/* TechSchool base layout · techschool.top
   自托管版式骨架：只含布局/尺寸/定位，不含 runoob 的配色、字体与字重。
   由 runoob 主题 CSS 机械剥离视觉声明生成（build_base.py），供 13,862 页镜像复用。
   视觉层由 techschool-skin.css 全权接管。 */
/* ========================= CSS 自定义属性 ========================= */ /* ========================= Reset ========================= */ a,abbr,address,blockquote,body,caption,cite,code,dd,del,dfn,div,dl,dt,em,fieldset,form,h1,h2,h3,h4,h5,h6,html,iframe,img,ins,label,legend,li,object,ol,p,pre,q,small,span,strong,sub,sup,table,tbody,td,tfoot,th,thead,tr,ul{margin:0;padding:0}article,aside,figcaption,figure,figure img,footer,header,hgroup,nav,object,section,video{display:block}figure{position:relative}figure img{width:100%}/* ========================= HTML & Body ========================= */ html{font-size:62.5%}body{margin:0;font-size:1.2em;-webkit-font-smoothing:antialiased}/* ========================= Typography ========================= */ h1,h2,h3,h4{font-size:14px}h1{margin:0 0 10px;font-size:2.1em;text-indent:-9999px}hr{height:1px;clear:both}li,ol,p,ul{line-height:1.5em}blockquote{border:1px solid;padding:12px;margin:8px 0;font-size:1.04em}pre{position:relative;margin:15px auto;border:1px solid;border-left-width:4px;padding:10px 15px;overflow:auto;word-break:break-word !important;word-wrap:normal !important;white-space:pre-wrap !important}#moon,#sun,#moon-mobile,#sun-mobile{cursor:pointer;padding:4px;font-size:18px;line-height:0.8}/* ========================= Grid ========================= */ .row{width:100%;max-width:1280px;margin:0 auto;overflow:hidden}.col,.eightcol,.elevencol,.fifteencol,.fivecol,.fourcol,.fourteencol,.ninecol,.onecol,.sevencol,.sixcol,.tencol,.thirteencol,.threecol,.twelvecol,.twocol{margin-right:1%;float:left}.onecol{width:4%}.twocol{width:10.4%}.threecol{width:16.8%}.fourcol,.runoob-col-md2{margin-right:1%;float:left;width:16%;display:block;box-sizing:border-box;border:1px solid}.copyright,.fivecol{width:14%;box-sizing:border-box;float:left}.listcol{width:27.6%;float:left}.mediatemple{width:29.6%}.footer-nav,.search,.sixcol{width:36%}.eightcol{width:48.8%}.ninecol{width:55.2%}.logo,.tencol{width:61.6%}.elevencol,.middle-column{width:68%;box-sizing:border-box;float:left}.twelvecol{width:74.4%;float:left}.thirteencol{width:80.8%}.fourteencol{width:87.2%}.fifteencol{width:93.6%}.nav,.nav-sub,.profile-bar,.row-login-desktop,.row-login-mobile,.sixteencol{width:100%;float:left}.last{margin-right:0}embed,img,object{max-width:100%}img{height:auto}/* ========================= Buttons（统一基础样式） ========================= */ .btn{display:inline-block;padding:6px 12px;margin-bottom:0;font-size:14px;line-height:1.428571429;text-align:center;white-space:nowrap;vertical-align:middle;cursor:pointer;border:1px solid;user-select:none}/* 公共绿色按钮基础 */ .button-green,.button-brown,#ds-form input.button-green,#ds-form input.button-brown,input[type=submit]{padding:7px 10px;-webkit-appearance:none;margin:10px 0 0}.button-green,#ds-form input.button-green{width:150px;border:1px solid}.button-brown,#ds-form input.button-brown{width:150px;border:1px solid}input[type=submit]{width:80px;border:1px solid;cursor:pointer}.example-btn{border-color:}.example-btn:hover{border-color:}a.showbtn,a.showbtn:link,a.showbtn:visited,a.tryitbtn,a.tryitbtn:link,a.tryitbtn:visited{display:inline-block;font-size:14px;text-align:center;padding:4px 10px;margin-left:5px;margin-bottom:5px;white-space:nowrap}a.playitbtn,a.playitbtn:link,a.playitbtn:visited{display:inline-block;border:1px solid;font-size:11px;text-align:center;padding:1px 10px 2px;margin-left:1px;white-space:nowrap}a.tryitbtnsyntax:active,a.tryitbtnsyntax:hover,a.tryitbtnsyntax:link,a.tryitbtnsyntax:visited{float:right;padding-top:0;padding-bottom:2px;border:1px