/* PG电子 — independent editorial website, no external resources */
:root{color-scheme:dark;--bg:#080A0D;--panel:#0D1015;--card:#12161C;--secondary:#171C23;--hover:#1B2129;--white:#F5F7FA;--text:#C7CDD5;--muted:#9098A3;--blue:#5C7CFA;--bright:#6EA8FF;--ice:#8ED8FF;--line:rgba(255,255,255,.09);--line2:rgba(255,255,255,.16)}*{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}a{color:var(--bright);text-decoration:none}a:hover{color:var(--ice)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--ice);outline-offset:4px}h1,h2,h3,p,figure{margin-top:0}h1,h2,h3{color:var(--white);line-height:1.36}h1{font-size:35px;letter-spacing:-.035em}h2{font-size:26px;letter-spacing:-.02em}h3{font-size:19px}p{margin-bottom:17px}figure{margin:0}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center}button{font:inherit;cursor:pointer}.container{width:min(1200px,calc(100% - 48px));margin:0 auto;min-width:0}.skip-link{position:absolute;top:-80px;left:12px;z-index:99;background:var(--white);color:#111;padding:8px}.skip-link:focus{top:8px}.site-header{position:relative;z-index:20}.topbar{background:rgba(8,10,13,.96);border-bottom:1px solid var(--line)}.topbar-inner{max-width:1200px;margin:auto;padding:0 24px;min-height:76px;display:flex;align-items:center;gap:22px}.site-brand{display:flex;align-items:center;gap:8px;flex:0 0 218px;min-width:0;color:var(--white)}.brand-logo{display:flex;max-width:100%;min-width:0;align-items:center}.brand-logo .logo,.site-brand .logo{max-height:36px;width:auto;max-width:180px}.brand-wordmark{font-size:9px;letter-spacing:.05em;line-height:1.5;color:var(--muted)}.desktop-nav{display:flex;align-items:center;gap:clamp(12px,1.7vw,23px);flex:1;justify-content:center;white-space:nowrap}.desktop-nav a{font-size:14px;color:var(--text);padding:24px 0 20px;border-bottom:2px solid transparent}.desktop-nav a:hover,.desktop-nav a.active{color:var(--bright);border-bottom-color:var(--bright)}.entry-btn{white-space:nowrap;flex:none;border-radius:999px;background:var(--blue);color:white;font-size:14px;line-height:42px;padding:0 19px;text-align:center}.entry-btn:hover{background:#7390FF;color:white}.menu-trigger{display:none;width:40px;height:40px;flex:none;border:1px solid var(--line2);border-radius:9px;background:var(--panel);align-items:center;justify-content:center;flex-direction:column;gap:5px}.menu-trigger span{width:18px;height:2px;background:var(--text)}.quickbar{background:#10141A;border-bottom:1px solid var(--line)}.quick-inner{height:45px;max-width:1200px;padding:0 24px;margin:auto;display:flex;align-items:center;gap:24px;white-space:nowrap;overflow-x:auto;scrollbar-width:none}.quick-inner::-webkit-scrollbar{display:none}.quick-inner a{color:var(--text);font-size:14px}.quick-inner a:hover{color:var(--bright)}.quick-prefix{font-size:12px;color:var(--ice);letter-spacing:.08em;border-right:1px solid var(--line2);padding-right:22px}.site-main{padding-top:42px;padding-bottom:80px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13px;margin-bottom:30px}.breadcrumbs a{color:var(--muted)}.page-lead{max-width:850px;margin:0 0 44px}.page-lead h1{max-width:850px}.eyebrow{text-transform:uppercase;color:var(--bright);font-weight:700;font-size:12px;letter-spacing:.13em;margin-bottom:14px}.lead-text{color:var(--text);font-size:17px;line-height:1.85}.longform{min-width:0}.readable{max-width:810px}.longform p{font-size:16px;line-height:1.85}.article-part{margin-bottom:48px;padding-top:4px;border-top:1px solid var(--line)}.article-part .eyebrow{margin:20px 0 12px}.article-part h2{margin-bottom:18px}.reading-layout{display:grid;grid-template-columns:minmax(0,800px) minmax(180px,1fr);gap:65px;align-items:start}.side-rail{position:sticky;top:24px}.local-toc{display:flex;flex-direction:column;padding:20px;border:1px solid var(--line);background:var(--panel);border-radius:13px;gap:10px}.local-toc strong{font-size:14px;color:var(--white);margin-bottom:5px}.local-toc