:root{color-scheme:dark;--bg:#111318;--nav:#151820;--panel:#1a1e27;--sub:#222733;--text:#f7f8fa;--body:#d5d8df;--muted:#aeb4c0;--line:rgba(255,255,255,.09);--orange:#f45132;--hover:#ff684e;--gold:#d7a84b}
*{box-sizing:border-box;min-width:0}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.75 system-ui,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none;touch-action:manipulation}button{font:inherit;touch-action:manipulation}a:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:3px}p{margin:0 0 1.15em;overflow-wrap:anywhere}h1,h2,h3{color:var(--text);line-height:1.35;margin:0 0 .72em;font-weight:720}h1{font-size:clamp(30px,3.5vw,42px)}h2{font-size:clamp(23px,2.5vw,28px)}h3{font-size:19px}small,.muted{color:var(--muted)}.container{width:min(1200px,calc(100% - 40px));margin-inline:auto}.skip{position:absolute;left:-9999px;z-index:20000;background:var(--orange);color:#fff;padding:8px}.skip:focus{left:12px;top:6px}.site-header{background:var(--nav);border-bottom:1px solid var(--line);position:relative;z-index:30}.header-main{height:70px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:9px;color:#fff;flex-shrink:0;white-space:nowrap}.brand .media{width:42px;height:42px;flex:0 0 42px;background:transparent}.brand span{display:flex;flex-direction:column;line-height:1.18}.brand strong{font-size:20px;letter-spacing:.02em}.brand small{font-size:10px;letter-spacing:.14em;color:var(--gold);margin-top:5px}.desktop-nav{display:flex;align-items:center;justify-content:center;flex:1;gap:clamp(7px,1.5vw,22px);white-space:nowrap}.desktop-nav a{font-size:14px;padding:12px 6px;position:relative;color:var(--body)}.desktop-nav a:hover,.sub-nav a:hover{color:#fff}.desktop-nav a.selected:after,.sub-nav a.selected:after{content:"";position:absolute;bottom:3px;left:12%;right:12%;height:2px;background:var(--orange)}.register-btn{margin-left:auto;background:var(--orange);color:#fff;border-radius:7px;min-height:42px;min-width:78px;display:grid;place-items:center;font-weight:650}.register-btn:hover{background:var(--hover)}.header-sub{border-top:1px solid var(--line)}.sub-nav{height:37px;display:flex;align-items:center;gap:32px}.sub-nav a{font-size:13px;white-space:nowrap;position:relative;color:var(--muted);line-height:37px}.menu-toggle{display:none}.mobile-drawer,.drawer-mask{display:none}main{padding-top:34px;padding-bottom:72px;min-height:65vh}.eyebrow{text-transform:uppercase;color:var(--gold);font-size:12px;letter-spacing:.15em;margin-bottom:14px;font-weight:650}.lead{color:var(--body);font-size:17px;line-height:1.85;max-width:790px}.intro{padding:28px 0 23px;border-bottom:1px solid var(--line);margin-bottom:32px}.intro p{max-width:870px}.section{margin-top:48px}.section-header{display:flex;align-items:baseline;justify-content:space-between;gap:14px;margin-bottom:20px}.section-header h2{margin:0}.kicker{color:var(--orange);font-size:13px;letter-spacing:.08em}.text-link{color:var(--hover);text-underline-offset:5px;text-decoration:underline;text-decoration-color:rgba(244,81,50,.4)}.text-link:hover{text-decoration-color:currentColor}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:12px;background:#12151c;aspect-ratio:16/9}.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}.media--portrait{aspect-ratio:4/5}.media--app{aspect-ratio:3/4;max-width:360px;margin-inline:auto}.media--logo{aspect-ratio:auto;overflow:visible}.media--logo img{position:static;width:100%;height:100%;object-fit:contain}.media--banner{aspect-ratio:auto;height:clamp(220px,24vw,300px)}.media-placeholder{position:absolute;inset:0;display:block;background:linear-gradient(135deg,#202531,#11151b)}.