:root{--xz-ink:#354254;--xz-blue:#3c567a}html{scroll-behavior:smooth}body{background:#f6f8fa;color:var(--xz-ink)}.xz-header{height:80px;background:var(--xz-blue);position:relative;z-index:50;box-shadow:0 2px 7px #0002}.xz-navwrap{max-width:1400px;margin:auto;height:100%;padding:0 36px;display:flex;align-items:center;justify-content:space-between;gap:25px}.xz-brand{font-size:25px;font-weight:700;color:#fff!important}.xz-nav{display:flex;gap:28px;align-items:center}.xz-nav a,.xz-nav button{color:#fff;font-size:17px;font-weight:500}.xz-nav a:hover{opacity:.75}.xz-nav button,.xz-menu{border:0;background:none;cursor:pointer;padding:10px;color:#fff}.xz-menu{display:none}.xz-home .xz-header{position:absolute;top:0;left:0;right:0;background:#29456a36;backdrop-filter:blur(5px)}.xz-hero{height:100vh;min-height:560px;height:100svh;background-size:cover;background-position:center;position:relative;display:flex;align-items:center;justify-content:center}.xz-shade{position:absolute;inset:0;background:rgba(12,22,48,.23)}.xz-hero-copy{position:relative;text-align:center;color:white;padding:80px 24px;max-width:1100px;transform:translateY(-4vh)}.xz-hero-copy h1{max-width:1080px;margin:0 auto;font-size:clamp(27px,2.8vw,38px);font-weight:400;line-height:1.45;letter-spacing:.015em;text-wrap:balance;text-shadow:0 2px 12px #0002}.xz-hero-copy p{margin-top:14px;font-size:18px;line-height:1.7;white-space:pre-line}.xz-footer{background:#fff;text-align:center;padding:34px 18px;color:#718096;font-size:14px;line-height:2}.xz-footer a{color:#567396}.xz-credit{margin-top:4px}.xz-page{max-width:1100px;min-height:60vh;padding:55px 24px 75px;box-sizing:border-box}.xz-page h1{font-size:30px;margin-bottom:30px}.xz-about{white-space:normal;line-height:2;font-size:17px}.xz-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}.xz-links a{display:flex;flex-direction:column;gap:12px;background:#fff;border-radius:12px;padding:24px;box-shadow:0 8px 25px #26344b08}.xz-links span{color:#8390a0;font-size:14px}.xz-search{width:min(540px,calc(100% - 48px));border:0;border-radius:12px;padding:32px;box-sizing:border-box;color:#354254}.xz-search::backdrop{background:#15263f99;backdrop-filter:blur(4px)}.xz-search h2{font-size:24px;margin-bottom:24px}.xz-search label{display:block;margin-bottom:10px}.xz-search-row{display:flex;gap:10px}.xz-search input{min-width:0;flex:1;border:1px solid #cbd5e1;border-radius:6px;padding:12px;font-size:16px}.xz-search-row button{background:#3c567a;color:#fff;border:0;border-radius:6px;padding:12px 18px;cursor:pointer}.xz-search-close{float:right;border:0;background:none;font-size:28px;cursor:pointer}.main.fixed{padding-top:25px}.main{min-height:60vh}img{max-width:100%}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media(max-width:700px){.xz-header{height:66px}.xz-navwrap{padding:0 20px}.xz-brand{font-size:21px}.xz-menu{display:block;font-size:23px}.xz-nav{display:none;position:absolute;left:0;right:0;top:66px;flex-direction:column;align-items:stretch;gap:0;padding:12px 20px;background:#344e70}.xz-nav.is-open{display:flex}.xz-nav a{padding:12px}.xz-nav button{align-self:flex-start}.xz-hero{min-height:480px}.xz-hero-copy h1{font-size:26px;line-height:1.5}.xz-page{padding:35px 20px}.xz-footer .wrap{width:auto}.xz-search{padding:24px}.xz-search-row{flex-wrap:wrap}}/* Navigation uses the Z-Blog navbar module managed in the dashboard. */
.xz-nav-items{display:flex;align-items:center;gap:28px;margin:0;padding:0;list-style:none}.xz-nav-items>li{position:relative;list-style:none}.xz-nav-items>li>a{display:block;padding:12px 0}.xz-nav-items .subnav,.xz-nav-items li>ul{display:none;position:absolute;top:100%;left:0;min-width:180px;padding:8px;background:#344e70;border-radius:8px;box-shadow:0 8px 24px #0002;list-style:none}.xz-nav-items li:hover>.subnav,.xz-nav-items li:focus-within>.subnav,.xz-nav-items li:hover>ul,.xz-nav-items li:focus-within>ul{display:block}.xz-nav-items .subnav a,.xz-nav-items li>ul a{display:block;padding:10px 14px;white-space:nowrap}.xz-nav-items>.subcate>a:after{content:' ▾';font-size:12px}@media(max-width:700px){.xz-nav-items{display:block;width:100%}.xz-nav-items>li>a{padding:12px}.xz-nav-items .subnav,.xz-nav-items li>ul{display:block;position:static;background:transparent;box-shadow:none;padding:0 0 4px 20px}.xz-nav-items .subnav a{font-size:15px}}
.xz-page-content{font-size:17px;line-height:1.9;margin-bottom:30px}.xz-page-content p{margin:12px 0}.xz-page-content a{color:#3c668e}.xz-article-item{padding:24px 0;border-bottom:1px solid #e1e6ec}.xz-article-item h2{font-size:23px;margin-bottom:12px}.xz-article-item p,.xz-article-item time{color:#718096}.xz-pagination{display:flex;gap:24px;margin-top:30px}
/* Keep the footer at the viewport edge on short pages. */
body{margin:0}body>.wrapper{min-height:100vh;min-height:100svh;display:flex;flex-direction:column}.xz-header,.xz-hero,.xz-footer{flex-shrink:0}.xz-footer{margin-top:auto}.xz-page{min-height:0;width:100%}.xz-pagination:empty{display:none}.xz-page .xz-article-list{width:100%}

/* Navigation page: editable banner and editorial link list. */
.xz-navigation .wrapper{position:relative;background:#eee}.xz-navigation .xz-header{position:absolute;inset:0 0 auto;background:#24334840;backdrop-filter:blur(5px)}
.xz-navigation-hero{height:460px;flex-shrink:0;position:relative;display:flex;align-items:center;justify-content:center;box-sizing:border-box;padding:100px 24px 50px;overflow:hidden;background:#3c567a}
.xz-navigation-hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.xz-navigation-hero:after{content:"";position:absolute;inset:0;background:#13203340}.xz-navigation-hero h1{position:relative;z-index:1;color:#fff;font-size:36px;line-height:1.5;text-align:center;text-shadow:0 2px 10px #0004}
.xz-navigation-panel{position:relative;z-index:2;box-sizing:border-box;width:calc(100% - 48px);max-width:1160px;margin:-34px auto 54px;padding:56px 72px;background:#fff;border-radius:9px;box-shadow:0 10px 32px #0002}
.xz-navigation-panel .xz-page-content{margin:0;color:#3c4858;font-size:17px;line-height:2}.xz-navigation-panel h2{font-size:26px;margin:24px 0}.xz-navigation-panel h3{font-size:21px;margin:20px 0}.xz-navigation-panel ul{padding-left:26px;list-style:disc}.xz-navigation-panel li{margin:12px 0;list-style:disc}.xz-navigation-panel a{color:#3c4858}.xz-navigation-panel a:hover{color:#587696}.xz-navigation-panel .xz-links{display:block}.xz-navigation-panel .xz-links>a{display:block;border-radius:0;padding:13px 0;background:none;box-shadow:none}.xz-navigation-panel .xz-links>a:before{content:"•  ";margin-right:12px}.xz-navigation-panel .xz-links strong{margin-right:18px}.xz-navigation-panel .xz-links span{display:inline}.xz-navigation-panel img{height:auto;max-width:100%}
@media(max-width:700px){.xz-navigation-hero{height:340px}.xz-navigation-hero h1{font-size:29px}.xz-navigation-panel{width:calc(100% - 28px);margin:-24px auto 30px;padding:28px 22px}.xz-navigation-panel .xz-links>a{overflow-wrap:anywhere}.xz-navigation-panel .xz-links strong{margin-right:10px}}

.xz-tool-directory .xz-tools-title{text-align:center;font-size:23px;letter-spacing:4px;margin:0 0 38px}.xz-tool-directory h3{font-size:27px;font-weight:500;margin:30px 0 22px}.xz-tool-directory li{margin:17px 0}.xz-tool-directory a{font-size:18px;font-weight:600}

.xz-profile{text-align:center;margin-top:-135px;position:relative}.xz-profile .xz-avatar{width:160px;height:160px;border-radius:50%;object-fit:cover;margin:0 auto 22px;box-shadow:0 4px 12px #0003;border:5px solid white}.xz-avatar-placeholder{display:flex;align-items:center;justify-content:center;background:#3c7897;color:white;font-size:64px;box-sizing:border-box}.xz-profile h2{font-size:30px;margin:16px 0}.xz-profile-description{line-height:1.8}.xz-contacts{display:flex;justify-content:center;flex-wrap:wrap;gap:22px;margin:18px 0 40px}.xz-contacts details{max-width:220px;overflow-wrap:anywhere}.xz-contacts summary{cursor:pointer;color:#3c4858}.xz-contacts details img{display:block;margin:10px auto}.xz-about-body{border-top:1px solid #e6eaf0;padding-top:30px}.xz-about-body blockquote{background:#e7f1f9;border-left:5px solid #5a83ad;padding:14px 20px;margin:20px 0}.xz-voyage{margin-top:12px;font-variant-numeric:tabular-nums}@media(max-width:700px){.xz-profile{margin-top:-88px}.xz-profile .xz-avatar{width:120px;height:120px}.xz-profile h2{font-size:26px}}

