:root{color-scheme:dark;--bg:#111318;--nav:#151820;--panel:#1A1E27;--sub:#222733;--ink:#F7F8FA;--body:#D5D8DF;--muted:#AEB4C0;--line:rgba(255,255,255,.09);--hot:#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;overflow-wrap:anywhere}button{font:inherit;touch-action:manipulation;cursor:pointer}a:focus-visible,button:focus-visible{outline:3px solid var(--gold);outline-offset:3px}p{margin:0 0 1.15em}h1,h2,h3{line-height:1.35;color:var(--ink);letter-spacing:.01em}h1{font-size:clamp(30px,3.1vw,42px);margin:0 0 18px}h2{font-size:clamp(23px,2.2vw,28px);margin:0 0 18px}h3{font-size:19px;margin:0 0 12px}.container{width:min(1200px,calc(100% - 40px));margin-inline:auto}.main-content{padding-block:32px 76px;min-height:65vh}.site-header{background:var(--nav);border-bottom:1px solid var(--line)}.topbar{height:74px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:9px;white-space:nowrap;flex:none}.brand-icon{width:42px;height:42px;display:block}.brand-text{display:flex;flex-direction:column;line-height:1.15}.brand-text b{font-size:22px;color:#fff}.brand-text small{font-size:10px;letter-spacing:.17em;color:var(--gold);margin-top:5px}.primary-nav{margin-left:auto;display:flex;align-items:center;gap:clamp(7px,1.6vw,23px)}.primary-nav a,.secondary-nav a{display:inline-flex;min-height:44px;align-items:center;white-space:nowrap;font-size:14px;position:relative}.primary-nav a:hover,.secondary-nav a:hover,.primary-nav a.active,.secondary-nav a.active{color:#fff}.primary-nav a.active:after,.secondary-nav a.active:after{content:"";height:2px;background:var(--hot);position:absolute;left:0;right:0;bottom:4px}.register{flex:none;background:var(--hot);border-radius:8px;color:white;font-weight:700;min-height:42px;min-width:70px;display:grid;place-items:center;padding:0 16px}.register:hover{background:var(--hover)}.subbar{border-top:1px solid var(--line);background:#171b23}.secondary-nav{display:flex;gap:30px}.secondary-nav a{font-size:13px;color:var(--muted);min-height:39px}.menu-toggle{display:none}.mobile-drawer,.drawer-mask{display:none}.drawer-open{overflow:hidden}.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;border-radius:0}.media--logo img{position:static;width:100%;height:100%;object-fit:contain}.media-empty{position:absolute;inset:0;background:linear-gradient(140deg,#1a1f29,#232936)}.media--logo .media-empty{background:#252b36;border-radius:8px}.eyebrow{font-size:12px;color:var(--gold);letter-spacing:.2em;text-transform:uppercase;font-weight:700;margin-bottom:12px}.intro{font-size:17px;color:var(--muted);max-width:850px}.page-header{padding:25px 0 36px;border-bottom:1px solid var(--line);margin-bottom:32px}.page-header .intro{margin:0}.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:36px;align-items:start}.article-content{min-width:0}.article-section{padding:0 0 25px;margin-bottom:28px;border-bottom:1px solid var(--line)}.article-section h2{padding-left:14px;border-left:3px solid var(--hot)}.article-section p{color:var(--body)}.side-panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;position:sticky;top:18px}.side-panel h2{font-size:18px}.side-panel a{display:block;border-top:1px solid var(--line);padding:10px 0;color:var(--muted);min-height:44px}.side-panel a:hover,.text-link:hover{color:var(--hover)}.feature-media{margin:0 0 30px}.feature-media figcaption,.gallery-card figcaption{font-size:13px;color:var(--muted);padding-top:10px}.feature-media .media{max-height:470px}.related{padding:25px;background:var(--panel);border:1px solid var(--line);border-radius:12px;margin-top:28px}.related h2{font-size:21px}.link-row{display:flex;gap:12px;flex-wrap:wrap}.link-row a,.outline-link{display:inline-flex;min-height:44px;align-items:center;padding:7px 14px;border:1px solid rgba(244,81,50,.45);border-radius:8px;color:#fff}.link-row a:hover,.outline-link:hover{background:#42271f}.columns-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:24px}.panel h2{font-size:23px}.panel p:last-child{margin-bottom:0}.lead-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.lead-card{padding:24px;background:var(--panel);border-top:3px solid var(--hot);border-radius:9px}.lead-card:nth-child(2){border-color:var(--gold)}.lead-card:nth-child(3){border-color:#6a94b8}.lead-card h2{font-size:23px}.lead-card a{color:#fff;font-weight:600;border-bottom:1px solid var(--hot);padding-bottom:4px}.home-section{margin:54px 0}.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:16px}.section-heading a{color:var(--gold)}.split-feature{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center}.split-feature .media{aspect-ratio:16/9}.gallery-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.gallery-card{margin:0;background:var(--panel);border:1px solid var(--line);padding:12px;border-radius:12px}.gallery-card h3{margin:14px 0 8px}.gallery-card p{font-size:14px;color:var(--muted);margin:0 0 8px}.reading-list{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.reading-list a{border-bottom:1px solid var(--line);padding:12px 0;min-height:44px;color:var(--ink)}.reading-list a:hover{color:var(--hover)}.notice{border-left:3px solid var(--gold);padding:20px 24px;background:#23232a;border-radius:0 8px 