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px}.soft-panel{background:var(--sub);border-radius:12px;padding:20px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.channel-card{padding:23px;border:1px solid var(--line);border-top:3px solid var(--orange);border-radius:10px;background:var(--panel)}.channel-card:nth-child(2){border-top-color:var(--gold)}.channel-card:nth-child(3){border-top-color:#67788e}.channel-card h3{margin:3px 0 12px}.channel-card a,.link-row a,.related a{color:var(--hover)}.feature{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:36px}.feature.reverse .media{order:2}.feature p{max-width:640px}.picture-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}.picture-grid article{background:var(--panel);border-radius:12px;overflow:hidden;border:1px solid var(--line)}.picture-grid .media{border-radius:0}.picture-grid .copy{padding:16px}.picture-grid h3{font-size:18px}.picture-grid p{font-size:14px;line-height:1.7}.link-row{display:flex;flex-wrap:wrap;gap:12px 25px;margin-top:18px}.link-row a{border-bottom:1px solid rgba(244,81,50,.5);padding:8px 0}.read-list{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}.read-list li{border-bottom:1px solid var(--line);padding:16px 0;display:flex;justify-content:space-between;gap:16px}.read-list a{color:#fff}.read-list span{color:var(--muted);font-size:13px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:48px;align-items:start}.article-body h2{padding-top:25px;margin-top:25px;border-top:1px solid var(--line)}.article-body h3{margin-top:21px}.article-body .media{margin:22px 0}.aside{background:var(--panel);padding:20px;border-radius:12px;border:1px solid var(--line);position:sticky;top:20px}.aside h2{font-size:18px}.aside a{display:block;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}.aside a:hover{color:var(--hover)}.related{border-top:1px solid var(--line);padding-top:25px;margin-top:40px}.related h2{font-size:23px}.related a{display:inline-block;margin:5px 18px 5px 0}.prose{max-width:840px;margin:auto}.prose h2{border-top:1px solid var(--line);margin-top:35px;padding-top:22px}.prose li,.article-body li{margin-bottom:9px}.number-steps{counter-reset:step;list-style:none;margin:0;padding:0}.number-steps li{counter-increment:step;padding:18px 0 18px 58px;position:relative;border-bottom:1px solid var(--line)}.number-steps li:before{content:counter(step,decimal-leading-zero);position:absolute;left:0;top:16px;color:var(--gold);font-weight:700}.faq-list details{border-bottom:1px solid var(--line);padding:17px 0}.faq-list summary{cursor:pointer;color:var(--text);font-weight:700;min-height:40px}.faq-list details p{margin:12px 0 0}.note{border-left:3px solid var(--orange);padding:14px 20px;background:var(--panel);margin:25px 0}.mini-index{display:flex;gap:12px;flex-wrap:wrap;margin:25px 0}.mini-index a{padding:9px 15px;border:1px solid var(--line);border-radius:30px;background:var(--panel)}.mini-index a:hover{border-color:var(--orange)}.gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.gallery figure{margin:0;padding:15px;background:var(--panel);border:1px solid var(--line);border-radius:12px}.gallery figcaption{padding:14px 0 2px;font-size:14px}.gallery strong{display:block;color:var(--text);font-size:17px;margin-bottom:8px}.gallery .media{margin:0}.table-wrap{overflow-x:auto}.info-table{border-collapse:collapse;width:100%;min-width:580px}.info-table th,.info-table td{padding:16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}.info-table th{color:var(--text);background:var(--panel)}.carousel{position:relative;margin-bottom:25px}.slide[hidden]{display:none!important}.slide .media{border-radius:14px}.slider-controls{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:12px}.slider-controls button{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:8px;min-width:44px;min-height:44px;cursor:pointer}.slider-dots{display:flex;gap:7px}.slider-dots button{min-width:32px;width:32px;height:32px;min-height:32px;position:relative;border:0;background:transparent}.slider-dots button:after{content:"";width:8px;height:8px;background:#6e737d;border-radius:50%;position:absolute;top:12px;left:12px}.slider-dots button[aria-current="true"]:after{background:var(--orange)}.site-footer{background:var(--nav);border-top:1px solid var(--line);padding:42px 0 24px}.