solid}.collection-saved,.collection-saved:hover{border:1px solid}.dashang{display:block;width:100px;margin:5px auto;height:25px;line-height:25px;padding:10px;text-align:center;font-size:16px}.dashang:hover{padding:15px;font-size:18px}.card-button{display:inline-block;padding:8px 16px;margin-top:16px}/* ========================= Forms ========================= */ button,input,select,textarea{-webkit-font-smoothing:antialiased;font-size:14px}button,input,select,td,textarea,th{font-size:14px}button:hover{cursor:pointer}input[type=radio]{-webkit-appearance:radio}.socialicons input[type=submit]{width:18%;line-height:16px;margin:auto;float:right}/* ========================= Layout ========================= */ .site-fix{position:fixed;top:0;bottom:0;z-index:666;min-height:0;overflow:hidden;border-color;overflow-y:visible;-webkit-overflow-scrolling:touch;overflow-x:hidden}.site-fix-bottom{bottom:325px}.container{padding-left:10px;padding-right:10px}.main{margin-top:20px}.middle-column-home{width:78%;margin-right:0;padding:12px 20px;border:1px solid}.big-middle-column{font-size:14px}/* ========================= Logo & Search ========================= */ .logo h1{background-repeat:no-repeat;text-indent:-9999px;width:258px;height:39px;margin-top:10px;margin-left:20px;display:block}.logo a{width:258px;height:39px;display:block}.logo img{padding:10px 0 0 20px}.logo-search{margin-top:17px;margin-bottom:15px}.row-logo{margin-top:10px;margin-bottom:10px}.mobile-nav{display:none}.search-reveal{display:none}.row-search-mobile{display:none}.search{text-align:right}.search form{padding:5px;margin:5px 0 0;text-align:center}.search input{line-height:34px;height:35px;width:94%;padding:0 3%;border:1px solid;font-size:1.2em}.sub-navigation{margin-bottom:20px}.sub-navigation-mobile{display:none}.nav,.nav-sub,.profile-bar{padding:4px 0;height:auto;font-size:14px}.nav ul,.nav-sub ul{list-style:none;margin:0;padding:0;white-space:nowrap}.nav li,.nav-sub li{display:inline-block;margin-right:18px}.nav li a,.nav-sub li a{position:relative;display:inline-block;padding:6px 2px}.nav .current > a::after{position:absolute;left:10px;right:10px;bottom:-6px;height:2px}.nav-sub .current-cat a{padding:6px 10px}.profile-bar{text-align:right;margin:0;padding:0}.profile-nav{z-index:10000;position:relative;list-style:none;float:right;width:100%}.profile-nav li{float:right;position:relative}.profile-nav a{display:block}.welcome{margin:12px 10px 0 0}.mobile-nav-hidden{display:none;padding:10px 0 0;border-right:1px solid;border-left:1px solid}.nav-sub-mobile{font-size:1.1em;padding:0}.nav-sub-mobile ul{list-style:none}.nav-sub-mobile li a{padding:5px 0 5px 20px;display:block}/* ========================= Sidebar ========================= */ .tab{display:block;padding:8px 4px;font-size:15px;line-height:1.6;border:1px solid;position:relative}.tab::after{position:absolute;left:12px;right:12px;bottom:0;height:1px}.sidebar-box{margin:0 0 20px;padding:4px}.sidebar-box.cate-list{padding:0}.sidebar-box .cate-items{overflow:hidden;padding-left:14px;text-align:center;padding-bottom:16px}.sidebar-box .cate-items a{float:left;width:31.3333%;margin:0 1% 1% 0;padding:0;font-size:12px;height:29px;line-height:29px;overflow:hidden}.sidebar-box.about-author .article-body{padding:0}.sidebar-box table{width:100%;margin-top:10px}.sidebar-box td,.sidebar-box td.key{padding:5px 20px 5px 0;vertical-align:middle;font-size:1em}.sidebar-box tr{border-bottom:1px solid;display:block}.sidebar-box table td:nth-child(odd){width:30px}.sidebar-box td.step{width:40px !important}.sidebar-box ul{margin:0;padding:0}.sidebar-box ul li{margin:0 0 1em 1em;background-repeat:no-repeat;background-position:left