/* PG电子: dark cool-blue editorial system */
:root{color-scheme:dark;--bg:#080A0D;--surface:#0D1015;--surface2:#12161C;--surface3:#171C23;--hover:#1B2129;--text:#C7CDD5;--muted:#9098A3;--title:#F5F7FA;--blue:#5C7CFA;--bright:#6EA8FF;--ice:#8ED8FF;--line:rgba(255,255,255,.09);--line-strong:rgba(255,255,255,.16)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:85px}body{margin:0;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.8}a{color:var(--bright);text-underline-offset:3px}a:hover{color:var(--ice)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--ice);outline-offset:3px}button{font:inherit;cursor:pointer;color:inherit}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--title);line-height:1.4}h1{font-size:32px}h2{font-size:24px}h3{font-size:19px}p{margin-bottom:17px}.skip-link{position:absolute;top:-60px;left:12px;background:var(--blue);color:#fff;padding:8px;z-index:70}.skip-link:focus{top:6px}.site-header{position:sticky;top:0;z-index:50;background:rgba(8,10,13,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}.header-inner{max-width:1200px;height:68px;margin:auto;padding:0 24px;display:flex;align-items:center;gap:17px}.brand{display:flex;align-items:center;min-width:0;flex:0 0 auto;text-decoration:none;color:var(--title)}.brand img{display:block;max-width:115px;max-height:34px;width:auto;height:auto;object-fit:contain}.brand-word{font-size:21px;font-weight:800;letter-spacing:.4px}.primary-nav{display:flex;gap:20px;min-width:0;align-items:center;margin-left:auto}.primary-nav a{text-decoration:none;font-size:14px;white-space:nowrap;color:var(--text)}.primary-nav a[aria-current],.primary-nav a:hover{color:var(--bright)}.menu-toggle,.menu-close{border:1px solid var(--line-strong);background:var(--surface2);border-radius:10px;padding:8px 13px;white-space:nowrap}.menu-toggle{min-height:44px}.enter-link{display:inline-flex;align-items:center;justify-content:center;min-height:42px;border-radius:10px;padding:7px 16px;background:var(--blue);color:#fff!important;text-decoration:none;font-weight:700;white-space:nowrap;font-size:14px}.enter-link:hover{background:#4868e5}.menu-scrim[hidden],.menu-panel[hidden]{display:none!important}.menu-scrim{position:fixed;inset:68px 0 0;background:rgba(0,0,0,.46)}.menu-panel{position:absolute;right:max(24px,calc((100vw - 1200px)/2 + 24px));top:68px;width:min(710px,calc(100vw - 48px));padding:19px;background:var(--surface2);border:1px solid var(--line-strong);box-shadow:0 18px 45px rgba(0,0,0,.55);border-radius:0 0 16px 16px;max-height:72vh;overflow-y:auto}.menu-panel-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.menu-all{display:inline-block;padding:10px 0}.menu-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 25px}.menu-groups section{min-width:0}.menu-groups h2{font-size:15px;color:var(--ice);margin:15px 0 6px}.menu-links{display:flex;gap:7px;flex-wrap:wrap}.menu-links a{color:var(--text);font-size:14px;padding:4px 8px;text-decoration:none;border-radius:6px;border:1px solid var(--line)}.menu-links a:hover,.menu-links a[aria-current]{color:var(--bright);border-color:var(--blue)}.page-shell{max-width:1200px;padding:33px 24px 70px;margin:auto;min-width:0}.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--muted);margin-bottom:24px}.breadcrumbs a{color:var(--muted)}.page-heading{max-width:930px;margin-bottom:26px}.page-heading h1{margin-bottom:15px}.page-lead{font-size:17px;line-height:1.85;color:var(--text);max-width:850px}.section-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:32px}.section-nav a{font-size:13px;border:1px solid var(--line);padding:6px 12px;border-radius:999px;text-decoration:none;color:var(--muted)}.section-nav a[aria-current],.section-nav a:hover{color:var(--bright);border-color:var(--blue)}.page-content{min-width:0}.page-content>section{margin:0 0 35px}.article-section{max-width:810px}.article-section