/* Footer shares its page background; contact icons remain local assets. */
.xz-footer{background:transparent}.xz-backtop{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border:0;border-radius:5px;background:#fff;color:#718096;box-shadow:0 2px 10px #0003;z-index:90;cursor:pointer;padding:10px}.xz-backtop[hidden]{display:none}.xz-backtop svg{width:100%;height:100%}.xz-backtop:hover{color:#3c567a}.xz-backtop:focus-visible,.xz-contacts a:focus-visible,.xz-contacts summary:focus-visible{outline:2px solid #3c7897;outline-offset:4px}.xz-contacts{align-items:center;gap:17px}.xz-contacts>a,.xz-contacts summary{display:flex;align-items:center;justify-content:center;color:#3c4858;width:28px;height:30px;cursor:pointer}.xz-contacts svg{width:27px;height:27px;fill:currentColor}.xz-contacts details{position:relative;overflow:visible}.xz-contacts summary{list-style:none}.xz-contacts summary::-webkit-details-marker{display:none}.xz-contact-popover{position:absolute;top:40px;left:50%;transform:translateX(-50%);min-width:170px;max-width:230px;padding:14px;background:white;border:1px solid #e6eaf0;border-radius:8px;box-shadow:0 6px 24px #0002;z-index:95;line-height:1.7;overflow-wrap:anywhere}.xz-contacts a:hover,.xz-contacts summary:hover{color:#587696}@media(max-width:700px){.xz-backtop{right:16px;bottom:20px;width:40px;height:40px}}
.xz-footer{padding:34px 18px 12px}.xz-footer img{vertical-align:middle}

.xz-blog-panel .xz-article-item{display:grid;grid-template-columns:280px minmax(0,1fr);gap:30px;padding:24px 0;border:0}.xz-list-image img{width:100%;height:175px;object-fit:cover;border-radius:6px;box-shadow:0 5px 12px #0003}.xz-list-copy h2{margin:8px 0 14px;font-size:25px;line-height:1.4}.xz-list-copy h2 a{color:#3c4858}.xz-list-copy>p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;line-height:1.7;color:#718096}.xz-list-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:14px;margin-top:16px;color:#718096}.xz-list-meta a{color:#718096}.xz-post-heading{position:relative;z-index:1;color:white;text-align:center;max-width:1000px}.xz-post-heading p{margin:12px 0;font-size:16px}.xz-post-layout{display:grid;grid-template-columns:minmax(0,1000px) 210px;gap:28px;width:calc(100% - 48px);max-width:1280px;margin:-34px auto 54px;position:relative;z-index:2;align-items:start}.xz-post-paper{width:100%;margin:0;padding:48px 65px}.xz-toc{position:sticky;top:30px;padding-top:55px;max-height:85vh;overflow:auto}.xz-toc[hidden]{display:none}.xz-toc h2{font-size:22px;margin-bottom:14px}.xz-toc a{display:block;padding:5px 10px;border-left:2px solid transparent;color:#3c4858;font-size:15px;line-height:1.6}.xz-toc .xz-toc-sub{padding-left:26px}.xz-toc a.is-active{border-color:#3c567a;color:#3c567a}.xz-post-content{overflow-wrap:anywhere}.xz-post-content h2,.xz-post-content h3{scroll-margin-top:35px;color:#252c38}.xz-post-content h2{border-bottom:1px solid #e4e8ef;padding-bottom:10px;margin-top:35px}.xz-post-content blockquote{border-left:4px solid #dfe3e8;padding:0 20px;color:#718096;margin:20px 0}.xz-post-content pre{overflow:auto;padding:20px;background:#f5f7f9;border-radius:5px}.xz-post-content table{display:block;overflow:auto;max-width:100%}.xz-post-layout:not(:has(.xz-toc:not([hidden]))){grid-template-columns:minmax(0,1000px);justify-content:center}@media(max-width:900px){.xz-post-layout{grid-template-columns:minmax(0,1fr)}.xz-toc{position:static;grid-row:1;padding:20px;background:#fff;border-radius:8px;max-height:260px}.xz-post-paper{padding:32px 24px}.xz-blog-panel .xz-article-item{grid-template-columns:220px minmax(0,1fr);gap:20px}}@media(max-width:600px){.xz-blog-panel .xz-article-item{grid-template-columns:1fr;gap:12px}.xz-list-image img{height:190px}.xz-list-copy h2{font-size:22px}.xz-post-layout{width:calc(100% - 28px)}.xz-post-heading h1{font-size:26px}}
.xz-list-copy h2{font-weight:700}.xz-post-heading h1{font-weight:600}
.xz-post-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:44px;padding-top:26px;border-top:1px solid #e4e8ef}.xz-post-nav a,.xz-post-nav span{display:flex;flex-direction:column;gap:5px;padding:15px 18px;border-radius:8px;background:#f6f8fb;color:#3c4858}.xz-post-nav small{color:#718096}.xz-post-nav .xz-post-next{text-align:right}.xz-related{margin-top:34px}.xz-related h2{font-size:23px;border-bottom:1px solid #e4e8ef;padding-bottom:10px}.xz-related ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:10px 24px}.xz-related li{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-bottom:1px dashed #e4e8ef}.xz-related time{white-space:nowrap;color:#8a96a8;font-size:13px}.xz-webp-panel{width:calc(100% - 48px);max-width:1200px;margin:-40px auto 54px;position:relative;z-index:2;padding:46px 60px}.xz-webp-page .xz-navigation-hero h1{position:relative;z-index:1;color:#fff;font-size:38px}.xz-webp-page .xz-webp{box-shadow:none;padding-left:0;padding-right:0}@media(max-width:600px){.xz-post-nav,.xz-related ul{grid-template-columns:1fr}.xz-post-nav .xz-post-next{text-align:left}.xz-related li{display:block}.xz-webp-panel{width:calc(100% - 28px);padding:28px 18px}}
.xz-webp-page .xz-navigation-hero{height:210px}
.xz-webp-page .xz-navigation-hero h1{font-size:34px}
.xz-webp-panel{margin-top:-24px}
@media(min-width:851px){.xz-webp-page .xz-navigation-hero{height:130px}.xz-webp-page .xz-navigation-hero h1{font-size:27px}.xz-webp-panel{margin-top:-20px}}
@media(max-width:600px){.xz-webp-page .xz-navigation-hero{height:175px}.xz-webp-page .xz-navigation-hero h1{font-size:27px}.xz-webp-panel{margin-top:-16px}}
.xz-contacts>a,.xz-contacts>details,.xz-contacts summary{display:flex;align-items:center;justify-content:center;width:32px;height:32px;margin:0;padding:0;line-height:0;box-sizing:border-box}.xz-contacts svg{display:block;width:28px;height:28px;vertical-align:middle}
.xz-contacts>a[aria-label="RSS订阅"] svg{transform:translateY(-4px)}
.xz-books-panel{width:calc(100% - 48px);max-width:1200px;margin:-40px auto 54px;position:relative;z-index:2;padding:46px 60px}.xz-books-page .xz-navigation-hero h1{position:relative;z-index:1;color:#fff;font-size:38px}.xz-bookshelf{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px;margin-top:28px}.xz-book-card{text-align:center;padding:18px;border:1px solid #e5e9ef;border-radius:10px;background:#fff;box-shadow:0 4px 14px #26314212}.xz-book-card img,.xz-book-cover-placeholder{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:6px;background:#eef2f7;display:flex;align-items:center;justify-content:center;font-size:64px}.xz-book-card h2{font-size:19px;margin:14px 0 6px}.xz-book-card p{color:#7a8798;font-size:13px}.xz-book-card button{border:0;border-radius:5px;background:#3c567a;color:#fff;padding:9px 20px;cursor:pointer}.xz-books-empty{grid-column:1/-1;text-align:center;color:#718096}.xz-reader{width:min(1100px,96vw);height:min(850px,94vh);padding:0;border:0;border-radius:10px;background:#f7f3e8;color:#263142;box-shadow:0 20px 70px #0008}.xz-reader::backdrop{background:#15202dcc}.xz-reader>header,.xz-reader>nav,.xz-reader>footer{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 18px;background:#ebe4d3}.xz-reader>header div,.xz-reader>nav{display:flex;flex-wrap:wrap;align-items:center;gap:9px}.xz-reader button,.xz-reader select{border:1px solid #bdc6d1;border-radius:5px;padding:7px 10px;background:#fff;color:#263142}.xz-reader-stage{height:calc(100% - 142px);overflow:auto;padding:24px 7%;box-sizing:border-box}.xz-reader-stage canvas{display:block;max-width:100%;margin:auto;box-shadow:0 3px 16px #0002}.xz-reader-stage #xz-txt-view{white-space:pre-wrap;line-height:2;font-size:18px;max-width:760px;margin:auto}.xz-reader-stage #xz-epub-view{height:100%}.xz-reader.is-dark{background:#18212d;color:#e8edf4}.xz-reader.is-dark>header,.xz-reader.is-dark>nav,.xz-reader.is-dark>footer{background:#101720}.xz-reader.is-dark button,.xz-reader.is-dark select{background:#263142;color:#e8edf4;border-color:#536174}.xz-reader.is-dark canvas{filter:invert(.9) hue-rotate(180deg)}@media(max-width:900px){.xz-bookshelf{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.xz-books-panel{width:calc(100% - 28px);padding:28px 18px}.xz-bookshelf{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.xz-reader>header{align-items:flex-start}.xz-reader>header div{justify-content:flex-end}.xz-reader-stage{padding:18px 5%;height:calc(100% - 185px)}}
.xz-reader-stage>[hidden]{display:none!important}
.xz-book-card h2 a{color:#263142;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;text-overflow:ellipsis}.xz-book-card h2{height:2.9em;line-height:1.45;margin-bottom:16px;overflow:hidden}.xz-book-detail{display:grid;gap:36px}.xz-book-detail-head{display:grid;grid-template-columns:220px minmax(0,1fr);gap:34px;align-items:center}.xz-book-detail-head>img,.xz-book-detail-head>.xz-book-cover-placeholder{width:220px;aspect-ratio:3/4;object-fit:cover;border-radius:8px}.xz-book-title{font-size:30px;margin:0 0 16px;color:#354254}.xz-book-start,.xz-book-detail-link{display:inline-block;border:0;border-radius:5px;background:#3c567a;color:#fff!important;font-weight:600;text-decoration:none!important;padding:10px 20px;cursor:pointer}.xz-book-start:hover,.xz-book-detail-link:hover{background:#304866;color:#fff!important}.xz-book-description{border-top:1px solid #e4e8ef;padding-top:28px}.xz-book-unavailable{color:#9b2c2c}@media(max-width:600px){.xz-book-detail-head{grid-template-columns:110px minmax(0,1fr);gap:18px}.xz-book-detail-head>img,.xz-book-detail-head>.xz-book-cover-placeholder{width:110px}.xz-book-title{font-size:23px}}
/* Three links per row within each navigation category. */
.xz-tool-directory ul{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:30px;row-gap:8px;margin:0 0 34px;padding:0;list-style:none}.xz-tool-directory li{list-style:none;margin:0;min-width:0}.xz-tool-directory li a{display:block;padding:12px 8px;line-height:1.7;overflow-wrap:anywhere}.xz-tool-directory h3{margin-top:32px}.xz-tool-directory li a:hover{background:#f4f7fa;border-radius:6px}@media(max-width:800px){.xz-tool-directory ul{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px}}@media(max-width:480px){.xz-tool-directory ul{grid-template-columns:1fr}.xz-tool-directory li a{padding:9px 4px}}
.xz-tool-directory h3{display:flex;align-items:center;gap:9px}.xz-directory-group-icon{display:inline-block;flex:0 0 auto;width:auto;height:auto;border:0;border-radius:0;background:none;color:inherit;font-size:26px;font-weight:400;line-height:1;box-shadow:none}.xz-tool-directory li a{display:flex;align-items:center;gap:10px}.xz-directory-link-icon{display:inline-block;flex:0 0 22px;width:22px;background:none;color:inherit;font-size:18px;font-weight:400;line-height:1;text-align:center;transition:transform .18s ease}.xz-tool-directory li a:hover .xz-directory-link-icon{transform:translateY(-1px)}@media(max-width:480px){.xz-directory-group-icon{font-size:23px}.xz-directory-link-icon{flex-basis:21px;width:21px;font-size:17px}}
/* Shared translucent navigation treatment, including non-hero pages. */
.xz-header,.xz-home .xz-header,.xz-navigation .xz-header{background:rgba(41,69,106,.21);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px)}
body:not(.xz-home):not(.xz-navigation) .xz-header .xz-brand,body:not(.xz-home):not(.xz-navigation) .xz-header .xz-nav-items>li>a,body:not(.xz-home):not(.xz-navigation) .xz-header .xz-search-open,body:not(.xz-home):not(.xz-navigation) .xz-header .xz-menu{color:#354254!important}

