:root{color-scheme:dark;--bg:#111318;--nav:#151820;--panel:#1a1e27;--panel2:#222733;--text:#f7f8fa;--body:#d5d8df;--muted:#aeb4c0;--line:rgba(255,255,255,.09);--accent:#f45132;--hover:#ff684e;--gold:#d7a84b}*,*::before,*::after{box-sizing:border-box}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;cursor:pointer;touch-action:manipulation}a:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:3px}p{margin:0 0 1.2em}h1,h2,h3{color:var(--text);line-height:1.35;margin:0 0 .65em;overflow-wrap:anywhere}h1{font-size:clamp(29px,3.3vw,42px)}h2{font-size:clamp(23px,2.5vw,28px)}h3{font-size:19px}ul,ol{padding-left:1.35em}li{margin:.35em 0}img{max-width:100%}.wrap{width:min(1200px,calc(100% - 40px));margin-inline:auto;min-width:0}.skip-link{position:absolute;top:-100px;z-index:20000;background:var(--accent);padding:9px 15px}.skip-link:focus{top:0}.site-header{background:var(--nav);border-bottom:1px solid var(--line)}.header-top{height:75px;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;gap:10px;min-width:0;flex-shrink:0;color:var(--text);line-height:1.15}.brand .media--logo{width:44px;height:44px;flex:none}.brand strong{display:block;font-size:19px;white-space:nowrap}.brand small{display:block;font-size:10px;letter-spacing:1.5px;color:var(--muted);margin-top:4px}.primary-nav{display:flex;align-items:center;justify-content:center;flex:1;min-width:0;gap:clamp(12px,2vw,28px)}.primary-nav a,.secondary-nav a{white-space:nowrap;min-height:40px;display:inline-flex;align-items:center;color:var(--muted);font-size:14px;position:relative}.primary-nav a:hover,.secondary-nav a:hover,.primary-nav a[aria-current],.secondary-nav a[aria-current]{color:var(--text)}.primary-nav a[aria-current]:after,.secondary-nav a[aria-current]:after{content:"";position:absolute;height:2px;background:var(--accent);bottom:3px;left:0;right:0}.register{background:var(--accent);color:#fff;display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 21px;border-radius:8px;font-weight:700;flex:none}.register:hover{background:var(--hover)}.secondary-nav{border-top:1px solid var(--line)}.secondary-nav .wrap{display:flex;align-items:center;justify-content:center;gap:40px;min-height:44px}.menu-toggle{display:none}.mobile-drawer,.drawer-mask{display:none}.main-content{padding-block:30px 68px}.section{margin-top:56px}.eyebrow{display:block;color:var(--gold);letter-spacing:2px;font-size:12px;font-weight:700;margin-bottom:10px}.lead{font-size:18px;color:var(--muted);max-width:850px}.intro{max-width:850px;margin-bottom:30px}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:16px}.section-head a,.text-link{color:var(--hover);font-weight:600}.text-link:hover,.section-head a:hover{text-decoration:underline}.line-list{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}.line-list li{margin:0;border-bottom:1px solid var(--line)}.line-list a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 4px;min-height:48px}.line-list a:hover{color:var(--hover)}.line-list a:after{content:'→';color:var(--accent)}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:12px;background:#12151c;aspect-ratio:16/9;min-width:0}.media>img{position:absolute;inset:0;width:100%;max-width:100%;height:100%;object-fit:contain;object-position:center center;display:block}.media--portrait{aspect-ratio:4/5}.media--square{aspect-ratio:1}.media--app{aspect-ratio:3/4;max-width:360px;margin-inline:auto}.media--logo{aspect-ratio:auto;overflow:visible;background:transparent}.media--logo img{position:static;width:100%;height:100%;object-fit:contain}.media-placeholder{display:block;width:100%;height:100%;background:linear-gradient(135deg,#171c25,#242b39);border:1px solid var(--line);border-radius:inherit}.carousel .slide[hidden]{display:none}.carousel .media--hero{height:clamp(220px,24vw,300px);aspect-ratio:auto}.carousel-controls{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:12px}.carousel-controls button{background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:7px;min-height:40px;min-width:42px}.carousel-controls button:hover{border-color:var(--accent)}.carousel-dots{display:flex;gap:9px;align-items:center}.carousel-dots button{width:11px;min-width:11px;height:11px;min-height:11px;padding:0;border-radius:50%;background:#7c8492}.carousel-dots button[aria-pressed=true]{background:var(--accent)}.channel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.channel-item{border-top:3px solid var(--accent);background:var(--panel);padding:25px;border-radius:4px 4px 12px 12px;min-width:0}.channel-item:nth-child(2){border-color:var(--gold)}.channel-item:nth-child(3){border-color:#7f9aaf}.channel-item h3 a:hover{color:var(--hover)}.channel-item p{color:var(--muted)}.feature-split{display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:38px}.feature-split>*{min-width:0}.feature-split.reverse{grid-template-columns:1fr 1.1fr}.figure-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.figure-grid article,.gallery-grid article{min-width:0}.figure-grid h3,.gallery-grid h3{margin-top:12px}.figure-grid p,.gallery-grid p{color:var(--muted);font-size:14px}.duo{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:25px}.duo>*{min-width:0}.pane{background:var(--panel);border:1px solid var(--line);padding:25px;border-radius:12px}.note{padding:19px 23px;border-left:3px solid var(--gold);background:var(--panel);color:var(--body);margin:28px 0}.page-hero{padding:32px 0 20px;border-bottom:1px solid var(--line);margin-bottom:30px}.page-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:36px;align-items:start}.page-layout>*{min-width:0}.page-aside{background:var(--panel);padding:23px;border-radius:12px;position:sticky;top:15px}.page-aside h2{font-size:20px}.page-aside a{display:block;min-height:40px;padding:7px 0;border-bottom:1px solid var(--line);color:var(--muted)}.page-aside a:hover{color:var(--hover)}.reading-section{margin:0 0 35px;scroll-margin-top:25px}.reading-section h2{padding-bottom:11px;border-bottom:1px solid var(--line)}.reading-section h3{margin-top:20px}.reading-section p{line-height:1.9}.reading-section .media{margin:18px 0 21px}.related{margin-top:45px;border-top:1px solid var(--line);padding-top:24px}.related a{display:inline-flex;align-items:center;min-height:43px;margin:4px 12px 4px 0;color:var(--hover)}.gallery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px 20px}.gallery-filter{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0 35px}.gallery-filter a{min-height:42px;border:1px solid var(--line);background:var(--panel2);border-radius:7px;padding:7px 14px}.gallery-group{margin:36px 0 55px;scroll-margin-top:15px}.gallery-group h2{border-bottom:1px solid var(--line);padding-bottom:12px}.steps{counter-reset:step;list-style:none;padding:0}.steps>li{counter-increment:step;position:relative;padding:0 0 25px 53px;border-left:1px solid var(--line);margin:0 0 0 18px;min-height:70px}.steps>li:before{content:counter(step);position:absolute;left:-18px;top:0;width:36px;height:36px;background:var(--accent);color:white;display:grid;place-items:center;border-radius:50%;font-weight:700}.steps h3{margin-bottom:8px}.article-index{border-block:1px solid var(--line);margin:25px 0}.article-index a{display:block;padding:13px;border-bottom:1px solid var(--line);min-height:46px}.article-index a:last-child{border:0}.qa{padding:22px 0;border-bottom:1px solid var(--line)}.qa h3{margin:0 0 8px}.qa p{margin:0}.table-scroll{overflow-x:auto}.info-table{width:100%;border-collapse:collapse;min-width:540px}.info-table th,.info-table td{border-bottom:1px solid var(--line);text-align:left;padding:15px;vertical-align:top}.info-table th{color:var(--text);background:var(--panel2)}.site-footer{background:var(--nav);border-top:1px solid var(--line);padding:40px 0 20px}.