:root{--bg:#f1f3f4;--surface:#fff;--text:#152027;--muted:#65747c;--line:#dde4e6;--accent:#008d88;--soft:#e8f7f5;--code:#edf2f3;--scrollbar:#b7c7ca;--hx-tint:#eaf1f3;--hx-pick:#e9f9f6;--hx-shadow:0 16px 48px #071e2608;--uu-cyan:#00d2c4;--uu-black:#030809}
:root.dark{--bg:#080f14;--surface:#101d24;--text:#f1f6f7;--muted:#a1b4bc;--line:#253841;--accent:#29ded0;--soft:#102d30;--code:#13262f;--scrollbar:#3c5b63;--hx-tint:#0e2029;--hx-pick:#0f292d;--hx-shadow:none}
.hx-page .site-header{background:#151a1e;border-color:#ffffff12;color:#eef5f5}
.hx-page .header-inner{min-height:76px;max-width:1320px;padding:14px 40px;gap:34px}
.hx-page .brand{color:var(--uu-cyan);font-size:22px;font-weight:700;letter-spacing:.02em}
.hx-page .brand:before{background:var(--uu-cyan);color:#022c29;border-radius:50%;width:34px;height:34px;font-size:27px}
.hx-page #site-navigation{justify-content:flex-start;margin-left:18px;gap:30px}
.hx-page #site-navigation a{color:#c8d1d5;font-size:14px;font-weight:500}
.hx-page #site-navigation a:hover,.hx-page #site-navigation a[aria-current=page]{color:var(--uu-cyan)}
.hx-page #site-navigation a[aria-current]::after{background:var(--uu-cyan)}
.hx-page .search-toggle,.hx-page .theme-toggle,.hx-page .menu-toggle{color:#d3e5e6;border-color:#ffffff26;border-radius:7px}
.hx-page .header-inner>.theme-toggle{margin-left:-20px}
.hx-page .hx-landing-shell{max-width:none;padding:0}
.hx-landing-shell .hx-content-stage{max-width:1280px;margin:0 auto;padding:62px 40px 20px;min-width:0}
.hx-hero{display:block;position:relative;isolation:isolate;min-height:600px;padding:94px max(40px,calc((100% - 1200px)/2)) 118px;margin:0;background:var(--uu-black);overflow:hidden;color:#fff}
.hx-hero-visual{position:absolute;z-index:-2;inset:0;background-image:url('images/hero-network.webp');background-size:cover;background-position:center right;pointer-events:none}
.hx-hero:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,#030809 0%,#030809e8 23%,#0308097a 45%,#03080900 72%),linear-gradient(0deg,#030809 0%,#03080900 24%);pointer-events:none}
.hx-hero-content{position:relative;max-width:690px;z-index:1}
.hx-kicker{color:#7aede2;font-size:12px;letter-spacing:.14em;margin-bottom:22px}
.hx-kicker>span{background:var(--uu-cyan);box-shadow:0 0 0 4px #00d2c414}
.hx-hero h1{color:#fff;font-size:clamp(42px,4.65vw,64px);font-weight:700;line-height:1.28;letter-spacing:-.05em;margin:0 0 22px;white-space:normal}
.hx-hero h1 em{font-style:normal;color:var(--uu-cyan);background:linear-gradient(90deg,#00d2c4,#81f9e3);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hx-hero-content>p{color:#c5d2d6;font-size:15px;max-width:460px;line-height:1.9;margin:0 0 19px}
.hx-hero-topics{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:12px;color:#c7d6d7;margin-bottom:32px}
.hx-hero-topics i{height:11px;width:1px;background:#ffffff32}
.hx-actions{gap:26px}
.hx-page .hx-primary,:root.dark .hx-page .hx-primary{height:56px;min-width:220px;border:0;border-radius:7px;background:var(--uu-cyan);color:#032d2b;font-size:16px;font-weight:700;gap:12px;padding:14px 23px;box-shadow:0 12px 38px #00d2c421}
.hx-page .hx-primary:hover{background:#58ebde;box-shadow:0 14px 48px #00d2c432}
.hx-primary>span{margin-left:12px}
.hx-hero .hx-text-link{color:#dce9eb;font-size:13px;font-weight:500}
.hx-hero .hx-text-link:hover{color:var(--uu-cyan)}
.hx-hero-content>.hx-hero-caption{font-size:11px;margin:19px 0 0;color:#809fA6}