/* Book detail presentation and image-led recommendations. */
.xz-book-detail-head{width:min(820px,100%);margin:0 auto;padding:34px 44px;box-sizing:border-box;background:linear-gradient(135deg,#f8fafc 0%,#f1f5fa 100%);border:1px solid #e1e8f0;border-radius:16px;box-shadow:0 12px 32px rgba(38,49,66,.09)}
.xz-book-detail-head>img,.xz-book-detail-head>.xz-book-cover-placeholder{width:210px;box-shadow:0 10px 25px rgba(28,37,51,.18)}
.xz-book-detail-copy{padding-left:4px}
.xz-book-eyebrow{display:block;margin-bottom:9px;color:#8a98aa;font-size:12px;font-weight:700;letter-spacing:.2em}
.xz-book-title{font-size:34px;line-height:1.25;margin-bottom:9px}.xz-book-author{margin-bottom:20px;color:#718096;font-size:15px}
.xz-book-description{width:min(960px,100%);margin:8px auto 0;box-sizing:border-box}
.xz-book-detail>.xz-post-nav,.xz-book-detail>.xz-related{width:min(960px,100%);margin-left:auto;margin-right:auto;box-sizing:border-box}
.xz-related{margin-top:42px;padding-top:6px}.xz-related h2{font-size:23px;margin-bottom:18px}
.xz-related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.xz-related-card{min-width:0;border:1px solid #e4e9f0;border-radius:10px;background:#fff;overflow:hidden;box-shadow:0 5px 18px rgba(38,49,66,.07);transition:transform .2s ease,box-shadow .2s ease}
.xz-related-card:hover{transform:translateY(-3px);box-shadow:0 10px 25px rgba(38,49,66,.12)}
.xz-related-image{display:block;aspect-ratio:8/5;overflow:hidden;background:#edf1f6}.xz-related-image img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .25s ease}.xz-related-card:hover img{transform:scale(1.035)}
.xz-related-card h3{font-size:16px;line-height:1.5;margin:0;padding:13px 15px 16px}.xz-related-card h3 a{color:#354254}
.xz-book-related .xz-related-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.xz-book-related .xz-related-image{aspect-ratio:3/4}
.xz-book-related .xz-related-card h3{text-align:center}
@media(max-width:800px){.xz-book-detail-head{grid-template-columns:170px minmax(0,1fr);padding:26px}.xz-book-detail-head>img,.xz-book-detail-head>.xz-book-cover-placeholder{width:170px}.xz-related-grid,.xz-book-related .xz-related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.xz-book-detail-head{grid-template-columns:105px minmax(0,1fr);gap:18px;padding:18px;border-radius:12px}.xz-book-detail-head>img,.xz-book-detail-head>.xz-book-cover-placeholder{width:105px}.xz-book-title{font-size:24px;margin-bottom:14px}.xz-book-eyebrow{font-size:10px}.xz-related-grid,.xz-book-related .xz-related-grid{gap:12px}.xz-related-card h3{font-size:14px;padding:10px 11px 12px}}
.xz-voice-control{display:flex;align-items:center;gap:6px;font-size:13px}.xz-voice-control select{max-width:190px;padding:6px 8px}
@media(max-width:600px){.xz-voice-control{width:100%;justify-content:flex-end}.xz-voice-control select{max-width:160px}.xz-book-author{font-size:13px;margin-bottom:12px}}

/* Compact blog banner and persistent day/night mode. */
.xz-blog .xz-navigation-hero{height:405px}
.xz-theme-toggle{display:grid;place-items:center;width:38px;height:38px;padding:0!important;border-radius:50%!important;font-family:Arial,sans-serif;font-size:24px!important;line-height:1;transition:background .2s ease,transform .2s ease}
.xz-theme-toggle:hover{background:#ffffff22!important;transform:rotate(10deg)}
@media(max-width:700px){.xz-blog .xz-navigation-hero{height:300px}.xz-theme-toggle{align-self:flex-start!important;margin:5px 0 3px 2px}}

html[data-theme="dark"]{color-scheme:dark}
html[data-theme="dark"] body,html[data-theme="dark"] .xz-navigation .wrapper,html[data-theme="dark"] body>.wrapper{background:#0f1722;color:#dbe5f1}
html[data-theme="dark"] .xz-navigation-panel,html[data-theme="dark"] .xz-page,html[data-theme="dark"] .xz-week-card,html[data-theme="dark"] .xz-books-panel,html[data-theme="dark"] .xz-post-paper,html[data-theme="dark"] .xz-book-card,html[data-theme="dark"] .xz-related-card,html[data-theme="dark"] .xz-footer,html[data-theme="dark"] .xz-search{background:#182331;color:#dbe5f1;border-color:#334255}
html[data-theme="dark"] .xz-navigation-panel .xz-page-content,html[data-theme="dark"] .xz-navigation-panel a,html[data-theme="dark"] .xz-list-copy h2 a,html[data-theme="dark"] .xz-book-card h2 a,html[data-theme="dark"] .xz-related-card h3 a,html[data-theme="dark"] .xz-book-title,html[data-theme="dark"] .xz-post-content h2,html[data-theme="dark"] .xz-post-content h3{color:#e8eef6}
html[data-theme="dark"] .xz-article-item,html[data-theme="dark"] .xz-post-nav,html[data-theme="dark"] .xz-book-description,html[data-theme="dark"] .xz-related{border-color:#334255}
html[data-theme="dark"] .xz-article-item p,html[data-theme="dark"] .xz-article-item time,html[data-theme="dark"] .xz-list-copy>p,html[data-theme="dark"] .xz-list-meta,html[data-theme="dark"] .xz-list-meta a,html[data-theme="dark"] .xz-page-content p,html[data-theme="dark"] .xz-footer,html[data-theme="dark"] .xz-calendar-note{color:#a8b6c8}