top 6px;position:relative;padding-left:1.5em;line-height:1.6}.sidebar-box.sidebar-cate{padding:0;margin:0}/* ========================= Design / Gallery list ========================= */ .design a{display:block;border-bottom:1px solid;line-height:1.6;padding:8px 10px;font-size:13px}.design a:hover{transform:translateY(-1px)}.design{padding:4px;margin:0;overflow:hidden}.design img{margin:0 0 5px}.design:nth-child(even){border-top:1px solid;border-bottom:1px solid}.design .author{margin:2px 0 0}.gallery-list{padding:0}/* ========================= Article ========================= */ .article{margin:0;border:1px solid;margin-bottom:20px}.article-heading{border-bottom:1px solid;padding:20px 30px}.article-heading-ad{max-height:98px;text-align:center;padding:4px}.archive-options{border:1px solid;padding:20px;overflow:hidden}.archive-options h2,.article-heading h2{font-size:2.6em;margin:0 0 .3em}.article-body{padding:10px 10px 20px}.article-body h2{font-size:1.8em;margin:2px 0;line-height:1.8em}.article-body h3{font-size:1.4em;margin:8px 0}.article-body h3.heading{margin-top:0}.article-body h3.membership{font-size:1.6em;margin:0 0 20px}.article-body h1{text-indent:initial}.article-body p{word-break:break-word;overflow-wrap:break-word;line-height:1.9;font-size:14px}.article-body a{font-size:14px}.article-body ul,.article-body ol{margin:0;padding:0}.article-body ul,.article-body ol{margin-top:1em;margin-bottom:1em}.article-body ul li,.article-body ol li{font-size:14px;word-break:break-all}.article-body ul li p{line-height:2em}.article-body ul li{margin:0 0 1em 1em;background-repeat:no-repeat;background-position:left top 6px;position:relative;padding-left:1.5em;line-height:1.6}.article-body ol li{margin:0 0 1em 2.5em;padding:0}.article-body .quote,.article-body blockquote p{word-wrap:break-word;padding:4px;font-size:14px;line-height:1.5em}.article-body .blockquote-full{padding:20px;margin:0 0 1.5em;font-size:1.5em;line-height:1.5em}.article-body .pullquote-l{padding:20px;margin:0 1.5em 1em 0;font-size:1.5em;line-height:1.5em;float:left;width:30%}.article-body .pullquote-r{padding:20px;margin:1.5em 0 1.5em 1.5em;font-size:1.5em;line-height:1.5em;float:right;width:30%}.article-body .wp-caption{width:100% !important}.article-body .caption,.article-body .wp-caption-text{padding:20px;margin:0 0 1.5em;border-bottom:1px solid;font-size:1.2em !important;line-height:1.5em}.article-body .size-full{max-width:100%}.article-body .two-column{column-count:2;column-gap:2em;margin:0 0 1.5em}.article-body .caption-right{display:block}.article-body-green{border-top:1px solid;border-bottom:1px solid}/* Activity dropdown */ .article-body ul.activity-dropdown li{text-align:left;border-bottom:1px solid;padding:10px 10px 10px 30px;background-repeat:no-repeat;background-position:left center;background-size:17px auto;margin:0}.article-body ul.activity-dropdown li span{float:right;font-size:.8em}.article-body ul.activity-dropdown li img{width:30%;display:block;margin:20px 0 0}/* Article intro */ .article-intro h1{margin:0 0 10px;font-size:2.1em;text-indent:initial}.article-intro .tutorialimage:nth-of-type(1){float:right;margin:0 0 20px 20px;width:50% !important;min-width:260px}.article-intro .featured-image{display:none}.article-intro .tag1{display:inline-block;font-size:.78em;padding:2px 8px;margin:0 2px;border:1px solid}.article-intro .tag1.blue{border-color:}.article-intro .tag1.green{border-color:}.article-intro .tag1.purple{border-color:}.article-intro .failure-card{border:1px solid;padding:14px 18px;margin:12px 0}.article-intro .note-box{border:1px solid;padding:14px 18px;margin:16px 0;font-size:.93em}.article-intro .quote-box{border-left:4px solid;margin:20px 0;padding:12px 