8px 0}.faq-item{margin:0 0 24px}.faq-item h3{font-size:18px}.faq-item p{color:var(--muted)}.carousel{position:relative;margin:0 0 26px}.carousel-stage{border-radius:14px;overflow:hidden;background:#131720}.slide{height:clamp(220px,24vw,300px)}.slide .media{border-radius:0;height:100%;aspect-ratio:auto}.slide[hidden]{display:none!important}.carousel-controls{display:flex;align-items:center;justify-content:space-between;margin-top:10px}.carousel-prev,.carousel-next{border:1px solid var(--line);background:var(--panel);color:#fff;border-radius:8px;min-width:44px;min-height:44px}.carousel-dots{display:flex;gap:9px}.carousel-dot{width:22px;height:22px;padding:0;border:0;background:transparent;display:grid;place-items:center}.carousel-dot:after{content:"";width:9px;height:9px;border-radius:100%;background:#667080}.carousel-dot.selected:after{background:var(--hot)}.index-strip{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}.index-strip a{padding:7px 13px;min-height:42px;border-radius:8px;background:var(--sub)}.index-strip a:hover{background:#3a4352}.wide-article{max-width:880px;margin:auto}.wide-article .article-section{margin-bottom:34px}.visual-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:20px 0 34px}.visual-strip .media{aspect-ratio:4/5;max-width:360px}.steps{counter-reset:items}.steps .article-section{counter-increment:items}.steps .article-section h2:before{content:counter(items,decimal-leading-zero)'  ';color:var(--gold);font-size:15px}.topic-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.topic-gallery .gallery-card p{font-size:15px;line-height:1.7}.gallery-group{margin-top:48px}.site-footer{background:#151820;border-top:1px solid var(--line);padding:45px 0 24px}.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:35px}.footer-grid h2{font-size:17px;color:#fff;margin:6px 0 12px}.footer-grid a{display:block;color:var(--muted);font-size:14px;min-height:36px}.footer-grid a:hover{color:#fff}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}.footer-brand .media{width:35px;height:35px}.footer-brand small{font-size:10px;color:var(--gold);display:block;letter-spacing:.1em}.footer-bottom{border-top:1px solid var(--line);padding-top:24px;margin-top:30px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.footer-bottom p{margin:0}.bottom-nav{display:none}#main-content a:not(.outline-link):not(.link-row a):hover{text-decoration-color:var(--hot)}
@media(max-width:1024px){.primary-nav,.subbar{display:none}.topbar{height:65px;justify-content:space-between;gap:10px}.menu-toggle{display:grid;place-items:center;flex:0 0 44px;width:44px;height:44px;border:0;color:white;background:transparent;font-size:24px}.brand{margin:auto}.register{min-width:64px;padding:0 10px}.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:14px 20px;border-bottom:1px solid var(--line)}.drawer-close{background:transparent;border:0;color:white;font-size:24px;min-height:44px;min-width:44px}.drawer-brand{display:flex;align-items:center;gap:12px;padding:15px 20px}.drawer-brand .media{height:34px;width:34px}.mobile-drawer nav{padding:0 18px 30px}.mobile-drawer nav h2{color:var(--gold);font-size:13px;letter-spacing:.12em;margin:15px 0 4px}.mobile-drawer nav a{display:block;color:#e5e7ec;padding:9px 12px;min-height:44px;border-bottom:1px solid var(--line)}.mobile-drawer nav a:hover{color:#fff;background:#222733}.bottom-nav{position:fixed;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(4,1fr);background:#171b23;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);z-index:1000}.bottom-nav a{display:grid;place-items:center;min-height:54px;font-size:14px;color:white}.bottom-nav a:last-child{color:#ff8a73;font-weight:700}.main-content{padding-bottom:calc(96px + env(safe-area-inset-bottom))}.footer-bottom{padding-bottom:calc(62px + env(safe-area-inset-bottom))}.content-layout{grid-template-columns:minmax(0,1fr)}.side-panel{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){.container{width:calc(100% - 32px)}body{font-size:15.5px}.main-content{padding-top:23px}.brand-icon{width:34px;height:34px}.brand-text b{font-size:19px}.brand-text small{font-size:8px}.lead-grid,.columns-2,.split-feature,.reading-list,.topic-gallery{grid-template-columns:1fr}.gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-gallery .gallery-card .media--portrait{max-height:260px;aspect-ratio:4/5}.gallery-card{padding:10px}.gallery-card p{font-size:13px}.home-section{margin:38px 0}.page-header{padding-top:10px;margin-bottom:22px}.intro{font-size:15.5px}.panel{padding:19px}.slide{height:clamp(140px,40vw,180px)}.footer-grid{grid-template-columns:1fr;gap:22px}.footer-brand{margin-bottom:14px}.footer-bottom{display:block}.footer-bottom p{margin-bottom:10px}.visual-strip{grid-template-columns:1fr}.section-heading{align-items:start;flex-direction:column}.article-section{margin-bottom:22px;padding-bottom:20px}.carousel{margin-bottom:14px}}
@media(max-width:360px){.topbar{gap:3px}.register{min-width:58px;padding:0 7px}.menu-toggle{flex-basis:40px;width:40px}.brand{gap:5px}.brand-icon{width:30px;height:30px}.brand-text b{font-size:17px}.brand-text small{font-size:7px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}