html[data-theme="dark"] input,html[data-theme="dark"] select,html[data-theme="dark"] textarea,html[data-theme="dark"] .xz-query-result,html[data-theme="dark"] .xz-upload{background:#101925;color:#e7edf5;border-color:#405067}
html[data-theme="dark"] .xz-calendar-wrap,html[data-theme="dark"] .xz-calendar td,html[data-theme="dark"] .xz-calendar th,html[data-theme="dark"] .xz-calendar .xz-week-no{background:#152231;color:#dbe5f1;border-color:#334255}
html[data-theme="dark"] .xz-week-tabs,html[data-theme="dark"] .xz-calendar-nav button:first-child,html[data-theme="dark"] .xz-calendar-nav button:last-child,html[data-theme="dark"] .xz-week-card #xz-month-today{background:#223044;color:#dbe5f1;border-color:#405067}
html[data-theme="dark"] .xz-day:not(.is-selected){color:#dbe5f1}
html[data-theme="dark"] .xz-book-detail-head{background:linear-gradient(135deg,#182331,#111b28);border-color:#334255}
html[data-theme="dark"] .xz-tool-directory li a:hover,html[data-theme="dark"] .xz-post-nav a,html[data-theme="dark"] .xz-post-nav span{background:#223044;color:#e8eef6}
html[data-theme="dark"] .pagebar{background:#182331!important;border-color:#334255!important}
html[data-theme="dark"] .pagebar>a,html[data-theme="dark"] .pagebar .now-page,html[data-theme="dark"] .pagebar .next-page>a{background:#223044!important;color:#dbe5f1!important;border-color:#405067!important}
html[data-theme="dark"] .pagebar .now-page{background:#3c638f!important;color:#fff!important}

/* Dark-mode fixes for rich page content and tool-specific panels. */
html[data-theme="dark"] .xz-about-body,html[data-theme="dark"] .xz-about-body *{background-color:transparent!important;background-image:none!important}
html[data-theme="dark"] .xz-about-body,html[data-theme="dark"] .xz-about-body h1,html[data-theme="dark"] .xz-about-body h2,html[data-theme="dark"] .xz-about-body h3,html[data-theme="dark"] .xz-about-body h4,html[data-theme="dark"] .xz-about-body p,html[data-theme="dark"] .xz-about-body span,html[data-theme="dark"] .xz-about-body strong,html[data-theme="dark"] .xz-about-body em{color:#dbe5f1!important}
html[data-theme="dark"] .xz-about-body blockquote{background:#223449!important;border-color:#5a83ad;color:#cbd7e5!important}
html[data-theme="dark"] .xz-profile h2,html[data-theme="dark"] .xz-profile-description,html[data-theme="dark"] .xz-contacts summary{color:#e7edf5}
html[data-theme="dark"] .xz-contact-popover{background:#213044;border-color:#50647d;color:#eef4fb;box-shadow:0 8px 28px #0008}
html[data-theme="dark"] .xz-contact-popover,html[data-theme="dark"] .xz-contact-popover *{color:#eef4fb!important}
html[data-theme="dark"] .xz-webp{background:#182331!important;color:#dbe5f1}
html[data-theme="dark"] .xz-webp p,html[data-theme="dark"] .xz-webp label,html[data-theme="dark"] #xz-progress{color:#aebcd0!important}
html[data-theme="dark"] .xz-webp-settings{background:transparent!important}
html[data-theme="dark"] .xz-week-guide{background:#182331;color:#dbe5f1;border-color:#334255}
html[data-theme="dark"] .xz-week-guide .xz-page-content,html[data-theme="dark"] .xz-week-guide h2,html[data-theme="dark"] .xz-week-guide h3,html[data-theme="dark"] .xz-week-guide p,html[data-theme="dark"] .xz-week-guide summary{color:#c5d1df}
html[data-theme="dark"] .xz-week-guide h2,html[data-theme="dark"] .xz-week-guide h3,html[data-theme="dark"] .xz-week-card h2,html[data-theme="dark"] .xz-year-total-copy h2{color:#e7edf5}
html[data-theme="dark"] .xz-week-app,html[data-theme="dark"] .xz-week-card form label,html[data-theme="dark"] .xz-year-total-copy>p:last-child,html[data-theme="dark"] .xz-year-result small{color:#aebcd0}
html[data-theme="dark"] .xz-query-result{background:#101925;color:#c5d1df;border-color:#526f90}
html[data-theme="dark"] .xz-query-result strong{color:#e7edf5}
html[data-theme="dark"] .xz-year-counts span{background:#1d2b3b;color:#c5d1df;border-color:#405067}
html[data-theme="dark"] .xz-week-card .xz-year-shortcuts button,html[data-theme="dark"] .xz-week-card .xz-date-shortcuts button{background:#26384d;color:#dbe5f1}
html[data-theme="dark"] .xz-calendar-nav strong,html[data-theme="dark"] .xz-calendar-intro h2{color:#e7edf5}
html[data-theme="dark"] .xz-week-card .xz-week-tab{color:#aebcd0}
html[data-theme="dark"] .xz-week-card .xz-week-tab:hover{background:#26384d;color:#fff}
html[data-theme="dark"] .xz-week-card .xz-week-tab.is-active,html[data-theme="dark"] .xz-week-card .xz-week-tab.is-active:hover{background:linear-gradient(135deg,#4f7199,#3f5e84);color:#fff}
html[data-theme="dark"] .xz-answer-detail,html[data-theme="dark"] .xz-mode-summary{color:#aebcd0}
html[data-theme="dark"] .xz-week-kicker{color:#91a8c2}
html[data-theme="dark"] .xz-lunar{color:#9eacbd}

/* Pagination follows the theme button palette. */
.xz-navigation-panel .pagebar{display:flex;justify-content:center;align-items:center;gap:7px;margin-top:28px;padding:18px 0;background:transparent;border:0}
.xz-navigation-panel .pagebar>a,.xz-navigation-panel .pagebar .now-page,.xz-navigation-panel .pagebar .next-page>a{box-sizing:border-box;min-width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;margin:0;padding:0 12px;border:1px solid #d8e0e9;border-radius:6px;background:#f7f9fb;color:#52657b;line-height:1;text-decoration:none;transition:background .18s ease,border-color .18s ease,color .18s ease}
.xz-navigation-panel .pagebar .next-page{display:contents;margin:0;padding:0;border:0;background:transparent}
.xz-navigation-panel .pagebar a:hover{border-color:#7890aa;background:#eaf0f6;color:#304967}
.xz-navigation-panel .pagebar .now-page{border-color:#3c567a;background:#3c567a;color:#fff;font-weight:700}
html[data-theme="dark"] .xz-navigation-panel .pagebar{background:transparent!important}
html[data-theme="dark"] .xz-navigation-panel .pagebar>a,html[data-theme="dark"] .xz-navigation-panel .pagebar .now-page,html[data-theme="dark"] .xz-navigation-panel .pagebar .next-page>a{background:#223044!important;color:#cbd7e5!important;border-color:#405067!important}
html[data-theme="dark"] .xz-navigation-panel .pagebar a:hover{background:#2d425a!important;color:#fff!important;border-color:#6682a1!important}
html[data-theme="dark"] .xz-navigation-panel .pagebar .now-page{background:#4a6b91!important;color:#fff!important;border-color:#4a6b91!important}
.xz-webp input[type="checkbox"]{accent-color:#3c567a}
html[data-theme="dark"] .xz-webp input[type="checkbox"]{accent-color:#5f82aa}

/* Compact navigation that remains visible while the page scrolls. */
.xz-header,.xz-home .xz-header,.xz-navigation .xz-header{
 position:fixed;
 inset:0 0 auto;
 height:64px;
 z-index:120;
 background:rgba(41,69,106,.48);
 -webkit-backdrop-filter:blur(8px);
 backdrop-filter:blur(8px);
 box-shadow:0 2px 12px rgba(15,27,44,.16)
}