.hx-hero-bottom{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));position:absolute;bottom:0;left:50%;width:min(1200px,calc(100% - 80px));transform:translateX(-50%);border-top:1px solid #ffffff18;gap:16px;padding:19px 0 20px;pointer-events:none}
.hx-hero-bottom span{font-size:12px;color:#b5d4d7;display:flex;align-items:center;gap:10px}
.hx-hero-bottom span:before{content:"✓";display:grid;place-items:center;width:20px;height:20px;border:1px solid #00d2c452;border-radius:50%;font-size:10px;color:var(--uu-cyan)}
.hx-disclosure{max-width:1280px;margin:0 auto;border:0;padding:17px 40px 0;font-size:11px;color:var(--muted);line-height:1.8}
.hx-featured{margin-bottom:70px}
.hx-section-heading{margin-bottom:28px;align-items:center}
.hx-page .eyebrow{letter-spacing:.11em;font-size:11px;color:var(--accent)}
.hx-section-heading h2{font-size:32px;line-height:1.45;font-weight:700;letter-spacing:-.04em;margin:10px 0 0}
.hx-section-note{font-size:12px;color:var(--muted)}
.hx-featured-grid{gap:26px}
.hx-pick{background:var(--surface);border:1px solid var(--line);border-radius:17px;padding:30px 32px 24px;box-shadow:none;transition:transform .2s ease,border-color .2s ease}
.hx-pick:nth-child(even){background:var(--hx-pick)}
.hx-pick:hover{transform:translateY(-4px);border-color:var(--accent)}
.hx-pick-label{font-size:11px;color:var(--accent);letter-spacing:.06em}
.hx-pick-arrow{height:38px;width:38px;background:var(--soft);border-color:var(--line);border-radius:9px;font-size:23px}
.hx-pick h3{font-size:28px;line-height:1.65;font-weight:700;margin:14px 0}
.hx-pick>p{font-size:13px;line-height:2;margin-bottom:23px}
.hx-pick-footer{font-size:12px;border-top:1px solid var(--line);padding-top:19px}
.hx-pick-footer a{padding:8px 12px;border-radius:5px;background:var(--accent);color:var(--surface);font-size:12px}
:root.dark .hx-pick-footer a{color:#032d2b}
.hx-page .article-list{gap:22px}
.hx-page .article-card{border-radius:13px;padding:26px 27px;background:var(--surface);transition:transform .2s ease,border-color .2s ease}
.hx-page .article-card:hover{border-color:var(--accent);transform:translateY(-3px)}
.hx-page .article-card h2{font-size:20px;line-height:1.7;margin-bottom:12px;letter-spacing:-.02em}
.hx-card-top{font-size:11px;margin-bottom:10px}
.hx-page .card-summary{font-size:13px;line-height:1.95;margin-bottom:22px}
.hx-page .card-footer,.hx-page .read-more{font-size:11px}
.hx-page .pinned{border-radius:3px}
.hx-steps{margin:64px 0 0;padding:36px;background:var(--hx-tint);border:0;border-radius:20px}
.hx-steps h2{font-size:30px;font-weight:700;letter-spacing:-.03em;margin:10px 0 28px}
.hx-step-grid{gap:35px}
.hx-step-grid b{font-size:15px;color:var(--text)}
.hx-step-grid p{font-size:13px;line-height:1.95;margin-top:10px}
.hx-landing-shell>.home-rail{max-width:1280px;margin:0 auto;padding:0 40px 44px}
.hx-page .home-sidebar{margin-top:18px;padding-top:26px}
.hx-page .sidebar-section h2{font-size:14px}.hx-page .category-list a{font-size:12px}.hx-page .tag-list a{font-size:11px}
.hx-page .site-footer{background:#111b21;border-color:#ffffff0d;color:#9cb2ba;padding:14px 40px}
.hx-footer-line{max-width:1200px;color:#9cb2ba;font-size:11px}
.hx-page .friend-links{max-width:1200px;font-size:11px;color:#bdced3}
.hx-page .article-shell>article{border-radius:16px;padding:36px 40px}
.hx-page .article-header h1{font-size:32px}
.hx-page .prose{font-size:15px;line-height:2.05}
.hx-page .prose blockquote{font-size:13px;border-radius:0 8px 8px 0}
.hx-page .prose table{font-size:13px}
.hx-page .prose code{color:var(--text)}
