:root{--bg:#111722;--panel:#18202D;--panel2:#1E2736;--panel3:#253044;--gold:#F0D89A;--gold2:#E4C77D;--text:#E8EDF6;--muted:#BAC3D2;--soft:#8F9AAF;--footer:#0B1018;--line:rgba(240,216,154,.14);--shadow:0 16px 42px rgba(0,0,0,.26)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}body.drawer-open{overflow:hidden}img{max-width:100%}a{color:inherit;text-decoration:none}button,input{font:inherit}.container{width:min(1280px,calc(100% - 44px));margin:0 auto}.site-header{position:sticky;top:0;z-index:9999;width:100%;background:#111722;box-shadow:0 10px 30px rgba(0,0,0,.24)}.header-inner{max-width:1280px;min-height:72px;margin:0 auto;padding:0 22px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:24px}.brand-logo,.mobile-logo,.drawer-logo,.footer-logo{display:inline-flex;align-items:center}.brand-logo img,.mobile-logo img,.drawer-logo img,.footer-logo img{height:46px;width:auto;max-width:165px;object-fit:contain}.logo-placeholder{display:inline-flex;align-items:center;justify-content:center;height:46px;min-width:126px;padding:0 14px;border:1px solid var(--line);border-radius:12px;color:var(--gold);font-size:20px;font-weight:700;letter-spacing:.08em}.main-nav{display:flex;justify-content:center;align-items:center;gap:clamp(12px,1.7vw,26px);min-width:0}.nav-link{white-space:nowrap;color:var(--muted);font-size:15px;padding:9px 0;position:relative}.nav-link:hover,.nav-link.is-active{color:var(--gold)}.nav-link.is-active:after{content:"";position:absolute;left:20%;right:20%;bottom:0;height:2px;border-radius:999px;background:var(--gold)}.header-actions{display:flex;gap:10px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 17px;border-radius:10px;font-weight:700;white-space:nowrap}.btn-dark{background:var(--panel2);color:var(--text);border:1px 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@media(max-width:1100px){.header-inner{gap:14px;padding:0 16px}.main-nav{gap:12px}.nav-link{font-size:14px}.header-actions .btn{padding:0 13px}.category-inner{padding:0 16px}.topic-grid{grid-template-columns:repeat(3,1fr)}.channel-mosaic{grid-template-columns:1.1fr .9fr}.channel-card:first-child{grid-row:auto;grid-column:span 2}.reading-line{grid-template-columns:repeat(3,1fr)}.reading-line a:nth-child(3n){border-right:0}.article-layout{grid-template-columns:1fr}.article-aside{position:static;grid-template-columns:repeat(2,1fr)}}
@media(max-width:900px){.desktop-header{display:none}.mobile-header{display:grid}.container{width:min(100% - 32px,1280px)}.section{padding:64px 0}.page-hero{padding:54px 0 42px}.page-hero .hero-inner{grid-template-columns:1fr;gap:24px}.split,.split-wide,.app-feature{grid-template-columns:1fr}.guide-grid{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,1fr)}.channel-mosaic{grid-template-columns:1fr 1fr}.service-pair{grid-template-columns:1fr}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}.desktop-tools{display:none}.feature-strip{grid-template-columns:1fr}.info-row{grid-template-columns:1fr 1fr}.media-poster{aspect-ratio:16/8;min-height:220px;max-height:320px}.carousel-copy{left:18px;right:18px;bottom:18px;max-width:none}.footer-bottom{flex-direction:column}.compact-columns{columns:1}}
@media(max-width:640px){body{padding-bottom:72px}.container{width:min(100% - 28px,1280px)}.mobile-header{grid-template-columns:74px 1fr 86px;padding:7px 10px}.mobile-logo img{height:39px;max-width:126px}.mobile-register{padding:0 10px;font-size:12px}.section{padding:52px 0}.section-tight{padding:44px 0}.page-hero{padding:46px 0 34px}h1{font-size:clamp(30px,9vw,36px)}h2{font-size:27px}.lead{font-size:16px}.prose p{font-size:16px}.guide-main,.guide-small{padding:22px}.reading-line{grid-template-columns:1fr 1fr}.reading-line a{min-height:100px;border-right:1px solid rgba(240,216,154,.09);border-bottom:1px solid rgba(240,216,154,.09)}.reading-line a:nth-child(2n){border-right:0}.reading-line a:nth-last-child(-n+2){border-bottom:0}.channel-mosaic{grid-template-columns:1fr}.channel-card:first-child{grid-column:auto}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.topic-card .topic-body{padding:14px}.topic-card h3{font-size:16px}.topic-card p{font-size:12px}.app-gallery{grid-template-columns:1fr}.feedback-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/-1}.footer-grid>div:last-child{grid-column:auto}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9000;display:grid;grid-template-columns:repeat(5,1fr);min-height:58px;background:#0B1018;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{display:grid;place-items:center;color:var(--muted);font-size:12px}.mobile-bottom a:hover{color:var(--gold)}.media-poster{aspect-ratio:16/10;min-height:190px;max-height:280px}.media-topic{min-height:150px;max-height:190px}.media-main{min-height:210px;max-height:280px}.carousel-copy{position:relative;left:auto;right:auto;bottom:auto;margin-top:10px;background:var(--panel);backdrop-filter:none}.carousel-copy h2{font-size:22px}.article-aside{grid-template-columns:1fr}.info-row{grid-template-columns:1fr}.simple-list a,.simple-list .list-item{align-items:flex-start;flex-direction:column;gap:4px}.footer-bottom{padding-bottom:8px}.contact-step{grid-template-columns:38px 1fr}.contact-step:before{width:38px;height:38px}}
@media(max-width:390px){.mobile-header{grid-template-columns:68px 1fr 82px}.mobile-logo img{max-width:116px}.mobile-register{padding:0 8px}.topic-grid{gap:10px}.topic-card .topic-body{padding:12px}.container{width:min(100% - 24px,1280px)}}