/* Stable mobile book actions and an iOS-safe reading gesture surface. */
.xz-book-detail-link{display:inline-flex;align-items:center;justify-content:center;white-space:nowrap}
.xz-reader-gesture{display:none}
@media(max-width:1024px){
 .xz-book-detail-link{box-sizing:border-box;width:100%;padding:10px 8px;font-size:16px;line-height:1.4;white-space:nowrap}
 .xz-reader-stage{position:relative}
 .xz-reader-gesture{display:block;position:absolute;inset:0;z-index:3;background:transparent;touch-action:pan-y;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}
}
.xz-navwrap{padding:0 32px;gap:22px}
.xz-brand{font-size:23px}
.xz-nav,.xz-nav-items{gap:22px}
.xz-nav a,.xz-nav button{font-size:16px}
body:not(.xz-home):not(.xz-navigation)>.wrapper{padding-top:64px;box-sizing:border-box}
html{scroll-padding-top:76px}
@media(max-width:700px){
 .xz-header,.xz-home .xz-header,.xz-navigation .xz-header{height:56px}
 .xz-navwrap{padding:0 18px}
 .xz-brand{font-size:20px}
 .xz-menu{font-size:21px}
 .xz-nav{top:56px;max-height:calc(100vh - 56px);overflow-y:auto}
 body:not(.xz-home):not(.xz-navigation)>.wrapper{padding-top:56px}
 html{scroll-padding-top:68px}
}

/* Use the BLOG banner proportions across standard content pages. */
.xz-navigation-hero{height:405px}
@media(max-width:700px){.xz-navigation-hero{height:300px}}

/* Mobile tool groups behave as collapsible submenus. */
@media(max-width:700px){
 .xz-nav .xz-nav-items li:not(.is-submenu-open)>.subnav,.xz-nav .xz-nav-items li:not(.is-submenu-open)>ul{display:none}
 .xz-nav .xz-nav-items li.is-submenu-open>.subnav,.xz-nav .xz-nav-items li.is-submenu-open>ul{display:block}
 .xz-nav-items>.subcate>a:after{display:inline-block;transition:transform .18s ease}
 .xz-nav-items>.subcate.is-submenu-open>a:after{transform:rotate(180deg)}
}

/* Copyright disclaimer page. */
.xz-disclaimer{width:min(900px,100%);margin:0 auto;color:#465568}
.xz-disclaimer-lead{margin:0 0 24px;font-size:19px;line-height:1.9;color:#334155}
.xz-disclaimer-notice{margin:0 0 34px;padding:18px 22px;border-left:5px solid #4a6b91;border-radius:6px;background:#eef3f8;line-height:1.8}
.xz-disclaimer section{padding:6px 0 18px;border-bottom:0}
.xz-disclaimer section:last-of-type{border-bottom:0}
.xz-disclaimer h2{margin:22px 0 12px;font-size:23px;color:#27364a}
.xz-disclaimer p,.xz-disclaimer li{font-size:16px;line-height:1.9}
.xz-disclaimer ol{padding-left:26px}
.xz-disclaimer-source{margin-top:28px;padding-top:22px;border-top:0;color:#718096;font-size:14px!important}
html[data-theme="dark"] .xz-disclaimer,html[data-theme="dark"] .xz-disclaimer-lead,html[data-theme="dark"] .xz-disclaimer h2{color:#dbe5f1}
html[data-theme="dark"] .xz-disclaimer-notice{background:#223449;border-color:#6688ad;color:#dbe5f1}
html[data-theme="dark"] .xz-disclaimer section,html[data-theme="dark"] .xz-disclaimer-source{border-color:#334255}
@media(max-width:600px){.xz-disclaimer-lead{font-size:17px}.xz-disclaimer-notice{padding:15px 17px}.xz-disclaimer h2{font-size:21px}}

/* Balanced spacing between book copy, pagination and recommendations. */
.xz-book-detail{gap:28px}
.xz-book-description>p:empty{display:none}
.xz-book-detail>.xz-post-nav,.xz-book-detail>.xz-related{margin-top:0}
@media(max-width:600px){.xz-book-detail{gap:24px}}

/* Hero navigation: transparent at the top, frosted glass after scrolling. */
.xz-home .xz-header,.xz-navigation .xz-header{
 background:transparent;
 -webkit-backdrop-filter:none;
 backdrop-filter:none;
 box-shadow:0 2px 5px rgba(0,0,0,.16),0 2px 10px rgba(0,0,0,.12);
 transition:background-color .24s ease,backdrop-filter .24s ease,box-shadow .24s ease
}
.xz-home .xz-header.is-scrolled,.xz-navigation .xz-header.is-scrolled,
.xz-home .xz-header.is-menu-open,.xz-navigation .xz-header.is-menu-open{
 background:rgba(31,49,75,.58);
 -webkit-backdrop-filter:blur(14px) saturate(135%);
 backdrop-filter:blur(14px) saturate(135%);
 box-shadow:0 2px 14px rgba(10,20,35,.2)
}

/* Transparent glass dropdown matching the hero navigation. */
@media(min-width:701px){
 .xz-nav-items .subnav,.xz-nav-items li>ul{
  background:rgba(24,35,50,.52);
  border:1px solid rgba(255,255,255,.12);
  -webkit-backdrop-filter:blur(12px) saturate(130%);
  backdrop-filter:blur(12px) saturate(130%);
  box-shadow:0 10px 28px rgba(8,18,31,.2)
 }
}

/* Reference-style canvas particles: small, soft white bubbles rising over the hero. */
.xz-bubbles{position:absolute;inset:auto 0 0;z-index:1;width:100%;height:380px;max-height:calc(100% - 120px);overflow:hidden;pointer-events:none}
.xz-bubbles canvas{display:block;width:100%;height:100%;pointer-events:none}
.xz-hero-copy{z-index:2}
@media(prefers-reduced-motion:reduce){.xz-bubbles{display:none}}