.hx-page .toc{border-radius:12px}.hx-page .toc a{font-size:12px}
.hx-page .metadata{font-size:12px}
.hx-page .ad-card{border-radius:13px}
@media(min-width:1600px){.hx-hero{min-height:680px;padding-top:123px;padding-bottom:138px}.hx-landing-shell{padding-top:0!important}.hx-hero h1{font-size:70px}}
@media(max-width:1080px){.hx-page .header-inner{gap:24px;padding:14px 28px}.hx-page #site-navigation{gap:20px;margin-left:0}.hx-page #site-navigation a{font-size:13px}.hx-hero{padding-left:40px;padding-right:40px;min-height:560px;padding-top:80px}.hx-hero-content{max-width:600px}.hx-hero h1{font-size:54px}.hx-hero:after{background:linear-gradient(90deg,#030809 0%,#030809d9 40%,#03080930 100%),linear-gradient(0deg,#030809,#03080900 28%)}.hx-section-heading h2{font-size:28px}.hx-pick h3{font-size:25px}.hx-pick{padding:26px}.hx-page .article-header h1{font-size:29px}}
@media(max-width:760px){.hx-page .header-inner{min-height:64px;padding:12px 20px;gap:13px}.hx-page .brand{font-size:19px}.hx-page .brand:before{width:30px;height:30px;font-size:25px}.hx-page .header-inner>.theme-toggle{margin-left:0}.hx-page #site-navigation{background:#151a1e;gap:0;padding:12px 20px;border-color:#ffffff12;margin-left:0}.hx-page #site-navigation a{font-size:13px;padding:8px 10px}.hx-landing-shell .hx-content-stage{padding:32px 20px 10px}.hx-hero{min-height:680px;padding:41px 20px 270px}.hx-kicker{font-size:10px;margin-bottom:18px}.hx-hero h1{font-size:39px;line-height:1.4;margin-bottom:16px;letter-spacing:-.055em}.hx-hero-content{max-width:100%}.hx-hero-content>p{max-width:340px;font-size:12px;line-height:1.9;margin-bottom:16px}.hx-hero-visual{background-size:auto 475px;background-repeat:no-repeat;background-position:66% bottom}.hx-hero:after{background:linear-gradient(180deg,#030809 0%,#030809ed 28%,#03080955 55%,#03080900 73%,#030809 100%)}.hx-hero-topics{font-size:10px;gap:9px;margin-bottom:22px}.hx-actions{gap:17px;align-items:flex-start;flex-direction:column}.hx-page .hx-primary,:root.dark .hx-page .hx-primary{min-width:213px;height:51px;font-size:15px;padding:12px 19px;gap:12px}.hx-hero .hx-text-link{font-size:11px}.hx-hero-content>.hx-hero-caption{font-size:10px;margin-top:15px}.hx-hero-bottom{left:20px;transform:none;width:calc(100% - 40px);gap:8px;grid-template-columns:repeat(2,minmax(0,1fr));padding:15px 0 17px}.hx-hero-bottom span{font-size:10px;gap:7px}.hx-hero-bottom span:before{width:16px;height:16px;font-size:9px}.hx-disclosure{padding:14px 20px 0;font-size:10px;line-height:1.85}.hx-featured{margin-bottom:35px}.hx-section-heading{margin-bottom:20px}.hx-section-heading h2{font-size:24px;line-height:1.5;margin-top:7px}.hx-page .eyebrow{font-size:10px}.hx-featured-grid{gap:16px}.hx-pick{padding:22px;border-radius:13px}.hx-pick h3{font-size:23px;line-height:1.65;margin:10px 0}.hx-pick>p{font-size:12px;line-height:1.95;margin-bottom:18px}.hx-pick-label{font-size:10px}.hx-pick-arrow{height:30px;width:30px;font-size:21px}.hx-pick-footer{padding-top:14px;font-size:11px;gap:8px}.hx-pick-footer a{font-size:11px;padding:6px 9px}.hx-page .article-list{gap:15px}.hx-page .article-card{padding:22px;border-radius:12px}.hx-page .article-card h2{font-size:19px;line-height:1.75;margin-bottom:10px}.hx-page .card-summary{font-size:12px;margin-bottom:17px}.hx-card-top{font-size:10px}.hx-page .card-footer,.hx-page .read-more{font-size:10px}.hx-steps{margin-top:34px;padding:24px;border-radius:14px}.hx-steps h2{font-size:23px;line-height:1.5;margin:8px 0 22px}.hx-step-grid b{font-size:14px}.hx-step-grid p{font-size:12px}.hx-landing-shell>.home-rail{padding:0 20px 28px}.hx-page .site-footer{padding:10px 20px}.hx-footer-line{font-size:9px}.hx-page .article-shell>article{padding:24px 20px;border-radius:12px}.hx-page .article-header h1{font-size:24px}.hx-page .prose{font-size:14px}.hx-page .prose blockquote{font-size:12px}.hx-page .prose table{font-size:12px}.hx-page .metadata{font-size:11px}}