h2,.page-content>section>h2{border-left:3px solid var(--blue);padding-left:13px}.reading-list{padding-left:24px;max-width:830px}.reading-list li{margin:9px 0}.note{background:var(--surface2);border-left:3px solid var(--bright);border-radius:9px;padding:15px 20px;max-width:820px;margin:18px 0 35px}.note h3{font-size:17px;margin-bottom:4px}.note p{margin-bottom:0}.table-wrap{max-width:990px;overflow-x:auto;margin:20px 0 32px;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;min-width:580px;width:100%;background:var(--surface)}th,td{padding:12px 15px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);vertical-align:top;text-align:left;font-size:14px;line-height:1.65}th{color:var(--title);background:var(--surface3)}tr:last-child td{border-bottom:0}.steps{list-style:none;counter-reset:step;padding-left:0;max-width:860px}.steps li{counter-increment:step;position:relative;min-height:54px;margin:0 0 12px;padding:15px 17px 15px 61px;background:var(--surface2);border:1px solid var(--line);border-radius:12px}.steps li:before{content:counter(step);position:absolute;left:17px;top:14px;border-radius:50%;background:var(--blue);color:#fff;width:29px;height:29px;text-align:center;line-height:29px;font-weight:700}.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;max-width:990px;margin:20px 0 34px}.feature-tile{border-radius:12px;padding:20px;background:var(--surface2);border:1px solid var(--line);min-width:0}.feature-tile h3{font-size:18px;margin-bottom:7px}.feature-tile p{margin-bottom:0}.media-natural,.media-frame,.home-poster{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:8px;min-width:0;display:grid;place-items:center;gap:7px;margin:20px 0 30px;max-width:880px}.media-natural img{display:block;width:auto;height:auto;max-width:100%;max-height:280px;object-fit:contain;object-position:center}.media-frame{aspect-ratio:var(--media-ratio,16/9);overflow:visible}.media-frame img{display:block;width:100%;height:100%;object-fit:contain;object-position:center;min-height:0}.media-natural figcaption,.media-frame figcaption,.home-poster figcaption{font-size:13px;color:var(--muted);text-align:center;line-height:1.5;padding:0 4px}.missing-media{background:var(--surface3);border:1px dashed var(--line-strong);color:var(--muted);padding:18px;border-radius:9px;text-align:center;font-size:14px;width:100%;min-height:120px;display:grid;place-items:center}.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.catalog-item{min-width:0;padding:14px;background:var(--surface2);border-radius:12px}.catalog-item h3{font-size:16px;margin:0 0 6px}.catalog-item figure{margin:0;--media-ratio:4/3}.catalog-item img{max-height:180px}.term-index{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:28px}.term-index a{padding:4px 11px;border:1px solid var(--line);border-radius:8px;text-decoration:none}.term-entry{max-width:850px;border-bottom:1px solid var(--line);padding:0 0 16px;margin:0 0 25px}.term-entry h2{margin-bottom:8px}.term-entry p{margin-bottom:5px}.bookmark{display:flex;gap:18px;border-bottom:1px solid var(--line);padding:17px 0;max-width:860px}.bookmark-no{font-size:20px;font-weight:700;color:var(--blue)}.bookmark h2{font-size:19px;margin:0 0 6px}.bookmark p{margin:0}.map-group{margin-top:28px!important}.map-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.map-links>div{background:var(--surface2);padding:14px;border-radius:9px;border:1px solid var(--line)}.map-links h3{font-size:16px;margin:0 0 3px}.map-links p{font-size:13px;color:var(--muted);margin:0}.phone-figure img{max-height:355px}.faq-list{max-width:880px}.faq-list details{border-bottom:1px solid var(--line);padding:13px 5px}.faq-list summary{font-size:17px;color:var(--title);cursor:pointer}.faq-list p{padding:12px 7px 0}.related{border-top:1px solid var(--line-strong);margin-top:55px;padding-top:23px}.related