a{font-size:13px;color:var(--muted);line-height:1.5}.side-note{border-left:2px solid var(--blue);padding-left:15px;font-size:13px;color:var(--muted);margin-top:24px}.reading-next{background:var(--panel);border:1px solid var(--line);padding:26px 30px;border-radius:14px;margin-top:44px}.reading-next h2{font-size:22px}.reading-next p{color:var(--muted);font-size:14px}.reading-links{display:flex;gap:10px 22px;flex-wrap:wrap}.reading-links a{font-size:14px;border-bottom:1px solid var(--line2);padding:5px 0}.table-wrap{overflow-x:auto}.wide-section{padding:22px;border:1px solid var(--line);border-radius:13px;background:var(--panel);margin-bottom:38px}table{border-collapse:collapse;width:100%;min-width:500px}th,td{padding:11px 13px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}th{color:var(--white);background:var(--secondary)}.muted{font-size:13px;color:var(--muted)}.compare-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:40px}.compare-grid>div{background:var(--panel);padding:22px;border:1px solid var(--line);border-radius:12px}.compare-grid b,.compare-grid span{display:block}.compare-grid b{color:var(--white)}.compare-grid span{font-size:14px;color:var(--muted)}.feature-stack{display:flex;flex-wrap:wrap;align-items:flex-start;gap:20px;margin:0 0 45px}.feature-figure,.editorial-figure{width:min(500px,100%);margin:4px 0 25px}.feature-figure.device{max-width:270px}.feature-figure img,.editorial-figure img{max-height:245px;margin:auto}.feature-figure.device img{max-height:340px}.media,.missing-media{width:100%;max-width:100%;object-fit:contain;object-position:center;border:1px solid var(--line);border-radius:13px;background:var(--panel)}.missing-media{height:170px;background:linear-gradient(120deg,#12161C,#0D1015);position:relative}.missing-media:after{content:' ';position:absolute;inset:48% 43%;border-top:1px solid rgba(255,255,255,.15)}figcaption{font-size:13px;color:var(--muted);margin-top:10px;line-height:1.65}figcaption strong,figcaption span{display:block}figcaption strong{color:var(--white);font-size:15px}.editorial-figure img{max-height:245px}.gallery-group{margin:50px 0}.visual-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.visual-card{min-width:0;background:var(--card);padding:14px;border:1px solid var(--line);border-radius:13px}.visual-card img{width:100%;max-height:250px;margin:auto}.visual-card .missing-media{height:170px}.visual-card figcaption{padding:4px 5px 6px}.visual-card figcaption span{margin-top:9px;line-height:1.8}.news-list{max-width:1000px}.news-item,.category-panel{display:grid;grid-template-columns:58px minmax(0,1fr);gap:20px;padding:25px 0;border-top:1px solid var(--line)}.news-item h2,.category-panel h2{font-size:22px}.news-item p,.category-panel p{font-size:15px;max-width:770px}.index-num{font-size:18px;color:var(--bright);font-variant-numeric:tabular-nums;font-weight:700}.text-link{font-size:14px}.category-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px 34px}.category-panel{grid-template-columns:40px minmax(0,1fr)}.faq-list{max-width:900px}.faq-list details{border-top:1px solid var(--line);padding:0 18px}.faq-list details:last-child{border-bottom:1px solid var(--line)}.faq-list summary{padding:22px 0;cursor:pointer;color:var(--white);font-weight:700;font-size:17px}.faq-answer{padding:0 0 14px 20px;border-left:2px solid var(--blue)}.faq-answer p{margin-bottom:12px}.site-footer{background:#050608;border-top:1px solid var(--line);padding:56px 0 18px}.footer-grid{display:grid;grid-template-columns:1.2fr 2fr 1fr;gap:45px}.footer-brand .logo{max-height:36px;width:auto;max-width:190px}.footer-brand p{font-size:13px;color:var(--muted);margin-top:12px}.site-footer h2{font-size:16px}.footer-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px 12px}.footer-links a,.footer-services a{font-size:13px;color:var(--muted)}.footer-services a{display:block;margin-bottom:7px}.footer-services p{font-size:13px;color:var(--muted);margin-top:16px}.footer-bottom{border-top:1px