/* 目录在桌面正文左侧完整展开，随页面滚动，不使用内部滚动条。 */
.hx-hero-content>p:not(.hx-hero-caption){text-wrap:balance}
.hx-page.article-page .article-rail{position:static;max-height:none;overflow:visible}
.hx-page.article-page .article-rail>.toc{max-height:none;overflow:visible;flex:none}
.hx-page.article-page .article-rail>.toc>nav{max-height:none;overflow:visible;overscroll-behavior:auto}
@media(min-width:981px){
  .hx-page.article-page .article-shell{grid-template-columns:230px minmax(0,1fr)}
  .hx-page.article-page .article-shell>.breadcrumbs{order:0}
  .hx-page.article-page .article-shell>.article-rail{order:1}
  .hx-page.article-page .article-shell>article{order:2}
}
@media(min-width:761px) and (max-width:980px){
  .hx-page.article-page .article-shell{grid-template-columns:minmax(0,1fr)}
  .hx-page.article-page .article-shell>.article-rail{width:100%}
}

/* 选购准备以正文形式展示；文章索引在本篇目录下方。 */
.hx-page .hx-steps,:root.dark .hx-page .hx-steps{padding:0;background:transparent;border:0;border-radius:0;box-shadow:none}
.hx-page .hx-article-index{min-width:0;padding:16px 18px;background:var(--surface);border:1px solid var(--line);border-radius:12px;font-size:12px;line-height:1.8}
.hx-index-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;width:100%;padding:0;border:0;background:transparent;text-align:left;font:inherit;font-weight:650;color:var(--text);cursor:pointer}
.hx-index-menu{display:block;margin-top:4px;font-size:10px;font-weight:400;color:var(--muted)}
.hx-index-count{margin-left:6px;font-size:10px;font-weight:400;color:var(--muted)}
.hx-index-toggle{display:inline-block;color:var(--muted);transform:rotate(180deg)}
.hx-index-heading[aria-expanded="false"] .hx-index-toggle{transform:none}
.hx-index-content{display:flex;flex-direction:column;min-height:0}
.hx-index-content[hidden],.hx-index-count[hidden],.hx-index-status[hidden]{display:none}
.hx-index-list{display:grid;align-content:start;gap:0;margin-top:12px;min-height:0;overflow:visible}
.hx-index-list a{display:block;padding:8px 0;border-bottom:1px solid var(--line);color:var(--muted);line-height:1.75;overflow-wrap:anywhere}
.hx-index-list a:last-child{border-bottom:0}
.hx-index-list a:hover,.hx-index-list a[aria-current="page"]{color:var(--accent)}
.hx-index-list a[aria-current="page"]{font-weight:650}
.hx-index-home{display:block;flex:none;margin-top:13px;font-size:11px;color:var(--accent)}
.hx-index-status{font-size:10px;color:var(--muted);margin:7px 0 0}
.hx-index-heading:focus-visible,.hx-index-list:focus-visible{outline:1px solid var(--accent);outline-offset:4px}
.hx-page #site-navigation a[aria-current="true"]{color:var(--uu-cyan)}

/* 按后台 FriendLinks 原样输出；允许换行，页脚高度由原生阅读容器自动预留。 */
.hx-page .friend-links{display:flex;align-items:baseline;flex-wrap:wrap;gap:5px 18px;margin:0 auto 9px;padding-bottom:9px;border-bottom:1px solid #ffffff14;line-height:1.8}
.hx-page .friend-links-label{color:#93aab3;flex-shrink:0}
.hx-page .friend-links a{color:#c9d9df;overflow-wrap:anywhere}
.hx-page .friend-links a:hover{color:var(--uu-cyan)}
.hx-tag-tools{min-width:0}