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.footer-grid h2{font-size:17px}.footer-grid a{display:block;color:var(--muted);font-size:14px;margin:6px 0}.footer-grid a:hover{color:var(--hover)}.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;gap:16px;padding-top:26px;margin-top:25px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.footer-bottom p{margin:0}.footer-brand{display:flex;gap:9px;align-items:center;margin-right:auto}.footer-brand .media{width:28px;height:28px;background:transparent}.mobile-bottom{display:none}
@media(max-width:1024px){.desktop-nav,.header-sub{display:none}.header-main{height:62px;justify-content:space-between;gap:8px}.menu-toggle{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px;flex:0 0 40px;width:40px;height:44px;border:0;background:transparent;padding:5px;color:#fff;cursor:pointer}.menu-toggle span{display:block;width:21px;height:2px;background:currentColor}.header-main .brand{margin:auto}.header-main .brand .media{width:37px;height:37px;flex-basis:37px}.register-btn{min-width:66px;min-height:40px;margin-left:0;font-size:14px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);max-width:100%;height:100dvh;overflow-y:auto;background:#151820;color:#f7f8fa;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;visibility:hidden}.mobile-drawer.is-open{transform:translateX(0);visibility:visible}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:11000;opacity:0;pointer-events:none}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--line)}.drawer-close{background:var(--sub);border:0;border-radius:8px;color:#fff;font-size:27px;width:44px;height:44px;cursor:pointer}.drawer-section{padding:15px 20px;border-bottom:1px solid var(--line)}.drawer-section h2{font-size:13px;color:var(--gold);margin:0 0 8px}.drawer-section a{display:block;padding:7px 8px;min-height:40px;border-radius:7px;font-size:15px}.drawer-section a:hover{background:var(--sub)}.drawer-open{overflow:hidden}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:100;display:grid;grid-template-columns:repeat(4,1fr);background:#151820;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:55px;display:grid;place-items:center;font-size:13px}.mobile-bottom a[aria-current=page]{color:var(--hover)}main{padding-bottom:calc(100px + env(safe-area-inset-bottom))}.article-layout{grid-template-columns:1fr;gap:25px}.aside{position:static}.gallery{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.container{width:calc(100% - 32px)}body{font-size:15.5px}.lead{font-size:16px}.section{margin-top:36px}.intro{padding:12px 0 20px;margin-bottom:25px}h1{font-size:clamp(26px,7vw,30px)}h2{font-size:22px}.grid-3,.grid-2,.feature{grid-template-columns:1fr}.feature.reverse .media{order:0}.feature{gap:20px}.picture-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.picture-grid .copy{padding:12px}.picture-grid h3{font-size:16px}.picture-grid p{font-size:13px}.media--banner{height:clamp(140px,40vw,180px)}.panel{padding:19px}.footer-grid{grid-template-columns:1fr;gap:14px}.footer-bottom{display:block}.footer-bottom p{margin:9px 0}.gallery .media--portrait{max-height:260px}.read-list li{display:block}.read-list span{display:block;margin-top:5px}.slider-controls{gap:7px}}
@media(max-width:360px){.header-main .brand strong{font-size:17px}.header-main .brand small{font-size:9px}.header-main .brand{gap:5px}.header-main .brand .media{width:31px;height:31px;flex-basis:31px}.menu-toggle{width:38px;flex-basis:38px}.register-btn{min-width:59px}.picture-grid{grid-template-columns:1fr}.gallery{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}