solid var(--line);margin-top:40px;padding-top:15px;color:var(--muted);font-size:12px;display:flex;justify-content:space-between;gap:16px}#back-to-top{position:fixed;right:20px;bottom:22px;z-index:10;width:42px;height:42px;border:1px solid var(--line2);border-radius:50%;background:var(--card);color:var(--ice);opacity:0;pointer-events:none;transition:opacity .2s}#back-to-top.visible{opacity:1;pointer-events:auto}.drawer-overlay{position:fixed;inset:0;z-index:29;background:rgba(0,0,0,.66);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.site-drawer{position:fixed;inset:0 auto 0 0;width:min(86vw,340px);max-width:390px;z-index:30;background:var(--panel);border-right:1px solid var(--line2);overflow-y:auto;transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .2s,visibility .2s;padding:18px 22px 40px}.drawer-open{overflow:hidden}.drawer-open .drawer-overlay{opacity:1;visibility:visible;pointer-events:auto}.drawer-open .site-drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:16px}.drawer-top .logo{width:auto;max-width:175px;max-height:34px}.drawer-close{height:38px;width:38px;border:1px solid var(--line2);border-radius:8px;color:var(--white);background:var(--card);font-size:26px;line-height:30px}.drawer-group{padding:15px 0 11px;border-bottom:1px solid var(--line)}.drawer-group h2{font-size:13px;color:var(--ice);margin:0 0 11px}.drawer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px 12px}.drawer-links a{font-size:14px;color:var(--text);line-height:1.7}.drawer-links a[aria-current=page]{color:var(--bright)}.home-section{margin:55px 0 70px}.section-heading{max-width:820px;margin-bottom:28px}.section-heading p:last-child{color:var(--muted)}.section-heading h2{font-size:27px}.home-hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,1fr);gap:44px;align-items:center;min-height:325px;margin-top:8px}.home-hero h1{font-size:41px;line-height:1.35}.home-hero .lead-text{font-size:16px}.hero-actions{display:flex;flex-wrap:wrap;gap:24px;font-size:15px}.hero-picture,.hero-picture figure{min-width:0}.hero-picture img{max-height:245px;width:100%;height:auto}.hero-picture .missing-media{height:245px}.interest-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.interest-card{display:grid;grid-template-columns:40px minmax(0,1fr);gap:18px;padding:24px;background:var(--card);border:1px solid var(--line);border-radius:13px;color:var(--text)}.interest-card:hover{background:var(--hover)}.interest-card h3{font-size:19px;margin-bottom:9px}.interest-card p{font-size:14px}.inline-more{color:var(--bright);font-size:13px}.asymmetric{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,.85fr);gap:55px}.number-notes>div{border-top:1px solid var(--line);padding:17px 0}.number-notes b{font-size:14px;color:var(--white)}.number-notes p{font-size:14px;color:var(--muted);margin-bottom:5px}.number-notes a{font-size:14px}.two-essays{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:55px}.two-essays article{border-top:1px solid var(--line);padding-top:20px}.two-essays p{font-size:15px}.prompt-question{color:var(--ice);font-size:14px!important;border-left:2px solid var(--blue);padding-left:12px}.image-triptych{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.image-triptych figure,.visual-notes figure{min-width:0}.image-triptych img{max-height:180px;width:100%}.image-triptych .missing-media{height:180px}.section-end{margin-top:24px}.image-text{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:42px;align-items:center}.image-text figure{min-width:0}.image-text figure img{max-height:245px;margin:auto}.image-text figure .missing-media{height:235px}.quiet-section{border-block:1px solid var(--line);padding-block:35px}.visual-notes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.visual-notes img{max-height:160px;width:100%}.visual-notes .missing-media{height:160px}.resource-row{border-top:1px solid var(--line);display:grid;grid-template-columns:42px minmax(0,1fr) auto;gap:20px;align-items:start;padding:18px 0}.resource-row h3{margin-bottom:6px}.resource-row p{font-size:14px;color:var(--muted);margin-bottom:0}.resource-row>a{font-size:14px;white-space:nowrap}.mobile-image-text{grid-template-columns:minmax(0,1.5fr) minmax(200px,.7fr)}.mobile-image-text .device{max-width:270px;justify-self:center}.mobile-image-text .device img{max-height:340px;width:auto}.closing-note{border-top:1px solid var(--line);padding-top:30px;max-width:900px}.closing-note p{font-size:15px}