.hx-client-tools{margin-top:25px;padding-top:19px;border-top:1px solid var(--line)}
.hx-tools-heading{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:15px}
.hx-tools-heading h2{font-size:14px;margin:0}
.hx-tools-heading>a{font-size:11px;color:var(--muted)}
.hx-tool-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 24px}
.hx-tool-links>a{display:flex;align-items:center;gap:12px;min-width:0;color:var(--text);font-size:12px;line-height:1.65}
.hx-tool-links svg{flex:none;color:var(--muted)}
.hx-tool-links small{display:block;color:var(--muted);font-size:10px;margin-top:3px}
.hx-tool-links>a:hover,.hx-tool-links>a:hover svg,.hx-tools-heading>a:hover{color:var(--accent)}
.hx-tool-links>a:focus-visible{outline:2px solid var(--accent);outline-offset:6px;border-radius:3px}
.hx-page .hx-tag-tools .sidebar-section{margin:0}
.hx-page .hx-article-index>details{min-height:0}
.hx-index-content{min-height:0}
.hx-index-content:focus-visible,.hx-page .toc>nav:focus-visible{outline:1px solid var(--accent);outline-offset:4px}
@media(min-width:981px){
  /* 索引占用目录下方剩余高度；实际高度随视口与悬停位置更新。 */
  .hx-page.article-page .article-rail{position:sticky;top:16px;align-self:start;display:flex;flex-direction:column;gap:16px;height:var(--hx-rail-height,calc(var(--article-scroll-height,70vh) - 96px));max-height:var(--hx-rail-height,calc(var(--article-scroll-height,70vh) - 96px));min-height:0;overflow:visible}
  .hx-page.article-page .article-rail>.toc{display:flex;flex-direction:column;flex:0 0 auto;max-height:min(230px,calc(var(--hx-rail-height,var(--article-scroll-height,70vh))*.36));min-height:0;overflow:hidden;padding:16px 18px}
  .hx-page.article-page .article-rail>.toc>div{flex:none}
  .hx-page.article-page .article-rail>.toc>nav{min-height:0;max-height:none;overflow-y:auto;overscroll-behavior-y:contain;scrollbar-width:none;padding-right:2px}
  .hx-page.article-page .article-rail>.hx-article-index{flex:1 1 0;display:flex;flex-direction:column;min-height:0;overflow:hidden;padding:16px 18px}
  .hx-page.article-page .hx-index-heading{flex:none}
  .hx-page.article-page .hx-index-content{flex:1 1 0;min-height:0;max-height:none;overflow:hidden}
  .hx-page.article-page .hx-index-list{flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior-y:contain;scrollbar-width:none;padding-right:2px}
  .hx-page.article-page .toc>nav::-webkit-scrollbar,.hx-page.article-page .hx-index-list::-webkit-scrollbar{display:none}
  .hx-page.article-page .article-rail>.hx-article-index.is-collapsed{flex:0 0 auto}
  .hx-page.article-page .article-rail>.ad-slot{flex:0 1 auto;min-height:0;max-height:calc(var(--hx-rail-height,var(--article-scroll-height,70vh))*.22);overflow:auto}
}
@media(max-width:980px){
  .hx-page.article-page .article-rail{position:static;height:auto;max-height:none;overflow:visible}
  .hx-page.article-page .article-rail>.toc,.hx-page.article-page .hx-article-index,.hx-index-content,.hx-index-list{max-height:none;overflow:visible}
}
@media(max-width:760px){
  .hx-page .home-sidebar{display:grid;grid-template-columns:minmax(0,1fr);gap:26px}
  .hx-page .home-rail{margin-top:20px}
  .hx-client-tools{margin-top:23px;padding-top:20px}
  .hx-tool-links{gap:18px 16px}
  .hx-tool-links>a{font-size:11px;gap:10px}
  .hx-tool-links svg{width:26px;height:26px}
  .hx-page .friend-links{font-size:10px;gap:3px 12px;padding-bottom:6px;margin-bottom:6px}
}

/* 标签保留名称与链接，以单色书签作为识别符号。 */
.hx-page .tag-list a{display:inline-flex;align-items:center;gap:5px}
.hx-page .hx-tag-bookmark{width:12px;height:12px;flex:none;opacity:.75}