20px}.article-intro .guardrail-card{border:1px solid;padding:18px 22px;margin:16px 0;border-left:4px solid}.article-intro .guardrail-card.g1{border-left-color:}.article-intro .guardrail-card h3{margin-top:0;margin-bottom:8px;font-size:1.05em}.article-intro .guardrail-card p{margin:0}/* Previous/Next */ .previous-next-links{line-height:24px;overflow:hidden;padding:10px 30px;border-top:1px solid;border-bottom:1px solid;font-size:15px;border:1px solid;box-sizing:border-box}.previous-design-link{float:left}.next-design-link{float:right}/* ========================= Code blocks ========================= */ div.example{width:96%;margin:10px 0;padding:12px;border:1px solid;position:relative}div.example_code{position:relative;margin-top:8px;padding:6px 8px;border:1px solid;font-size:13px;line-height:1.6;word-break:normal;overflow-x:auto}div.example_result{margin-top:10px;padding:12px;border:1px solid}div.code{margin:12px 0;padding:12px 14px;border:1px solid;font-size:13px;line-height:1.6;overflow-x:auto}div.code div,div.code p,div.example_code p{font-size:inherit}pre.prettyprint{padding:14px 16px;margin:12px 0;border:1px solid;overflow-x:auto;font-size:13px;line-height:1.6;border:1px solid;border-left-width:4px}ol.linenums{padding:0;list-style-position:inside;overflow:auto}/* Syntax highlighting – hljs */ div.hljs{display:block;overflow-x:auto;padding:3px 5px}/* Copy button */ .copy-code-button{display:none;border:1px solid;cursor:pointer;font-size:16px;text-align:center;line-height:1.42rem;margin:0;padding:6px;position:absolute !important;top:4px !important;right:2px !important;box-sizing:inherit}/* Right-list button */ .right-list button{top:24px !important;margin-top:12px;display:none;float:right}/* ========================= Tables ========================= */ table.browsersupport{border:1px solid;border-collapse:collapse}table.browsersupport th{border:1px solid;padding:3px;vertical-align:middle}table.browsersupport td{border:1px solid;padding:3px;vertical-align:middle;width:60px;height:32px;background-position:center;background-repeat:no-repeat;text-align:center}table.browsersupport td.bsProperty{white-space:nowrap;text-align:left}table.browserref{border-collapse:collapse;width:100%}table.browserref th{height:32px;background-repeat:no-repeat;background-position:center;border:1px solid;padding:5px;vertical-align:middle}table.browserref td{border:1px solid;text-align:center;padding:5px 5px 7px;vertical-align:top}table.lamp{width:100%;padding:0;border:1px solid}table.lamp th{padding:10px 5px 10px 10px}table.lamp td{padding:4px 10px 4px 0}table.reference,table.tecspec{border-collapse:collapse;width:100%;margin:4px 0}table.tecspec td,table.tecspec th{border:1px solid;padding:5px 5px 7px;vertical-align:top;text-align:left}table.reference .fa{font-size:24px}table.reference th{border:1px solid;font-size:14px;padding:10px 14px;vertical-align:top;text-align:left}tr td:first-child{min-width:25px}table.reference td{line-height:2em;min-width:24px;border:1px solid;padding:5px 5px 7px;vertical-align:top}table.reference td.example_code{vertical-align:bottom}table.summary{border:1px solid;padding:5px;font-size:100%}/* ========================= Widgets ========================= */ .widget{position:relative;clear:both;width:auto;margin-bottom:2em;overflow:hidden}.widget-header{position:relative;height:40px;line-height:40px;border:1px solid;background-clip:padding-box}.widget-header h3{position:relative;top:2px;left:10px;display:inline-block;margin-right:3em;font-size:14px;line-height:18px}.widget-header .fa{display:inline-block;margin-left:13px;margin-right:-2px;font-size:16px;vertical-align:middle}.widget-content{padding:20px 15px 15px;border:1px solid}.widget-header + .widget-content{border-top-left-radius:0;border-top-right-radius:0}.widget-nopad .widget-content{padding:0}.widget-content::before,.widget-content::after{display:table}.widget-content::after{clear:both}.widget-table .widget-content{padding:0}.widget-table .table{margin-bottom:0}.widget-plain .widget-content{padding:0}/* ========================= Shortcuts ========================= */ .shortcuts{text-align:center}.shortcuts a{float:left}.shortcuts .shortcut{width:12.4%;display:inline-block;padding:12px 0;margin:0 .9% 1em;vertical-align:top}.shortcuts .shortcut-label{display:block;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}/* ========================= Code list ========================= */ .codelist{overflow:hidden}.codelist a{width:72px;margin:0 5px 8px;float:left;text-align:center;font-size:12px;height:65px;overflow:hidden}.codelist .codeicon{margin:0 auto 5px;display:block}.codelist a.item-top{width:28%;margin:0 8px 10px 0;text-align:left;height:80px;padding:6px 16px}.codelist a.item-top .codeicon{float:left;margin-left:10px;margin-right:10px}.codelist a.item-top h4{font-size:16px;margin:10px 0;line-height:1.1;text-align:left}.codelist a.item-top strong{display:block;text-align:left}.codelist h2{font-size:18px;margin:12px 0;border-bottom:1px solid}/* ========================= Chapter nav ========================= */ div.chapter{font-size:140%;width:100%;line-height:40px;height:40px;margin-bottom:10px;border-bottom:solid 1px;padding-bottom:8px}div.chapter div.prev{width:40%;float:left;text-align:left;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding-left:10px}div.chapter div.next{width:48%;float:right;text-align:right;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding-right:10px}/* ========================= Misc UI ========================= */ .marked{padding:.2em}h2.left{font-size:1.3em;margin-bottom:4px}span.new{float:right;padding:0 1px;border:1px solid;line-height:16px}h2.example,h2.example_head{margin-top:0}h2.example{font-size:120%}h2.example_head{font-size:140%}h2.home{margin:0 0 5px;font-size:120%;padding:1px}h2.tutheader{margin:0;padding-top:5px;border-top:1px solid;clear:both}div.tutintro{width:auto;min-height:92px}div.tutintro img{float:left;margin-right:20px;margin-bottom:10px}div.tutintro p{margin-top:0;font-size:14px}.article-heading h3{font-size:1.5em}.hl-main{position:relative;min-height:30px;white-space:pre-wrap;word-break:break-all;word-wrap:break-word}.hl-table{font-size:12px;border:solid 1px}/* ========================= Archive / Gallery ========================= */ .article-feature-home{margin:0 0 20px;border:1px solid}.article-feature-heading{border-bottom:1px solid;padding:20px}.article-feature-body{padding:20px}.article-feature-body .tutorialimage{display:none}.article-feature-heading h2{margin:0 0 10px;font-size:1.8em}.article-feature-heading h3{font-size:1.2em}.article-feature-home p{margin:0 0 20px;font-size:1.2em}.home_feature_thumbnail{margin:0 0 20px}.archive-list{margin:0 0 20px;border:1px solid;overflow:hidden}.archive-list-item:nth-child(even){border-top:1px solid;border-bottom:1px solid}.archive-list-item{padding:20px;overflow:hidden}.archive-list-item h2{margin:0 0 10px;font-size:1.2em}.archive-list-item p{margin:0 0 10px}.archive-list-item .tutorialimage{display:none}.archive-list .categories{white-space:nowrap}.archive-list .archive-list-item img{float:left;margin:0 20px 10px 0;width:90%}.home-latest-articles .archive-list-item img{float:right !important;margin:0 0 10px 20px;width:35%}.archive-list-item .colors a{display:block;float:left;text-indent:-9999px;width:10px;height:10px}.archive-list-item img.wp-post-image{max-height:109px;float:left;width:25%}.archive-list-item .post-intro{float:right;width:70%}.archive-gallery .archive-list-item img.gallery-image{float:left;width:47%}.archive-gallery .archive-list-item .design-information{float:right;width:47%}.archive-gallery .archive-list-item img{width:45%}.image-layout-style .archive-list-item{width:47.5%;float:left;overflow:hidden;margin:0 1% 10px 0;padding:1%}.image-layout-style .author,.image-layout-style .categories,.image-layout-style .colors,.image-layout-style .date,.image-layout-style h2,.image-layout-style p{display:none}.image-layout-style .archive-list-item img{display:block;width:100% !important;margin:0}.image-layout-style .image-alternative{width:90%;padding:15% 5%;height:50px;text-indent:0;font-size:1.4em}.image-layout-style .archive-list-item:nth-child(even){margin:0 0 10px}.gallery-layout-toggle{margin-top:24px}.archive-options .choose-color{overflow:hidden}.archive-options .choose-color a{display:block;float:left;text-indent:-9999px;width:15px;height:15px;margin:0 5px 5px 0}.archive-options .choose-color a.remove_filter{text-indent:0}/* ========================= Design details ========================= */ .design-image{padding:20px 0;width:100%;text-align:center}.design-image img{width:94%}.design-image-detail{overflow:hidden;margin:0 0 20px;padding:20px 0;width:100%;text-align:center}.design-image-detail img{width:44%;margin:0 3%;float:left}.design-image img,.design-image-detail img,.gallery-image{border:3px solid;box-sizing:border-box}.design-details{overflow:hidden}.design-description{width:45%;margin:0 5% 0 0;float:left;min-width:198px}.design-meta{width:45%;float:left;min-width:198px}.design-page .author,.design-page .categories,.design-page .design-colors,.design-page .rating{border-bottom:1px solid;width:100%;padding:10px 0 10px 25px;margin:0;display:block}.related-designs{overflow:hidden}.related-designs img{width:30%;margin:5px 3% 5px 0;float:left}/* ========================= Card ========================= */ .card{overflow:hidden;width:100%;max-width:100%;text-align:left;margin-bottom:18px}.card-header{padding:16px}.card-header h2{margin:0;font-size:1.5rem}.card-content{padding:16px}.card-content p{margin:0;line-height:2;font-size:1.2em}/* ========================= Quiz ========================= */ .quiz-container{padding:1em;max-width:100%;margin:1em auto}#quiz-header,#quiz-start-screen,#quiz-results-screen,#quiz-counter{text-align:center}.question-container p{font-size:16px}.answers{list-style:none;padding:0}.answers a{display:block;margin-bottom:.5em;font-size:14px}.answers a.correct{padding:.5em 1em}.answers a.incorrect{padding:.5em 1em}#quiz-controls{border:1px solid !important;padding:5px !important;margin-bottom:15px !important;text-align:center}#quiz-response{font-size:14px}#quiz-results{font-size:1.25em}#quiz-buttons a,.quiz-container .quiz-button{display:inline-block;padding:.5em 1em}.quiz-results-state #quiz-controls{padding:0}/* ========================= Footer ========================= */ .footer{padding:20px 0;margin-top:20px}.footer span{padding:10px 0 0}.footer a,.footer p{margin:0 0 10px}#footer{min-width:100%;margin-top:20px !important}#footer .runoob-block{border-top:1px solid;border-bottom:1px solid;padding-bottom:50px}#footer .runoob-block .runoob{width:64%;margin:0 auto;min-height:200px}#footer .runoob dl{width:15%;padding-left:30px;margin:25px 0;float:left;border-left:1px solid;min-height:175px}#footer .runoob dl dt{font-size:14px}#footer .runoob dl dd{font-size:12px;margin-top:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#footer .runoob a{padding-left:5px}#footer .search-share{width:16%;float:left;min-height:226px;border-left:1px solid;padding:20px 0 0 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