px;line-height:1.95;margin-top:6px}.bn-hub-sources{display:flex;gap:10px 23px;flex-wrap:wrap;margin-top:18px}.bn-hub-sources a{font-size:11px;color:#c0a85d;text-decoration:underline;text-underline-offset:4px}
.bn-hub-answers{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:start}.bn-hub-answers details{border:1px solid #3e3827;border-radius:6px;background:#11161c;min-width:0}.bn-hub-answers summary{cursor:pointer;list-style:none;padding:20px 45px 20px 22px;position:relative;font-size:14px;font-weight:550;line-height:1.8}.bn-hub-answers summary::-webkit-details-marker{display:none}.bn-hub-answers summary::after{content:"+";color:var(--hub-gold);position:absolute;right:20px;top:18px;font-size:20px;line-height:1.5;font-weight:400}.bn-hub-answers details[open]{border-color:#8d7223}.bn-hub-answers details[open] summary::after{content:"−"}.bn-hub-answer-text{padding:0 22px 22px}.bn-hub-answer-text p{color:#a4afbc;font-size:13px;line-height:1.95}.bn-hub-filter{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 12px}.bn-hub-filter button{background:transparent;border:1px solid #4b4431;color:#a9b2bf;font-size:12px;padding:9px 17px;border-radius:4px;line-height:1.5}.bn-hub-filter button[aria-pressed="true"]{background:#2a2411;border-color:#b68b14;color:var(--hub-yellow)}.bn-hub-filter-status{font-size:11px;color:#777f8c;margin-bottom:17px}
.bn-hub-other-paths{margin:45px 0 0;padding:30px 0;border-top:1px solid var(--hub-line);display:flex;align-items:center;justify-content:space-between;gap:25px}.bn-hub-other-paths strong{font-size:15px;font-weight:500}.bn-hub-other-paths>div{display:flex;gap:10px;flex-wrap:wrap}.bn-hub-other-paths a{font-size:12px;color:#c0a761;padding:9px 14px;border:1px solid #4c4229;border-radius:4px}.bn-hub-footer{border-top:1px solid var(--hub-line);padding:30px 0}.bn-hub-footer-navigation{display:flex;justify-content:space-between;gap:30px;align-items:flex-start}.bn-hub-footer-navigation>nav{display:flex;gap:23px;flex-wrap:wrap;font-size:11px;color:#8c96a4}.bn-hub-footer-navigation details{min-width:245px}.bn-hub-footer-navigation summary{font-size:11px;color:#bba258;cursor:pointer}.bn-hub-footer-navigation ul{padding-left:16px;margin-top:14px;font-size:10px;color:#8e98a7;line-height:2}.bn-hub-footer-navigation li+li{margin-top:6px}.bn-hub-disclosure{border-top:1px solid #202731;margin-top:25px;padding-top:18px;max-width:100%}.bn-hub-disclosure p{font-size:10px;color:#727d8c;line-height:1.95}.bn-hub-disclosure p+p{margin-top:6px}.bn-hub-disclosure a{color:#b4a16a}
@media(max-width:1100px){.bn-hub-site-frame{padding:0 30px}.bn-hub-top{gap:25px}.bn-hub-top nav{gap:19px}.bn-hub-top nav a{font-size:12px}.bn-hub-hero h1{font-size:44px}.bn-hub-entrances strong{font-size:20px}.bn-hub-entrances>a{padding:24px 21px}.bn-hub-module-heading{align-items:flex-start;flex-direction:column;gap:12px}.bn-hub-module-heading>p{max-width:76ch}.bn-hub-properties{gap:14px}.bn-hub-spec-card header{padding:19px}.bn-hub-spec-card dl{padding-left:19px;padding-right:19px}.bn-hub-spec-card h3{font-size:21px}.bn-hub-topic-matrix{gap:14px}.bn-hub-topic-matrix>article{padding:22px}.bn-hub-other-paths{align-items:flex-start;flex-direction:column;gap:19px}}
@media(max-width:800px){.bn-hub-site-frame{padding:0 24px}.bn-hub-top{flex-wrap:wrap;justify-content:space-between;padding:19px 0 15px;gap:19px}.bn-hub-top nav{order:3;flex-basis:100%;justify-content:space-between;gap:15px}.bn-hub-top nav a{font-size:12px;padding:4px 0}.bn-hub-top-action{font-size:11px;padding:8px 14px}.bn-hub-hero{padding-top:22px}.bn-hub-crumb{margin-bottom:34px;font-size:10px}.bn-hub-hero h1{font-size:37px;letter-spacing:-1.1px;max-width:680px}.bn-hub-lead{font-size:14px;max-width:620px}.bn-hub-entrances{gap:12px;margin-bottom:36px}.bn-hub-entrances>a{padding:21px 17px;min-height:185px}.bn-hub-entrances strong{font-size:17px}.bn-hub-entrances>a>span:last-child{font-size:10px}.bn-hub-properties{grid-template-columns:1fr}.bn-hub-spec-card header{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:18px 22px}.bn-hub-spec-card header p{order:2;font-size:10px}.bn-hub-spec-card h3{margin-top:0;font-size:23px}.bn-hub-spec-card dl{padding:0 22px 4px}.bn-hub-spec-card dl>div{grid-template-columns:58px minmax(0,1fr);padding:14px 0}.bn-hub-spec-card dt{font-size:11px}.bn-hub-spec-card