h2{font-size:21px}.related-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.related-links a{display:flex;flex-direction:column;gap:3px;background:var(--surface2);padding:15px;border-radius:9px;border:1px solid var(--line);text-decoration:none}.related-links span{color:var(--muted);font-size:13px}.reading-cues{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:27px}.reading-cues span{border:1px solid var(--line);padding:4px 12px;border-radius:99px;color:var(--ice);font-size:14px}.home-poster{max-width:100%;min-height:115px}.home-poster img{display:block;width:auto;height:auto;max-width:100%;max-height:255px;object-fit:contain}.question-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.question-grid article{background:var(--surface2);border:1px solid var(--line);padding:20px;border-radius:12px}.question-grid h3{font-size:18px}.question-grid p{margin:0}.home-editorial{display:grid;grid-template-columns:1.2fr 1fr;gap:18px}.lead-story{padding:28px;background:var(--surface2);border-radius:14px;border:1px solid var(--line)}.lead-story h3{font-size:23px}.eyebrow{font-size:13px;color:var(--ice)}.short-reads{display:grid;gap:12px}.short-reads article{border-bottom:1px solid var(--line);padding:5px 4px}.short-reads h3{font-size:17px;margin:0 0 5px}.short-reads p{font-size:14px}.three-media{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.three-media figure{margin:0}.three-media img{max-height:210px}.rule-strip{padding:20px 25px;background:var(--surface2);border-top:2px solid var(--blue);border-radius:7px}.rule-strip p{margin:0}.site-footer{background:#050608;border-top:1px solid var(--line)}.footer-inner{max-width:1200px;padding:28px 24px;margin:auto;display:flex;justify-content:space-between;gap:45px}.footer-inner p{font-size:13px;color:var(--muted);margin:4px 0}.footer-disclaimer{max-width:700px}.footer-inner nav{display:flex;flex-wrap:wrap;align-content:flex-start;gap:11px 16px}.footer-inner nav a{font-size:13px;color:var(--text);white-space:nowrap}.back-top{position:fixed;bottom:20px;right:20px;border-radius:50%;background:var(--blue);border:0;width:44px;height:44px;color:#fff;z-index:20}.back-top[hidden]{display:none}
@media(max-width:1100px){.primary-nav{gap:12px}.header-inner{gap:12px}.primary-nav a{font-size:13px}}
@media(max-width:980px){.primary-nav{display:none}.header-inner{justify-content:space-between;padding:0 20px}.menu-toggle{margin-left:auto}.page-shell{padding-left:20px;padding-right:20px}.catalog-grid,.map-links{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){body{font-size:15px;line-height:1.8}h1{font-size:26px}h2{font-size:21px}h3{font-size:17px}.header-inner{height:64px;padding:0 16px;gap:8px}.brand img{max-width:96px;max-height:32px}.brand-word{font-size:17px}.menu-toggle{min-height:44px;padding:7px 10px;font-size:14px}.enter-link{padding:6px 10px;font-size:13px;min-height:44px}.page-shell{padding:24px 16px 45px}.page-lead{font-size:15px}.menu-scrim{inset:0;background:rgba(0,0,0,.65)}.menu-panel{position:fixed;top:auto;bottom:0;left:0;right:0;width:100%;max-height:85vh;max-height:85dvh;overflow:auto;padding:18px 16px calc(15px + env(safe-area-inset-bottom));border-radius:18px 18px 0 0}.menu-groups{grid-template-columns:1fr}.feature-grid,.question-grid,.home-editorial,.related-links,.map-links,.catalog-grid{grid-template-columns:1fr}.three-media{grid-template-columns:1fr}.three-media img{max-height:210px}.media-natural img{max-height:210px}.phone-figure img{max-height:280px}.home-poster img{max-height:170px}.catalog-item img{max-height:165px}.site-footer .footer-inner{padding:24px 16px;flex-direction:column;gap:10px}.table-wrap{max-width:100%}th,td{font-size:13px;padding:10px}.reading-cues{margin-bottom:20px}.bookmark{gap:12px}.rule-strip{padding:16px}.page-content>section{margin-bottom:27px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}