/* Image batch processing page. */
.xz-image-tools-panel{display:grid;gap:24px}
.xz-image-tools-panel>*{min-width:0}
.xz-image-tools-panel>.xz-page-content{padding:0 4px;color:#607188}
.xz-tool-jumps{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;width:100%;min-width:0;box-sizing:border-box}
.xz-tool-jumps button{width:100%;padding:13px 16px;border:1px solid #d8e1eb;border-radius:8px;background:#f5f8fb;color:#3c567a;text-align:center;font:inherit;font-weight:700;cursor:pointer;transition:.18s ease}
.xz-tool-jumps button:hover{background:#e8eef5;border-color:#8195ab}
.xz-batch-tool{width:100%;min-width:0;box-sizing:border-box;scroll-margin-top:82px;padding:30px;border:1px solid #e1e7ee;border-radius:12px;background:#fff;box-shadow:0 8px 28px rgba(31,49,75,.06)}
.xz-batch-tool>header{display:flex;gap:16px;align-items:flex-start;margin-bottom:22px}.xz-batch-tool>header>div{min-width:0}
.xz-tool-number{display:inline-flex;flex:0 0 44px;height:44px;align-items:center;justify-content:center;border-radius:10px;background:#3c567a;color:#fff;font-weight:800}
.xz-batch-tool h2{margin:0 0 5px;color:#2d3f54;font-size:25px}
.xz-batch-tool header p,.xz-tool-note{margin:0;color:#718096;line-height:1.7}
.xz-batch-upload{display:block;padding:22px;border:2px dashed #c6d2df;border-radius:9px;background:#fafcfe;color:#34475d;font-weight:700;cursor:pointer}
.xz-batch-upload:hover{border-color:#7890aa;background:#f4f8fc}
.xz-batch-upload input{display:block;max-width:100%;margin-top:11px;font-weight:400}
.xz-file-drop-zone{transition:border-color .18s ease,background-color .18s ease,box-shadow .18s ease}
.xz-file-drop-zone.xz-file-drop-plain{display:block;box-sizing:border-box;margin-top:13px;padding:12px;border:1px dashed #c6d2df;border-radius:8px;background:#f8fafc;cursor:pointer}
.xz-file-drop-zone.is-file-dragover{border-color:#3c76b5!important;background:#edf6ff!important;box-shadow:0 0 0 4px rgba(60,118,181,.14)}
.xz-file-drop-hint{display:block;margin-top:8px;color:#718096;font-size:13px;font-weight:400;line-height:1.5}
.xz-tool-note{margin:10px 0 0;font-size:14px}
.xz-tool-settings{display:flex;flex-wrap:wrap;gap:16px 20px;align-items:end;margin-top:20px}
.xz-tool-settings label{display:flex;flex-direction:column;gap:7px;color:#52657b;font-size:14px;font-weight:700}
.xz-tool-settings input,.xz-tool-settings select{box-sizing:border-box;min-width:145px;height:42px;padding:8px 11px;border:1px solid #ccd6e1;border-radius:6px;background:#fff;color:#354254;font:inherit;font-weight:400}
.xz-tool-settings input:focus,.xz-tool-settings select:focus{outline:2px solid rgba(60,86,122,.18);border-color:#6f87a2}
.xz-advanced-toggle{align-self:flex-end;min-height:42px;padding:8px 15px;border:1px solid #d2dce7;border-radius:6px;background:#f3f6f9;color:#52657b;cursor:pointer;font:700 14px inherit}.xz-advanced-toggle:hover{background:#e7edf4;color:#304967}.xz-advanced-toggle span{display:inline-block;margin-left:5px;font-size:12px;transition:transform .2s}.xz-advanced-toggle[aria-expanded="true"] span{transform:rotate(180deg)}
.xz-advanced-settings{margin-top:16px}.xz-advanced-settings summary{display:inline-flex;align-items:center;gap:8px;min-height:40px;box-sizing:border-box;padding:9px 16px;border:1px solid #d2dce7;border-radius:6px;background:#f3f6f9;color:#52657b;cursor:pointer;font-size:14px;font-weight:700;list-style:none}.xz-advanced-settings summary::-webkit-details-marker{display:none}.xz-advanced-settings summary:after{content:'▾';font-size:12px;transition:transform .2s}.xz-advanced-settings[open] summary:after{transform:rotate(180deg)}.xz-advanced-settings summary:hover{background:#e7edf4;color:#304967}.xz-advanced-settings:not([open])>.xz-advanced-fields{display:none}.xz-advanced-fields{display:flex;flex-wrap:wrap;align-items:center;gap:16px 24px;margin-top:14px;padding:16px;border:1px solid #e1e7ee;border-radius:8px;background:#f8fafc}.xz-advanced-fields label{display:flex;gap:10px;align-items:center;color:#52657b;font-size:14px;font-weight:700;white-space:nowrap}.xz-advanced-fields input[type=number]{box-sizing:border-box;width:205px;height:42px;padding:8px 11px;border:1px solid #ccd6e1;border-radius:6px;background:#fff;color:#354254;font:inherit;font-weight:400}.xz-advanced-fields input[type=number]:focus{outline:2px solid rgba(60,86,122,.18);border-color:#6f87a2}.xz-advanced-fields .xz-ratio-toggle input{width:18px;height:18px;accent-color:#3c567a}
.xz-convert-advanced-fields[hidden]{display:none}.xz-convert-advanced-fields{margin-top:14px}.xz-convert-quality{display:grid!important;grid-template-columns:auto auto;gap:4px 10px!important;min-width:250px}.xz-convert-quality output{color:#60758e;font-weight:500}.xz-convert-quality input[type=range]{grid-column:1/-1;width:100%;height:auto;accent-color:#3c76b5}.xz-convert-quality-note{flex-basis:100%;margin-top:-7px;color:#7a899b;font-size:12px}
.xz-size-converter{display:flex;flex-wrap:wrap;align-items:center;gap:9px;margin-top:16px;padding:12px 15px;border-radius:7px;background:#f4f7fa;color:#52657b}
.xz-size-converter label{display:flex;align-items:center;gap:7px}.xz-size-converter input{box-sizing:border-box;width:92px;height:38px;padding:7px 9px;border:1px solid #ccd6e1;border-radius:6px;color:#354254}.xz-size-converter output{font-weight:800;color:#3c567a}.xz-size-converter small{color:#718096}
.xz-tool-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:22px}
.xz-tool-actions button,.xz-tool-download{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:9px 16px;border:0;border-radius:6px;background:#3c567a;color:#fff;cursor:pointer;font-weight:700;text-decoration:none}
.xz-tool-actions button:hover,.xz-tool-download:hover{background:#304967;color:#fff}
.xz-navigation-panel .xz-tool-download,.xz-navigation-panel .xz-tool-download:visited,.xz-navigation-panel .xz-download,.xz-navigation-panel .xz-download:visited{color:#fff!important}
.xz-tool-actions .xz-secondary{border:1px solid #d2dce7;background:#f3f6f9;color:#52657b}
.xz-tool-actions .xz-secondary:hover{background:#e7edf4;color:#304967}
.xz-tool-actions button:disabled{opacity:.45;cursor:default}
.xz-tool-status{min-height:27px;margin:16px 0 0;color:#607188;line-height:1.7}
.xz-tool-result{display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:14px;align-items:center;padding:14px 0;border-top:1px solid #e7ecf2}
.xz-tool-thumb{width:56px;height:56px;border-radius:7px;background:#edf2f7;object-fit:cover}
.xz-tool-result-text{min-width:0;overflow-wrap:anywhere;color:#52657b;line-height:1.6}
.xz-tool-result-text strong{display:block;color:#2f4156}
.xz-tool-result.is-error{grid-template-columns:minmax(0,1fr);color:#b54848}
html[data-theme="dark"] .xz-tool-jumps button{background:#223044;border-color:#405067;color:#dbe5f1}
html[data-theme="dark"] .xz-tool-jumps button:hover{background:#2d425a}
html[data-theme="dark"] .xz-batch-tool{background:#182331;border-color:#334255;box-shadow:none}
html[data-theme="dark"] .xz-batch-tool h2,html[data-theme="dark"] .xz-batch-upload{color:#e5edf6}
html[data-theme="dark"] .xz-batch-tool header p,html[data-theme="dark"] .xz-tool-note,html[data-theme="dark"] .xz-tool-status,html[data-theme="dark"] .xz-tool-result-text{color:#aebcd0}
html[data-theme="dark"] .xz-batch-upload{background:#111b27;border-color:#52667d}
html[data-theme="dark"] .xz-file-drop-zone.xz-file-drop-plain{background:#111b27;border-color:#52667d}
html[data-theme="dark"] .xz-file-drop-zone.is-file-dragover{border-color:#78a9df!important;background:#172b40!important;box-shadow:0 0 0 4px rgba(120,169,223,.14)}
html[data-theme="dark"] .xz-file-drop-hint{color:#aebcd0}
html[data-theme="dark"] .xz-tool-settings label{color:#c6d2df}
html[data-theme="dark"] .xz-tool-settings input,html[data-theme="dark"] .xz-tool-settings select{background:#111b27;border-color:#405067;color:#dbe5f1}
html[data-theme="dark"] .xz-advanced-toggle{background:#26384d;border-color:#405067;color:#dbe5f1}html[data-theme="dark"] .xz-advanced-toggle:hover{background:#30455d}
html[data-theme="dark"] .xz-size-converter{background:#111b27;color:#c6d2df}html[data-theme="dark"] .xz-size-converter input{background:#182331;border-color:#405067;color:#dbe5f1}html[data-theme="dark"] .xz-size-converter output{color:#b9cee5}html[data-theme="dark"] .xz-size-converter small{color:#91a1b4}
html[data-theme="dark"] .xz-advanced-settings summary{background:#26384d;border-color:#405067;color:#dbe5f1}html[data-theme="dark"] .xz-advanced-settings summary:hover{background:#30455d}html[data-theme="dark"] .xz-advanced-fields{background:#111b27;border-color:#334255}html[data-theme="dark"] .xz-advanced-fields label{color:#c6d2df}html[data-theme="dark"] .xz-advanced-fields input[type=number]{background:#182331;border-color:#405067;color:#dbe5f1}html[data-theme="dark"] .xz-convert-quality output,html[data-theme="dark"] .xz-convert-quality-note{color:#aebcd0}
html[data-theme="dark"] .xz-tool-result{border-color:#334255}
html[data-theme="dark"] .xz-tool-result-text strong{color:#e5edf6}
html[data-theme="dark"] .xz-tool-actions .xz-secondary{background:#26384d;border-color:#405067;color:#dbe5f1}
@media(max-width:700px){
 .xz-image-tools-panel{gap:16px}.xz-tool-jumps{grid-template-columns:1fr}.xz-batch-tool{padding:21px 17px}.xz-batch-tool>header{gap:12px}.xz-tool-number{flex-basis:38px;height:38px}.xz-batch-tool h2{font-size:21px}.xz-tool-settings{display:grid;grid-template-columns:1fr 1fr}.xz-tool-settings label{min-width:0}.xz-tool-settings input,.xz-tool-settings select{width:100%;min-width:0}.xz-advanced-fields{display:grid;grid-template-columns:1fr}.xz-advanced-fields label{flex-direction:column;align-items:stretch;gap:7px;white-space:normal}.xz-advanced-fields input[type=number]{min-width:0;width:100%}.xz-advanced-fields .xz-ratio-toggle{flex-direction:row;align-items:center}.xz-tool-result{grid-template-columns:48px minmax(0,1fr)}.xz-tool-thumb{width:48px;height:48px}.xz-tool-download{grid-column:1/-1;width:100%;box-sizing:border-box}
}
@media(max-width:430px){.xz-tool-settings{grid-template-columns:1fr}}