dd{font-size:13px}.bn-hub-properties:has(>article:nth-child(2):last-child){grid-template-columns:1fr}.bn-hub-topic-matrix{grid-template-columns:1fr}.bn-hub-topic-matrix:has(>article:nth-child(2):last-child){grid-template-columns:1fr}.bn-hub-topic-matrix>article{padding:23px}.bn-hub-topic-matrix h3{font-size:18px}.bn-hub-flow{grid-template-columns:1fr}.bn-hub-flow>article{padding:21px 23px 23px;display:grid;grid-template-columns:27px minmax(0,1fr);gap:8px 18px}.bn-hub-flow>article+article{border-left:0;border-top:1px solid var(--hub-border)}.bn-hub-flow b{grid-row:1/3;margin:2px 0 0}.bn-hub-flow h3{font-size:17px}.bn-hub-flow p{grid-column:2;margin:0;font-size:13px}.bn-hub-module h2{font-size:24px}.bn-hub-content-matrix{gap:32px}.bn-hub-answers{grid-template-columns:1fr}.bn-hub-footer-navigation{flex-direction:column;gap:24px}.bn-hub-footer-navigation>nav{gap:12px 22px}}
@media(max-width:500px){.bn-hub-site-frame{padding:0 20px}.bn-hub-top nav{gap:10px}.bn-hub-top nav a{font-size:10px}.bn-hub-brand>span{font-size:21px}.bn-hub-brand small{font-size:9px}.bn-hub-hero h1{font-size:32px;line-height:1.45;letter-spacing:-.8px}.bn-hub-lead{font-size:14px;line-height:1.95;margin-top:18px;text-align:left}.bn-hub-crumb{margin-bottom:28px}.bn-hub-actions{flex-direction:column;margin-top:23px;gap:10px}.bn-hub-actions a{font-size:12px;min-height:46px;width:100%}.bn-hub-channel-note{font-size:10px;text-align:left;margin-top:13px}.bn-hub-review{text-align:left;font-size:10px;line-height:1.9;margin-top:9px}.bn-hub-hero{padding-bottom:26px}.bn-hub-entrances{grid-template-columns:1fr;gap:11px;margin:0 0 32px}.bn-hub-entrances>a{display:grid;grid-template-columns:32px minmax(0,1fr);gap:6px 20px;min-height:0;padding:21px 22px}.bn-hub-route-icon{grid-row:1/3;margin-top:4px}.bn-hub-entrances strong{margin-top:0;font-size:19px;letter-spacing:-.4px}.bn-hub-entrances>a>span:last-child{font-size:11px;margin-top:0;grid-column:2}.bn-hub-module h2{font-size:22px;line-height:1.55}.bn-hub-module-heading{gap:10px;margin-bottom:18px}.bn-hub-module-heading>p{font-size:12px}.bn-hub-spec-card header{padding:17px 20px}.bn-hub-spec-card h3{font-size:21px}.bn-hub-spec-card dl{padding-left:20px;padding-right:20px}.bn-hub-spec-card dl>div{grid-template-columns:42px minmax(0,1fr);gap:12px}.bn-hub-spec-card dd{font-size:12px}.bn-hub-topic-matrix>article{padding:21px}.bn-hub-topic-matrix h3{font-size:17px}.bn-hub-topic-matrix p{font-size:13px}.bn-hub-flow>article{padding:20px;gap:8px 14px}.bn-hub-flow h3{font-size:16px}.bn-hub-flow p{font-size:12px}.bn-hub-notice{padding:18px 20px}.bn-hub-notice strong{font-size:13px}.bn-hub-notice p{font-size:12px}.bn-hub-answers summary{padding:18px 40px 18px 20px;font-size:14px}.bn-hub-answers summary::after{top:16px;right:17px}.bn-hub-answer-text{padding:0 20px 20px}.bn-hub-answer-text p{font-size:12px}.bn-hub-filter{gap:8px;margin-top:22px}.bn-hub-filter button{font-size:11px;padding:8px 12px}.bn-hub-filter-status{font-size:10px}.bn-hub-other-paths{margin-top:32px;padding:26px 0}.bn-hub-other-paths strong{font-size:14px}.bn-hub-other-paths>div{gap:8px}.bn-hub-other-paths a{font-size:11px;padding:8px 11px}.bn-hub-footer{padding-top:25px}.bn-hub-footer-navigation>nav{font-size:10px;gap:11px 19px}.bn-hub-disclosure p{font-size:10px}}
@media(max-width:360px){.bn-hub-site-frame{padding:0 15px}.bn-hub-top nav a{font-size:9px}.bn-hub-top nav{gap:8px}.bn-hub-hero h1{font-size:29px}.bn-hub-entrances>a{padding:18px}.bn-hub-entrances strong{font-size:17px}.bn-hub-entrances>a>span:last-child{font-size:10px}.bn-hub-module h2{font-size:21px}.bn-hub-spec-card h3{font-size:20px}.bn-hub-filter button{padding:8px 10px;font-size:10px}}
.bn-hub-name,.bn-hub-intent{display:inline-block}
@media(max-width:800px){.bn-hub-spec-card header{flex-wrap:wrap}}
@media(max-width:500px){.bn-hub-name,.bn-hub-intent{display:block}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Preserve usable touch targets in compact portal navigation and filters. */
.bn-hub-top-action{min-height:44px;display:inline-flex;align-items:center;justify-content:center}
.bn-hub-filter button{min-height:44px}
@media(max-width:800px){.bn-hub-top nav a{min-height:44px;display:flex;align-items:center}.bn-hub-top-action{font-size:12px}}
@media(max-width:500px){.bn-hub-top nav a{font-size:12px}}
@media(max-width:360px){.bn-hub-top nav a{font-size:11px}}