/* PG电子：原生 CSS、无需外部依赖 */
:root{--bg:#080A0D;--panel:#0D1015;--card:#12161C;--card2:#171C23;--hover:#1B2129;--white:#F5F7FA;--text:#C7CDD5;--muted:#9098A3;--blue:#6EA8FF;--border:rgba(255,255,255,.09)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-wrap:anywhere}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}a:focus-visible,button:focus-visible{outline:2px solid #8ED8FF;outline-offset:3px}img{max-width:100%}button{font:inherit;cursor:pointer}.container{width:min(1200px,calc(100% - 48px));margin-inline:auto}.site-header{position:relative;z-index:20;background:var(--bg)}.topbar{height:74px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;position:relative;background:rgba(8,10,13,.96);border-bottom:1px solid var(--border)}.brand{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);max-width:calc(100% - 280px)}.media-logo{height:36px;max-width:220px;display:flex;align-items:center;justify-content:center}.media-logo img{height:100%;width:auto;object-fit:contain}.media-logo.media-placeholder{width:150px;min-height:30px;border:1px solid var(--border)}.icon-button{width:44px;height:44px;flex:0 0 auto;background:transparent;border:1px solid var(--border);border-radius:10px;color:var(--white)}.menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px}.menu-toggle span{height:2px;width:19px;background:var(--white);border-radius:2px}.enter-link{padding:7px 17px;background:#5C7CFA;border-radius:999px;color:#fff;font-size:14px;font-weight:700;min-height:42px;display:flex;align-items:center;justify-content:center;white-space:nowrap}.enter-link:hover{color:white;background:#4967DC}.channel-nav{background:#0D1015;border-bottom:1px solid var(--border);overflow-x:auto;scrollbar-width:thin;scrollbar-color:#374255 transparent}.channel-inner{display:flex;align-items:stretch;justify-content:space-between;max-width:1200px;min-width:max-content;margin:auto;height:48px;gap:24px;padding:0 24px}.channel-inner a{display:flex;align-items:center;justify-content:center;white-space:nowrap;font-size:14px;border-bottom:2px solid transparent}.channel-inner a.is-active{color:var(--blue);border-color:var(--blue)}.drawer-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.65);z-index:40;visibility:hidden;pointer-events:none;opacity:0;transition:opacity .22s,visibility .22s}.site-drawer{position:fixed;inset:0 auto 0 0;width:420px;max-width:86vw;background:#0D1015;border-right:1px solid var(--border);z-index:41;visibility:hidden;pointer-events:none;transform:translateX(-101%);transition:transform .22s,visibility .22s;display:flex;flex-direction:column}.drawer-open{overflow:hidden}.drawer-open .drawer-backdrop{visibility:visible;pointer-events:auto;opacity:1}.drawer-open .site-drawer{visibility:visible;pointer-events:auto;transform:translateX(0)}.drawer-top{display:flex;justify-content:space-between;gap:16px;padding:22px;border-bottom:1px solid var(--border)}.drawer-brand p{font-size:13px;color:var(--muted);margin:8px 0 0}.drawer-close{font-size:27px;line-height:1}.drawer-content{padding:4px 22px 26px;overflow-y:auto}.drawer-content section{border-bottom:1px solid var(--border);padding:14px 0}.drawer-content h2{font-size:14px;color:var(--muted);margin:0 0 8px}.drawer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 12px}.drawer-links a{font-size:14px;padding:6px 10px;border-left:2px solid transparent;border-radius:4px}.drawer-links a.is-active{color:var(--blue);border-left-color:var(--blue);background:#171C23}h1,h2,h3{color:var(--white);line-height:1.35;letter-spacing:.01em}h1{font-size:34px;margin:0 0 18px}h2{font-size:26px;margin:0 0 20px}h3{font-size:20px;margin:0 0 12px}p{margin:0 0 16px}.eyebrow{text-transform:uppercase;letter-spacing:.13em;color:#8ED8FF;font-size:12px;font-weight:700;margin-bottom:12px}.section{margin:52px 0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:22px}.section-heading h2{margin:0}.section-heading a,.text-link,.article a{color:var(--blue)}.section-heading a:hover,.text-link:hover,.article a:hover{text-decoration:underline}.muted{color:var(--muted)}.panel{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:24px;min-width:0}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px;min-width:0}.card:hover{border-color:rgba(255,255,255,.16);background:var(--hover)}.card h3{font-size:18px}.card p{font-size:14px;line-height:1.75;color:var(--text)}.card a{color:var(--blue);font-size:14px}.grid-2,.grid-3,.grid-4,.split,.hero,.article-layout,.mobile-feature{display:grid;gap:20px;min-width:0}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.split{grid-template-columns:minmax(0,1.7fr) minmax(0,1fr)}.hero{grid-template-columns: minmax(0,1.25fr) minmax(0,1fr);align-items:center;padding:42px 0 8px;gap:36px}.hero h1{font-size:40px}.hero p{max-width:590px}.hero-actions{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px}.hero-actions a{color:var(--blue);font-weight:700}.media{width:100%;max-width:100%;min-width:0;border-radius:14px;overflow:hidden;background:#0D1015;display:flex;align-items:center;justify-content:center;border:1px solid var(--border)}.media