body.site{margin:0;color:#17212b;background:radial-gradient(circle at top,rgba(74,119,255,.08),transparent 34%),linear-gradient(180deg,#f5f8ff,#eef3fb 46%,#f8fafc);font-family:var(--font-serif),ui-serif,Georgia,serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}body.site a{color:inherit;text-decoration:none}body.site img{display:block;max-width:100%;height:auto}body.site .site-shell{width:min(1180px,calc(100vw - 24px));margin:0 auto}body.site .site-top{position:-webkit-sticky;position:sticky;top:0;z-index:30;background:rgba(245,248,255,.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid rgba(18,34,58,.1)}body.site .site-bar{display:grid;grid-template-columns:1fr auto;align-items:center;grid-gap:12px;gap:12px;min-height:56px}body.site .brand{display:inline-flex;align-items:center;min-width:0;gap:10px;font-weight:700;letter-spacing:.02em;color:#102033}body.site .brand-mark{width:28px;height:28px;border-radius:9px;background:linear-gradient(135deg,#1b4db6,#59a7ff);box-shadow:0 10px 24px rgba(27,77,182,.22);flex:0 0 auto}body.site .brand-text{font-size:16px;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}body.site .brand-link{display:inline-flex;align-items:center;min-width:0}body.site .menu{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid rgba(18,34,58,.15);background:#ffffff;color:#102033;border-radius:999px;width:42px;height:42px;display:inline-grid;place-items:center;box-shadow:0 10px 24px rgba(16,32,51,.08)}body.site .menu:before{content:"☰";font-size:16px;line-height:1}body.site.nav-open .menu:before{content:"×";font-size:20px}body.site .chrome-nav{position:absolute;left:12px;right:12px;top:100%;margin-top:10px;padding:12px;background:#ffffff;border:1px solid rgba(18,34,58,.12);border-radius:18px;box-shadow:0 20px 40px rgba(16,32,51,.12);display:none}body.site.nav-open .chrome-nav{display:block}body.site .nav-list{list-style:none;padding:0;margin:0;display:grid;grid-gap:8px;gap:8px}body.site .nav-list>li{position:relative}body.site .nav-list>li>a,body.site .nav-list>li>span{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:11px 12px;border-radius:14px;background:#f4f7fc;color:#122033}body.site .nav-list>li.tap>.sub-nav,body.site .nav-list>li:hover>.sub-nav{display:grid}body.site .sub-nav{list-style:none;margin:8px 0 0;padding:8px;display:none;gap:4px;background:#ffffff;border:1px solid rgba(18,34,58,.12);border-radius:14px}body.site .sub-nav a{display:block;padding:10px 12px;border-radius:12px;color:#29405f}body.site main{padding:18px 0 42px}body.site .article-card,body.site .copy,body.site .crumbs,body.site .friend-box,body.site .hero-card,body.site .list-card,body.site .panel,body.site .toc{background:rgba(255,255,255,.82);border:1px solid rgba(18,34,58,.1);box-shadow:0 18px 40px rgba(16,32,51,.08);border-radius:22px}body.site .hero-grid{display:grid;grid-gap:14px;gap:14px}body.site .hero-card{overflow:hidden}body.site .hero-copy{padding:18px}body.site h1{margin:0;font-size:16px;line-height:1.25;letter-spacing:.01em}body.site h2{margin:0;font-size:14px;line-height:1.5}body.site .hero-desc{margin:12px 0 0;color:#4a5970;font-size:14px;line-height:1.8}body.site .hero-media{aspect-ratio:16/10;position:relative}body.site .hero-media img{object-fit:cover}body.site .hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}body.site .pill{display:inline-flex;align-items:center;padding:7px 11px;border-radius:999px;background:#e9f0ff;color:#21467f;font-size:13px}body.site .home-grid{margin-top:14px;display:grid;grid-gap:14px;gap:14px}body.site .panel{padding:16px}body.site .panel-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:14px}body.site .panel-head a{font-size:13px;color:#4a5970}body.site .cards{display:grid;grid-gap:12px;gap:12px}body.site .home-block{overflow:hidden}body.site .home-block .block-body{padding:14px 16px 16px}body.site .home-block h2{font-size:15px;margin-bottom:8px}body.site .home-block .block-html{color:#425168;font-size:14px;line-height:1.9}body.site .crumbs ol,body.site .friend-list,body.site .hot-list,body.site .pager,body.site .tag-list,body.site .toc ol{list-style:none;margin:0;padding:0}body.site .hot-list{display:grid;grid-gap:8px;gap:8px}body.site .hot-list a{display:block;padding:12px 14px;border-radius:16px;background:#f4f7fc;color:#13253c}body.site .tag-list{display:flex;flex-wrap:wrap;gap:10px}body.site .tag-list a{display:inline-flex;align-items:center;padding:8px 12px;border-radius:999px;background:#edf4ff;color:#21467f;font-size:13px}body.site .list-grid{display:grid;grid-gap:12px;gap:12px}body.site .list-item{overflow:hidden}body.site .list-item .item-body{padding:14px 16px 16px}body.site .list-item h2{font-size:15px;line-height:1.45}body.site .list-item .item-media{position:relative;aspect-ratio:16/9}body.site .list-item .item-media img{object-fit:cover}body.site .crumbs{padding:12px 14px;margin-bottom:14px}body.site .crumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px;color:#51627a}body.site .crumbs li{display:inline-flex;align-items:center;gap:8px}body.site .crumbs li+li:before{content:">";color:#94a3b8}body.site .article-card{padding:18px}body.site .article-meta{margin-top:8px}body.site .article-desc{margin:10px 0 0;color:#44536a;font-size:14px;line-height:1.9}body.site .article-cover{margin:14px 0 0;border-radius:18px;overflow:hidden}body.site .article-cover .cover-frame{position:relative;aspect-ratio:16/10}body.site .article-cover .cover-frame img{object-fit:cover}body.site .toc{padding:14px 16px;margin:14px 0}body.site .toc ol{display:grid;grid-gap:8px;gap:8px;font-size:13px}body.site .toc a{color:#21467f}body.site .copy{padding:18px;color:#243449;line-height:1.95;font-size:15px}body.site .copy h2{margin:1.3em 0 .6em;font-size:15px}body.site .copy ol,body.site .copy p,body.site .copy ul{margin:0 0 1em}body.site .pager{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px}body.site .pager a,body.site .pager span{display:inline-flex;align-items:center;min-height:38px;padding:0 12px;border-radius:999px;background:#ffffff;border:1px solid rgba(18,34,58,.1)}body.site .friend-box{margin-top:14px;padding:16px}body.site .friend-list{display:flex;flex-wrap:wrap;gap:10px}body.site .friend-list a{display:inline-flex;padding:8px 12px;border-radius:999px;background:#f4f7fc;color:#304766}body.site footer{padding:20px 0 36px;color:#607086;font-size:12px}body.site .site-foot{display:grid;grid-gap:8px;gap:8px}body.site .site-foot .icp{color:#6d7e92}@media (min-width:769px){body.site .site-shell{width:min(1240px,calc(100vw - 48px))}body.site .site-top{position:-webkit-sticky;position:sticky}body.site .site-bar{min-height:72px;grid-template-columns:auto 1fr auto}body.site .brand-text{font-size:18px}body.site .menu{display:none}body.site .chrome-nav{position:static;margin:0;padding:0;border:0;box-shadow:none;display:block!important;background:transparent;justify-self:end}body.site .nav-list{display:flex;align-items:center;gap:10px}body.site .nav-list>li>a,body.site .nav-list>li>span{background:transparent;padding:10px 12px;border-radius:999px}body.site .sub-nav{position:absolute;top:calc(100% + 10px);left:0;min-width:220px;z-index:20}body.site .hero-grid{grid-template-columns:1.18fr .82fr;align-items:stretch}body.site .home-grid{grid-template-columns:1.1fr .9fr}body.site .cards,body.site .list-grid{grid-template-columns:repeat(2,minmax(0,1fr))}body.site .article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;grid-gap:16px;gap:16px;align-items:start}body.site .toc{position:-webkit-sticky;position:sticky;top:88px}}