/* Reader controls and mobile page-reading layout. */
.xz-reader[open]{display:flex;flex-direction:column}.xz-reader>header,.xz-reader>footer{flex:0 0 auto}.xz-reader>header strong{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.xz-reader-controls{display:flex;flex:0 0 auto;align-items:center;justify-content:space-between;gap:12px;padding:10px 18px;background:#ebe4d3}.xz-reader-tools,.xz-reader-controls nav{display:flex;flex-wrap:wrap;align-items:center;gap:9px}.xz-reader-controls nav label{display:flex;align-items:center;gap:7px}.xz-reader-menu{display:none}.xz-reader-stage{flex:1 1 auto;height:auto;min-height:0}.xz-reader.is-dark .xz-reader-controls{background:#101720}.xz-reader.is-dark .xz-reader-controls button,.xz-reader.is-dark .xz-reader-controls select{background:#263142;color:#e8edf4;border-color:#536174}
@media(max-width:1024px){
 .xz-book-card h2{font-size:17px;height:1.45em;line-height:1.45;margin-bottom:16px;white-space:nowrap;text-overflow:ellipsis}.xz-book-card h2 a{display:block;-webkit-line-clamp:unset;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
 .xz-reader{inset:0;width:100vw;max-width:none;height:100vh;height:100dvh;max-height:none;margin:0;border-radius:0;background:#f5eedc;box-shadow:none}.xz-reader::backdrop{background:#15202d}
 .xz-reader>header{min-height:50px;box-sizing:border-box;align-items:center;padding:calc(5px + env(safe-area-inset-top)) 12px 5px;background:rgba(245,238,220,.97);box-shadow:0 1px 8px #5c51311a;z-index:5}.xz-reader>header strong{max-width:42vw;font-size:14px;font-weight:600}.xz-reader-menu{display:inline-flex;align-items:center;white-space:nowrap}
 .xz-reader-header-actions{gap:5px}.xz-reader-header-actions button{min-height:0;padding:4px 7px;font-size:12px;font-weight:400;line-height:1.25;border-color:#c9c1af;border-radius:4px;box-shadow:none;touch-action:manipulation;-webkit-appearance:none;appearance:none;-webkit-user-select:none;user-select:none}.xz-reader-header-actions button:focus,.xz-reader-header-actions button:focus-visible{outline:0;box-shadow:none;border-color:#c9c1af}
 .xz-reader-controls{display:none;position:absolute;top:calc(50px + env(safe-area-inset-top));left:12px;right:12px;z-index:12;box-sizing:border-box;max-height:calc(100dvh - 82px);overflow:auto;padding:14px;border:1px solid #d8ceb8;border-radius:12px;background:rgba(245,238,220,.98);box-shadow:0 14px 40px #0005;touch-action:manipulation;-ms-touch-action:manipulation}.xz-reader-controls button,.xz-reader-controls select,.xz-reader-controls label{touch-action:manipulation;-ms-touch-action:manipulation}.xz-reader.is-menu-open .xz-reader-controls{display:block}
 .xz-reader-tools{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:9px}.xz-reader-tools button{width:100%;min-width:0;padding-right:6px;padding-left:6px}.xz-reader-language{grid-column:1/3;grid-row:1;min-width:0;gap:5px;font-size:13px}.xz-reader-language select{min-width:0;width:100%;padding-right:4px;padding-left:6px}.xz-reader-tools #xz-theme{grid-column:3/5;grid-row:1}.xz-reader-tools #xz-reader-menu-close{grid-column:5/7;grid-row:1}.xz-reader-tools #xz-speak{grid-column:1/4;grid-row:2}.xz-reader-tools #xz-auto{grid-column:4/7;grid-row:2}.xz-reader-controls nav{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:10px}.xz-reader-controls nav label{grid-column:1/-1;display:grid;grid-template-columns:auto minmax(0,1fr)}.xz-reader-controls nav select{min-width:0;width:100%}.xz-reader-controls nav button{width:100%}
 .xz-reader-stage{position:relative;z-index:2;height:auto;padding:24px 7vw 18px;overflow:hidden;touch-action:pan-y;overscroll-behavior:none;-webkit-user-select:none;user-select:none;background:#f5eedc;will-change:transform;transform:translate3d(0,0,0)}.xz-reader.is-page-dragging .xz-reader-stage{box-shadow:var(--xz-page-edge-shadow);border-radius:1px}.xz-reader-stage #xz-txt-view{box-sizing:border-box;width:100%;max-width:none;height:100%;overflow:hidden;margin:0;white-space:pre-wrap;font-size:20px;line-height:2.05;text-align:justify}.xz-reader-stage #xz-epub-view{height:100%;overflow:hidden;touch-action:pan-y;background:#f5eedc}.xz-reader-stage #xz-epub-view iframe{display:block;touch-action:pan-y;background:#f5eedc}.xz-reader-stage canvas{max-width:100%;max-height:100%;object-fit:contain;box-shadow:none}
 .xz-reader-page-preview{display:none;position:absolute;z-index:1;top:calc(50px + env(safe-area-inset-top));right:0;bottom:36px;left:0;box-sizing:border-box;padding:24px 7vw 18px;overflow:hidden;background:#f5eedc}.xz-reader-page-preview.is-active{display:block}.xz-reader-page-preview iframe{display:block;width:100%;height:100%;border:0;background:#f5eedc}.xz-reader-page-preview:after{content:'';position:absolute;right:7vw;bottom:18px;left:7vw;height:var(--xz-preview-guard,0px);background:#f5eedc;pointer-events:none}.xz-reader-preview-text{box-sizing:border-box;width:100%;height:100%;overflow:hidden;white-space:pre-wrap;line-height:1.9;text-align:justify}.xz-reader-page-preview canvas{display:block;max-width:100%;max-height:100%;margin:auto;object-fit:contain}
 .xz-reader>footer{min-height:36px;box-sizing:border-box;justify-content:center;padding:7px 16px calc(7px + env(safe-area-inset-bottom));font-size:12px;background:#f5eedc;color:#7a705c;z-index:4}.xz-reader.is-dark>header{background:rgba(16,23,32,.97)}.xz-reader.is-dark .xz-reader-controls{background:rgba(24,33,45,.98);border-color:#536174}.xz-reader.is-dark .xz-reader-stage,.xz-reader.is-dark .xz-reader-stage #xz-epub-view,.xz-reader.is-dark .xz-reader-stage #xz-epub-view iframe,.xz-reader.is-dark .xz-reader-page-preview,.xz-reader.is-dark .xz-reader-page-preview iframe,.xz-reader.is-dark .xz-reader-page-preview:after{background:#18212d}.xz-reader.is-dark>footer{background:#18212d;color:#aeb7c3}
}

html.xz-reader-open,body.xz-reader-open{overflow:hidden!important;overscroll-behavior:none}
.xz-reader-font{display:flex;align-items:center;gap:8px}.xz-reader-font output{min-width:42px;text-align:center;font-variant-numeric:tabular-nums}
.xz-reader-header-actions{display:flex;align-items:center;gap:8px;flex-wrap:nowrap!important}#xz-reader-close-mobile{display:inline-flex;align-items:center;white-space:nowrap}.xz-reader-language{display:flex;align-items:center;gap:7px;white-space:nowrap}
@media(max-width:1024px){
 .xz-reader[open]{position:fixed!important;inset:0!important;width:100vw!important;height:100vh!important;height:100dvh!important;overflow:hidden!important}
 .xz-reader-stage,.xz-reader-gesture{touch-action:none!important;overscroll-behavior:none}
 .xz-reader-stage #xz-txt-view{font-size:24px;line-height:1.9}
 .xz-reader-close-desktop{display:none!important}.xz-reader-stage #xz-epub-view{position:relative}.xz-reader-stage #xz-epub-view:after{content:'';position:absolute;z-index:2;left:0;right:0;bottom:0;height:var(--xz-page-guard,60px);pointer-events:none;background:#f5eedc}.xz-reader.is-dark .xz-reader-stage #xz-epub-view:after{background:#18212d}
 .xz-desktop-pagination{display:none!important}.xz-reader-controls nav{grid-template-columns:1fr}.xz-reader-controls nav label{grid-column:auto;align-items:center}.xz-reader-controls nav label>select{min-height:44px;padding:9px 34px 9px 10px;font-size:16px;line-height:1.35;touch-action:manipulation}.xz-reader-font{display:grid;grid-template-columns:1fr auto 48px auto;width:100%;box-sizing:border-box}.xz-reader-font button{width:auto!important;min-width:48px}.xz-reader-font output{font-weight:700}
}
@media(min-width:1025px){
 .xz-reader[open]{display:block;position:fixed;inset:0;width:100vw;max-width:none;height:100vh;height:100dvh;max-height:none;margin:0;overflow-x:hidden;overflow-y:auto;border-radius:0;background:#f5eedc;box-shadow:none}.xz-reader::backdrop{background:#f5eedc}.xz-reader>header{min-height:58px;box-sizing:border-box;padding:16px max(28px,calc((100vw - 1000px)/2));background:#eee6d5;border-bottom:1px solid #ded4bd}.xz-reader>header strong{font-size:18px}.xz-reader-header-actions{position:fixed;top:84px;right:28px;left:auto;z-index:15;display:flex!important;flex-direction:column;gap:10px!important}.xz-reader-header-actions button{width:88px;min-height:48px;padding:8px 7px;border-color:#d8ceb8;background:rgba(247,243,232,.98);box-shadow:0 5px 18px #00000018;font-size:14px;cursor:pointer}.xz-reader-menu{display:inline-flex;align-items:center;justify-content:center}
 .xz-reader-controls{display:none;position:fixed;top:84px;right:130px;z-index:12;width:min(620px,calc(100% - 180px));box-sizing:border-box;flex-direction:column;align-items:stretch;padding:16px;border:1px solid #d8ceb8;border-radius:10px;background:#f7f3e8;box-shadow:0 14px 40px #0004}.xz-reader.is-menu-open .xz-reader-controls{display:flex}.xz-reader-controls nav{display:flex;flex-direction:column;align-items:stretch}.xz-reader-controls nav label{display:grid;grid-template-columns:auto minmax(0,1fr)}.xz-reader-font{justify-content:flex-start}
 .xz-reader-stage{height:auto;min-height:calc(100dvh - 58px);overflow:visible;padding:24px 0 42px;background:#f5eedc}.xz-reader-stage #xz-epub-view{width:min(1000px,calc(100vw - 280px));height:auto;margin:0 auto}.xz-reader-stage #xz-txt-view{width:min(820px,calc(100vw - 280px));max-width:none;margin:0 auto}.xz-reader-stage canvas{margin:auto}.xz-desktop-pagination{display:grid;grid-template-columns:repeat(3,1fr);width:min(900px,calc(100vw - 320px));height:62px;margin:0 auto 22px;overflow:hidden;border:1px solid #ded5c1;border-radius:32px;background:rgba(232,225,208,.72)}.xz-desktop-pagination button{border:0;border-right:1px solid #d8cfbd;border-radius:0;background:transparent;font-size:17px;font-weight:500;cursor:pointer}.xz-desktop-pagination button:last-child{border-right:0}.xz-desktop-pagination button:hover{background:rgba(255,255,255,.5)}.xz-reader>footer{min-height:42px;background:#eee6d5}.xz-reader[open].is-dark,.xz-reader.is-dark .xz-reader-stage{background:#18212d}.xz-reader.is-dark::backdrop{background:#18212d}.xz-reader.is-dark .xz-desktop-pagination{border-color:#3f4b5b;background:#101720}.xz-reader.is-dark .xz-desktop-pagination button{border-right-color:#3f4b5b;background:transparent;color:#e8edf4}.xz-reader.is-dark .xz-reader-header-actions button{background:#18212d;color:#e8edf4;border-color:#536174}
}
/* Keep mobile navigation legible on its blue panel on every page. */
@media(max-width:700px){
body .xz-header .xz-brand,body .xz-header .xz-menu,
body .xz-header .xz-nav .xz-nav-items>li>a,
body .xz-header .xz-nav .xz-search-open,
body:not(.xz-home):not(.xz-navigation) .xz-header .xz-brand,
body:not(.xz-home):not(.xz-navigation) .xz-header .xz-menu,
body:not(.xz-home):not(.xz-navigation) .xz-header .xz-nav-items>li>a,
body:not(.xz-home):not(.xz-navigation) .xz-header .xz-search-open{color:#fff!important}
}