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:35px}.footer-grid>*{min-width:0}.footer-grid h2{font-size:17px}.footer-grid a:not(.brand){display:block;min-height:35px;color:var(--muted)}.footer-grid a:hover{color:var(--hover)}.footer-brand{margin-bottom:18px}.footer-grid p{font-size:14px;color:var(--muted)}.footer-bottom{border-top:1px solid var(--line);padding-top:19px;margin-top:25px;display:flex;gap:15px;justify-content:space-between;color:var(--muted);font-size:13px}.mobile-bottom{display:none}
@media(max-width:1024px){.wrap{width:calc(100% - 48px)}.primary-nav,.secondary-nav{display:none}.header-top{justify-content:space-between;height:66px;gap:9px}.menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;border:1px solid var(--line);background:transparent;border-radius:7px;width:44px;height:44px;padding:0;flex:none}.menu-toggle span{height:2px;width:20px;background:var(--text);display:block}.header-top .brand{margin-inline:auto}.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;justify-content:space-between;align-items:center;padding:16px;border-bottom:1px solid var(--line)}.drawer-close{font-size:28px;background:transparent;border:0;color:white;width:44px;height:44px}.drawer-group{padding:11px 20px 16px;border-bottom:1px solid var(--line)}.drawer-group p{color:var(--gold);font-size:13px;font-weight:700;letter-spacing:1px;margin:0 0 5px}.drawer-group a{display:block;padding:7px 0;min-height:42px;border-bottom:1px solid rgba(255,255,255,.045)}body.drawer-open{overflow:hidden}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page-layout{grid-template-columns:minmax(0,1fr) 230px;gap:22px}.figure-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mobile-bottom{display:flex;position:fixed;inset:auto 0 0;z-index:9000;background:#151820;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);height:calc(57px + env(safe-area-inset-bottom))}.mobile-bottom a{display:grid;place-items:center;flex:1;min-height:55px;font-size:14px}.mobile-bottom a:last-child{color:var(--hover);font-weight:700}.site-footer{padding-bottom:calc(28px + 57px + env(safe-area-inset-bottom))}}
@media(max-width:700px){.wrap{width:calc(100% - 32px)}body{font-size:15.5px}.lead{font-size:16px}.main-content{padding-top:18px}.section{margin-top:42px}.channel-grid,.feature-split,.feature-split.reverse,.duo,.page-layout{grid-template-columns:1fr}.feature-split{gap:16px}.channel-item{padding:20px}.page-aside{position:static}.gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 12px}.footer-grid{grid-template-columns:1fr;gap:17px}.footer-bottom{flex-direction:column}.carousel .media--hero{height:clamp(140px,40vw,180px)}.page-hero{padding-top:17px}.figure-grid{gap:12px}.figure-grid h3,.gallery-grid h3{font-size:17px}.figure-grid p,.gallery-grid p{font-size:14px}.gallery-grid .media--portrait{max-height:260px;aspect-ratio:4/5}.section-head{align-items:start}.top-register{min-height:42px;padding:0 13px}.header-top .brand .media--logo{width:36px;height:36px}.header-top .brand strong{font-size:16px}.header-top .brand small{font-size:8px;letter-spacing:.7px}.header-top{gap:5px}.pane{padding:18px}.reading-section{margin-bottom:30px}}
@media(max-width:360px){.header-top .brand{gap:5px}.header-top .brand .media--logo{width:30px;height:34px}.header-top .brand strong{font-size:15px}.menu-toggle{width:41px;height:41px}.top-register{padding:0 11px}.gallery-grid{grid-template-columns:1fr}.gallery-grid .media--portrait{max-width:260px;margin-inline:auto}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.mobile-drawer{transition:none}}