@media(max-width:1100px){.topbar-inner{gap:12px}.site-brand{flex-basis:180px}.brand-wordmark{display:none}.desktop-nav{gap:12px}.desktop-nav a{font-size:13px}}
@media(max-width:979px){.topbar-inner{min-height:64px;position:relative;justify-content:space-between;padding:0 20px}.menu-trigger{display:flex}.site-brand{position:absolute;left:50%;transform:translateX(-50%);width:auto;max-width:calc(100% - 210px);flex:initial;justify-content:center}.site-brand .logo{max-height:28px;max-width:125px}.desktop-nav{display:none}.entry-btn{line-height:40px;font-size:13px;padding:0 15px;margin-left:auto}.quick-inner{padding:0 20px;gap:22px}.site-main{padding-top:30px}.reading-layout{grid-template-columns:minmax(0,1fr)}.side-rail{position:static;order:-1}.local-toc{display:flex;flex-direction:row;flex-wrap:wrap;gap:7px 18px}.local-toc strong{width:100%}.side-note{display:none}.footer-grid{grid-template-columns:1fr 1.6fr}.footer-services{grid-column:1/-1}.footer-services a{display:inline-block;margin-right:20px}.asymmetric{gap:28px}.home-hero{gap:24px}.home-hero h1{font-size:34px}}
@media(max-width:767px){.container{width:calc(100% - 32px)}.quick-inner{padding:0 16px;gap:19px;height:44px}.quick-prefix{display:none}.site-main{padding-bottom:54px}.page-lead{margin-bottom:28px}h1{font-size:27px}h2,.section-heading h2{font-size:22px}h3{font-size:18px}.lead-text{font-size:15px}.article-part{margin-bottom:31px}.longform p{font-size:15px}.home-section{margin:34px 0 40px}.home-hero{grid-template-columns:1fr;gap:20px}.home-hero .hero-picture{order:-1}.home-hero h1{font-size:30px}.hero-picture img{max-height:145px}.hero-picture .missing-media{height:145px}.interest-grid,.two-essays,.asymmetric,.image-text,.category-index{grid-template-columns:1fr}.interest-card{padding:17px}.two-essays{gap:22px}.image-text{gap:18px}.image-triptych{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.image-triptych img{max-height:155px}.visual-notes{grid-template-columns:repeat(2,minmax(0,1fr))}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.visual-card{padding:10px}.visual-card img{max-height:185px}.feature-figure img,.editorial-figure img,.image-text figure img{max-height:185px}.feature-figure.device img,.mobile-image-text .device img{max-height:340px}.resource-row{grid-template-columns:28px minmax(0,1fr);gap:12px}.resource-row>a{grid-column:2}.news-item,.category-panel{grid-template-columns:35px minmax(0,1fr);gap:10px}.reading-next{padding:19px}.footer-grid{grid-template-columns:1fr 1fr;gap:20px}.footer-brand{grid-column:1/-1}.footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-services{grid-column:auto}.footer-services a{display:block}.footer-bottom{flex-direction:column}.mobile-image-text .device{order:-1;max-width:220px}.mobile-image-text .device img{max-height:340px}}
@media(max-width:390px){.topbar-inner{padding:0 12px;gap:5px}.site-brand{max-width:calc(100% - 196px)}.site-brand .logo{max-width:100%;max-height:28px}.entry-btn{padding:0 12px;font-size:12px}.visual-grid{grid-template-columns:1fr}.image-triptych{grid-template-columns:1fr}.interest-card{grid-template-columns:26px minmax(0,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.footer-links{grid-template-columns:1fr}}
@media(max-width:350px){.footer-grid{grid-template-columns:1fr}.footer-services{grid-column:auto}.site-brand .logo{max-height:25px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}