img{display:block;width:100%;height:100%;max-width:100%;object-fit:contain;object-position:center center}.media-wide{height:172px}.media-square{height:158px}.media-banner{height:250px}.media-device{height:330px}.media-placeholder{background:linear-gradient(135deg,#0D1015,#171C23);border:1px solid rgba(255,255,255,.055)}.hero .media{height:300px}.feature-visual .media{height:240px}.media-logo img{height:100%;width:auto}.media-logo{border:0;background:transparent;border-radius:0}.numbered{counter-reset:item}.index-item{display:grid;grid-template-columns:48px minmax(0,1fr);gap:16px;padding:18px 0;border-bottom:1px solid var(--border)}.index-item .num{font-size:18px;color:#8ED8FF;font-weight:700}.index-item h3{font-size:18px;margin-bottom:5px}.index-item p{font-size:15px;margin-bottom:6px}.image-card{overflow:hidden}.image-card .media{margin-bottom:12px}.image-card h3{font-size:17px}.image-card p{font-size:14px}.article-hero{padding:48px 0 16px;border-bottom:1px solid var(--border)}.article-hero p{max-width:800px;font-size:17px}.article-layout{grid-template-columns:minmax(0,1fr) 260px;align-items:start}.article{max-width:820px;min-width:0}.article section{padding:20px 0;border-bottom:1px solid var(--border)}.article section h2{margin-bottom:14px}.article section p{margin-bottom:16px}.aside-list{position:sticky;top:22px}.aside-list h2{font-size:19px}.aside-list a{display:block;padding:10px 0;border-bottom:1px solid var(--border);font-size:14px}.related-links{margin:42px 0}.related-links h2{font-size:22px}.related-grid{display:flex;flex-wrap:wrap;gap:10px}.related-grid a,.topic-links a{border:1px solid var(--border);padding:8px 15px;border-radius:999px;background:var(--panel);font-size:14px}.related-grid a:hover{border-color:var(--blue)}.topic-links{display:flex;flex-wrap:wrap;gap:12px}.wide-quote{border-left:3px solid var(--blue);padding:16px 20px;background:var(--panel);border-radius:0 12px 12px 0}.notice{font-size:14px;color:var(--muted);border:1px solid var(--border);padding:16px;border-radius:12px}.faq details{background:var(--card);border:1px solid var(--border);padding:14px 18px;border-radius:12px;margin-bottom:12px}.faq summary{cursor:pointer;color:var(--white);font-weight:700}.faq details p{padding-top:12px;margin-bottom:0}.site-footer{background:#050608;border-top:1px solid var(--border);padding:48px 0 24px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:30px}.footer-grid h2{font-size:16px}.footer-grid a:not(.footer-brand a){display:block;font-size:14px;margin-bottom:7px}.footer-brand p{font-size:14px;color:var(--muted);margin-top:15px}.footer-bottom{border-top:1px solid var(--border);margin-top:36px;padding-top:18px;display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted)}.footer-bottom p{margin:0}.back-top{position:fixed;right:20px;bottom:20px;z-index:25;border:1px solid var(--border);border-radius:100px;width:42px;height:42px;background:var(--card2);color:var(--white);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .15s}.back-top.is-visible{opacity:1;visibility:visible;pointer-events:auto}.section .card .media{margin-bottom:15px}.highlight{color:var(--blue)}.mobile-feature{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);align-items:center}.mobile-feature .media{max-width:260px;margin:auto}.caption{color:var(--muted);font-size:13px;margin-top:8px}.timeline{border-left:1px solid var(--blue);padding-left:23px}.timeline h3{margin-top:18px}
@media(max-width:1100px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.channel-inner{gap:20px}}
@media(max-width:800px){.container{width:calc(100% - 40px)}.article-layout,.split,.hero,.mobile-feature{grid-template-columns:minmax(0,1fr)}.hero .feature-visual{grid-row:1}.hero{padding-top:25px}.hero .media{height:250px}.aside-list{position:static}.article{max-width:none}.section{margin:36px 0}.section-heading h2,h2{font-size:22px}.article-hero{padding-top:32px}.mobile-feature .media{max-width:240px}}
@media(max-width:520px){body{font-size:15px}.topbar{height:62px;padding:0 16px}.icon-button{width:40px;height:40px}.brand{max-width:calc(100% - 190px)}.media-logo{height:28px;max-width:125px}.enter-link{min-height:38px;padding:5px 10px;font-size:12px}.channel-inner{height:44px;gap:20px;padding:0 16px}.container{width:calc(100% - 32px)}h1{font-size:26px}.hero h1{font-size:29px}.hero .media{height:195px}.grid-3,.grid-2,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.card{padding:13px}.card h3{font-size:16px}.card p{font-size:13px}.media-wide,.media-square{height:135px}.media-banner{height:140px}.media-device{height:300px}.feature-visual .media{height:175px}.panel{padding:17px}.footer-grid{gap:20px}.footer-bottom{display:block}.article-hero p{font-size:15px}.section{margin:32px 0}.section-heading{align-items:start}.section-heading a{font-size:13px}.drawer-content{padding-left:16px;padding-right:16px}.drawer-top{padding:18px}}
@media(max-width:359px){.grid-3.quick-grid{grid-template-columns:1fr}.brand{max-width:calc(100% - 170px)}.media-logo{max-width:99px;height:26px}.enter-link{padding:5px 8px;font-size:11px}.topbar{padding:0 12px}.card{padding:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}