/* Centered mobile glass navigation. */
@media(max-width:700px){
 .xz-header.is-menu-open{background:rgba(27,43,65,.62)!important;-webkit-backdrop-filter:none!important;backdrop-filter:none!important}
 .xz-header .xz-menu{position:relative;z-index:2;display:flex;width:44px;height:44px;align-items:center;justify-content:center;padding:0;font-size:38px;font-weight:300;line-height:1}
 .xz-header .xz-nav{
  position:fixed;inset:56px 0 auto;box-sizing:border-box;width:100%;height:auto;max-height:calc(100dvh - 56px);
  align-items:center;overflow-y:auto;padding:26px 20px 28px;
  background:rgba(28,46,70,.52);border-top:1px solid rgba(255,255,255,.12);
  -webkit-backdrop-filter:blur(10px) saturate(115%);backdrop-filter:blur(10px) saturate(115%);
  box-shadow:inset 0 1px rgba(255,255,255,.05)
 }
 .xz-header .xz-nav-items{display:flex;width:min(100%,520px);flex-direction:column;align-items:stretch;gap:8px;text-align:center}
 .xz-header .xz-nav-items>li{width:100%}
 .xz-header .xz-nav-items>li>a{position:relative;display:flex;width:100%;align-items:center;justify-content:center;min-height:52px;box-sizing:border-box;padding:10px 16px;font-size:18px;text-align:center}
 .xz-header .xz-nav-items>.subcate>a:after{content:'▾';position:absolute;left:calc(50% + 29px);margin:0;font-size:22px;line-height:1;transform-origin:center;vertical-align:middle}
 .xz-header .xz-nav-items>.subcate.is-submenu-open>a:after{transform:rotate(180deg)}
 .xz-header .xz-nav-items .subnav,.xz-header .xz-nav-items li>ul{
  box-sizing:border-box;width:min(100%,460px);margin:4px auto 10px;padding:12px 10px;
  background:rgba(12,21,34,.42);border:1px solid rgba(255,255,255,.1);border-radius:6px;
  box-shadow:0 10px 28px rgba(7,14,24,.16);text-align:center
 }
 .xz-header .xz-nav-items .subnav a,.xz-header .xz-nav-items li>ul a{display:block;padding:11px 14px;font-size:17px;text-align:center}
 .xz-header .xz-nav .xz-theme-toggle,.xz-header .xz-nav .xz-search-open{align-self:center!important;margin:4px 0!important}
 .xz-header .xz-nav .xz-search-open{order:2;padding:11px 18px!important}
 .xz-header .xz-nav .xz-theme-toggle{order:3;padding:0!important}
}

/* Compact single-line book titles keep the action close to each cover. */
.xz-book-card h2{height:1.45em;margin:12px 0 8px;line-height:1.45;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.xz-book-card h2 a{display:block;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;-webkit-line-clamp:unset}

/* Crisper desktop book actions. */
@media(min-width:601px){
 .xz-book-card .xz-book-detail-link{font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:16px;font-weight:500;line-height:1.35;letter-spacing:.02em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
}
/* Book search results use a compact portrait column without a landscape frame. */
.xz-blog-panel .xz-search-book-item{grid-template-columns:190px minmax(0,1fr);gap:28px;align-items:center}
.xz-search-book-item .xz-list-image{display:flex;align-items:center;justify-content:center}
.xz-search-book-item .xz-list-image img{width:auto;height:220px;max-width:180px;object-fit:contain;background:transparent}
@media(max-width:600px){.xz-blog-panel .xz-search-book-item{grid-template-columns:1fr}.xz-search-book-item .xz-list-image img{height:260px;max-width:210px}}

/* Keep the standalone 404 page readable in night mode. */
html[data-theme="dark"] .errorpage{background:#182331;box-shadow:0 1px 5px rgba(0,0,0,.28)}
html[data-theme="dark"] .errorpage h3,html[data-theme="dark"] .errorpage h4{color:#eef4fb;text-shadow:none}
html[data-theme="dark"] .errorpage p{color:#b7c5d6}

/* Let long tool-page titles use two or more lines on narrow screens. */
@media(max-width:700px){
 body.xz-navigation{overflow-x:hidden}
 body.xz-navigation>.wrapper{width:100%;max-width:100%;min-width:0}
 body.xz-navigation .xz-navigation-hero{width:100%;max-width:100%;min-width:0;height:auto;min-height:250px;padding:78px 18px 52px}
 body.xz-navigation .xz-navigation-hero>div{box-sizing:border-box;width:100%;max-width:100%;min-width:0;transform:none}
 body.xz-navigation .xz-navigation-hero h1{max-width:100%;margin:6px auto 8px;font-size:clamp(24px,7vw,29px);line-height:1.42;white-space:normal;overflow-wrap:anywhere;text-wrap:balance}
}

/* Separate parent-page navigation from submenu toggling on touch devices. */
.xz-submenu-toggle{display:none}
@media(max-width:700px){
 .xz-header .xz-nav-items>.subcate>a:after{content:none;display:none}
 .xz-header .xz-nav-items>.subcate>.xz-submenu-toggle{position:absolute;z-index:2;top:4px;left:calc(50% + 25px);display:grid;width:44px;height:44px;place-items:center;margin:0;padding:0;border:0;border-radius:8px;background:transparent;color:#fff;font-size:22px;line-height:1;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
 .xz-header .xz-nav-items>.subcate>.xz-submenu-toggle span{display:block;transition:transform .18s ease}
 .xz-header .xz-nav-items>.subcate.is-submenu-open>.xz-submenu-toggle span{transform:rotate(180deg)}
}
@media(hover:none) and (pointer:coarse) and (min-width:701px){
 .xz-header .xz-nav-items>.subcate>a:after{content:none;display:none}
 .xz-header .xz-nav-items>.subcate>.xz-submenu-toggle{position:absolute;z-index:2;top:50%;right:-27px;display:grid;width:32px;height:44px;place-items:center;margin:0;padding:0;border:0;background:transparent;color:inherit;font-size:17px;line-height:1;transform:translateY(-50%);touch-action:manipulation;-webkit-tap-highlight-color:transparent}
 .xz-header .xz-nav-items>.subcate>.xz-submenu-toggle span{display:block;transition:transform .18s ease}
 .xz-header .xz-nav-items>.subcate.is-submenu-open>.xz-submenu-toggle span{transform:rotate(180deg)}
 .xz-nav .xz-nav-items li:not(.is-submenu-open)>.subnav,.xz-nav .xz-nav-items li:not(.is-submenu-open)>ul{display:none}
 .xz-nav .xz-nav-items li.is-submenu-open>.subnav,.xz-nav .xz-nav-items li.is-submenu-open>ul{display:block}
}
html[data-theme="dark"] .errorpage .errschtxt,html[data-theme="dark"] .errorpage .errschbtn{background:#101a26;border-color:#40536a;color:#e6eef7}
html[data-theme="dark"] .errorpage .errschtxt:focus{background:#101a26;border-color:#7192b7;color:#fff;box-shadow:0 0 0 .2rem rgba(92,136,184,.18)}
html[data-theme="dark"] .errorpage .goback{background:#223247;border-color:#40536a;color:#dce7f3}
html[data-theme="dark"] .errorpage .goback:after{color:#a9bed4}