:root{--yy-accent:#174f7a;--yy-accent2:#e7aa35;--yy-bg:#f4f6f8;--yy-line:#dfe5ea;--yy-text:#1e2933;}
*{box-sizing:border-box}html{font-size:16px}body{margin:0;background:var(--yy-bg);color:var(--yy-text);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}.yy-shell{width:min(1120px,calc(100% - 32px));margin:0 auto}.yy-top{background:#17222d;color:#dce6ee;font-size:13px}.yy-top .yy-shell{display:flex;justify-content:space-between;padding:6px 0}.yy-brand{display:flex;align-items:center;justify-content:space-between;min-height:88px}.yy-brand a{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:700}.yy-brand strong{display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:var(--yy-accent);color:#fff}.yy-brand span{color:#24313d}.yy-menu{display:none;border:1px solid var(--yy-line);background:#fff;padding:8px 12px;border-radius:6px}.yy-nav{background:var(--yy-accent);color:#fff}.yy-nav .yy-shell{display:flex;overflow-x:auto}.yy-nav a{padding:13px 15px;white-space:nowrap}.yy-nav a:hover{background:rgba(255,255,255,.13)}.yy-main{padding:24px 0 42px}.yy-panel{background:#fff;border:1px solid var(--yy-line);border-radius:12px;padding:22px;margin-bottom:20px}.yy-hero h1{margin:0 0 8px;font-size:30px;line-height:1.35}.yy-hero p{margin:0;color:#546270}.yy-features{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.yy-feature{background:#fff;border:1px solid var(--yy-line);border-radius:12px;overflow:hidden}.yy-feature img{width:100%;aspect-ratio:16/10;object-fit:cover}.yy-feature div{padding:14px}.yy-feature h2{font-size:17px;line-height:1.45;margin:0 0 7px}.yy-feature p{font-size:13px;color:#687583;margin:0}.yy-section-title{display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--yy-accent);margin-bottom:14px}.yy-section-title h2{margin:0;padding:5px 0;font-size:21px}.yy-section-title a{font-size:14px;color:var(--yy-accent)}.yy-category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.yy-list{list-style:none;margin:0;padding:0}.yy-list li{border-bottom:1px dotted var(--yy-line);padding:7px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.yy-video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.yy-video-card img{width:100%;aspect-ratio:16/9;object-fit:cover}.yy-video-card h3{font-size:16px;line-height:1.45}.yy-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:22px}.yy-article-list{display:grid;gap:14px}.yy-row{display:grid;grid-template-columns:220px 1fr;gap:16px;padding-bottom:14px;border-bottom:1px solid var(--yy-line)}.yy-row img{width:220px;aspect-ratio:16/10;object-fit:cover}.yy-row h2{font-size:19px;line-height:1.45;margin:0 0 6px}.yy-row p{font-size:14px;color:#64717e;margin:0}.yy-breadcrumb{font-size:14px;color:#687583;margin-bottom:12px}.yy-article h1{font-size:30px;line-height:1.35;margin:0 0 12px}.yy-meta{font-size:13px;color:#74808b;border-bottom:1px solid var(--yy-line);padding-bottom:12px;margin-bottom:18px}.yy-body p{margin:0 0 1.15em;font-size:17px}.yy-body .article-image{margin:18px auto 24px;max-width:860px}.yy-body .article-image img{width:100%;max-height:680px;object-fit:contain;background:#f7f8f9}.editor-opinion{border-left:4px solid var(--yy-accent2);background:#fff9ea;padding:16px 18px;margin:26px 0}.editor-opinion h2{font-size:20px;margin:0 0 7px}.yy-adjacent{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:24px 0}.yy-adjacent a,.yy-adjacent span{border:1px solid var(--yy-line);padding:12px;background:#fff}.yy-related ul{columns:2;padding-left:20px}.yy-footer{background:#17222d;color:#cfd7de;padding:28px 0;text-align:center;font-size:13px}.yy-player{position:relative;padding-top:56.25%;background:#000}.yy-player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.yy-sitemap-grid{columns:3}.yy-sitemap-grid a{display:block;padding:5px 0}.yy-404{text-align:center;padding:80px 20px}
@media(max-width:900px){.yy-features{grid-template-columns:repeat(2,1fr)}.yy-category-grid{grid-template-columns:repeat(2,1fr)}.yy-layout{grid-template-columns:1fr}.yy-aside{display:none}}
@media(max-width:640px){.yy-shell{width:min(100% - 24px,1120px)}.yy-top{display:none}.yy-brand{min-height:68px}.yy-brand a{font-size:20px}.yy-brand strong{width:40px;height:40px;font-size:17px}.yy-menu{display:block}.yy-nav{display:none}.yy-nav.is-open{display:block}.yy-nav .yy-shell{display:grid;grid-template-columns:repeat(2,1fr);padding:6px 0}.yy-nav a{padding:9px 8px}.yy-main{padding-top:14px}.yy-panel{padding:15px}.yy-hero h1,.yy-article h1{font-size:24px}.yy-features,.yy-category-grid,.yy-video-grid{grid-template-columns:1fr}.yy-row{grid-template-columns:116px 1fr;gap:11px}.yy-row img{width:116px;height:82px}.yy-row h2{font-size:16px}.yy-row p{display:none}.yy-body p{font-size:16px}.yy-adjacent{grid-template-columns:1fr}.yy-related ul{columns:1}.yy-sitemap-grid{columns:1}}