@mhg/blog
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overflow: hidden;\n margin-bottom: -100px;\n}\n.cover-wrapper .cover-bg {\n position: absolute;\n width: 100%;\n height: 100%;\n background-position: center;\n background-size: cover;\n -webkit-background-size: cover;\n -moz-background-size: cover;\n}\n.cover-wrapper .cover-bg.lazyload:not(.loaded) {\n opacity: 0;\n -webkit-opacity: 0;\n -moz-opacity: 0;\n}\n.cover-wrapper .cover-bg.lazyload.loaded {\n animation-delay: 0s;\n animation-duration: 0.5s;\n animation-fill-mode: forwards;\n animation-timing-function: ease-out;\n animation-name: fadeIn;\n}\n@-moz-keyframes fadeIn {\n 0% {\n opacity: 0;\n -webkit-opacity: 0;\n -moz-opacity: 0;\n filter: blur(12px);\n transform: scale(1.02);\n -webkit-transform: scale(1.02);\n -khtml-transform: scale(1.02);\n -moz-transform: scale(1.02);\n -o-transform: scale(1.02);\n -ms-transform: scale(1.02);\n }\n 100% {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n@-webkit-keyframes fadeIn {\n 0% {\n opacity: 0;\n -webkit-opacity: 0;\n -moz-opacity: 0;\n filter: blur(12px);\n transform: scale(1.02);\n -webkit-transform: scale(1.02);\n -khtml-transform: scale(1.02);\n -moz-transform: scale(1.02);\n -o-transform: scale(1.02);\n -ms-transform: scale(1.02);\n }\n 100% {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n@-o-keyframes fadeIn {\n 0% {\n opacity: 0;\n -webkit-opacity: 0;\n -moz-opacity: 0;\n filter: blur(12px);\n transform: scale(1.02);\n -webkit-transform: scale(1.02);\n -khtml-transform: scale(1.02);\n -moz-transform: scale(1.02);\n -o-transform: scale(1.02);\n -ms-transform: scale(1.02);\n }\n 100% {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n@keyframes fadeIn {\n 0% {\n opacity: 0;\n -webkit-opacity: 0;\n -moz-opacity: 0;\n filter: blur(12px);\n transform: scale(1.02);\n -webkit-transform: scale(1.02);\n -khtml-transform: scale(1.02);\n -moz-transform: scale(1.02);\n -o-transform: scale(1.02);\n -ms-transform: scale(1.02);\n }\n 100% {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n.cover-wrapper .cover-body {\n z-index: 1;\n position: relative;\n width: 100%;\n height: 100%;\n}\n.cover-wrapper#full {\n height: calc(100vh + 100px);\n padding-bottom: 100px;\n}\n.cover-wrapper#half {\n max-height: 640px;\n min-height: 400px;\n height: calc(36vh - 64px + 200px);\n}\n.cover-wrapper #scroll-down {\n width: 100%;\n height: 64px;\n position: absolute;\n bottom: 100px;\n text-align: center;\n cursor: pointer;\n}\n.cover-wrapper #scroll-down .scroll-down-effects {\n color: #fff;\n font-size: 24px;\n line-height: 64px;\n position: absolute;\n width: 24px;\n left: calc(50% - 12px);\n text-shadow: 0 1px 2px rgba(0,0,0,0.1);\n animation: scroll-down-effect 1.5s infinite;\n -webkit-animation: scroll-down-effect 1.5s infinite;\n -khtml-animation: scroll-down-effect 1.5s infinite;\n -moz-animation: scroll-down-effect 1.5s infinite;\n -o-animation: scroll-down-effect 1.5s infinite;\n -ms-animation: scroll-down-effect 1.5s infinite;\n}\n@-moz-keyframes scroll-down-effect {\n 0% {\n top: 0;\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n 50% {\n top: -16px;\n opacity: 0.4;\n -webkit-opacity: 0.4;\n -moz-opacity: 0.4;\n }\n 100% {\n top: 0;\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n@-webkit-keyframes scroll-down-effect {\n 0% {\n top: 0;\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n 50% {\n top: -16px;\n opacity: 0.4;\n -webkit-opacity: 0.4;\n -moz-opacity: 0.4;\n }\n 100% {\n top: 0;\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n@-o-keyframes scroll-down-effect {\n 0% {\n top: 0;\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n 50% {\n top: -16px;\n opacity: 0.4;\n -webkit-opacity: 0.4;\n -moz-opacity: 0.4;\n }\n 100% {\n top: 0;\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n@keyframes scroll-down-effect {\n 0% {\n top: 0;\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n 50% {\n top: -16px;\n opacity: 0.4;\n -webkit-opacity: 0.4;\n -moz-opacity: 0.4;\n }\n 100% {\n top: 0;\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n.cover-wrapper .cover-body {\n margin-top: 64px;\n margin-bottom: 100px;\n}\n.cover-wrapper .cover-body,\n.cover-wrapper .cover-body .top,\n.cover-wrapper .cover-body .bottom {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: -ms-flexbox /* TWEENER - IE 10 */;\n display: -webkit-flex /* NEW - Chrome */;\n display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;\n display: flex;\n -webkit-box-direction: normal;\n -moz-box-direction: normal;\n -webkit-box-orient: vertical;\n -moz-box-orient: vertical;\n -webkit-flex-direction: column;\n -ms-flex-direction: column;\n flex-direction: column;\n align-items: center;\n justify-content: center;\n -webkit-justify-content: center;\n -khtml-justify-content: center;\n -moz-justify-content: center;\n -o-justify-content: center;\n -ms-justify-content: center;\n max-width: 100%;\n}\n.cover-wrapper .cover-body .bottom {\n margin-top: 32px;\n}\n.cover-wrapper .cover-body .title {\n font-family: \"Varela Round\", \"PingFang SC\", \"Microsoft YaHei\", Helvetica, Arial, Helvetica, monospace;\n font-size: 3.125rem;\n line-height: 1.2;\n text-shadow: 0 1px 2px rgba(0,0,0,0.1);\n}\n.cover-wrapper .cover-body .subtitle {\n font-size: 20px;\n}\n.cover-wrapper .cover-body .logo {\n max-height: 120px;\n max-width: calc(100% - 4 * 16px);\n}\n@media screen and (min-height: 1024px) {\n .cover-wrapper .cover-body .title {\n font-size: 3rem;\n }\n .cover-wrapper .cover-body .subtitle {\n font-size: 1.05rem;\n }\n .cover-wrapper .cover-body .logo {\n max-height: 150px;\n }\n}\n.cover-wrapper .cover-body .m_search {\n position: relative;\n max-width: calc(100% - 16px);\n width: 320px;\n vertical-align: middle;\n}\n.cover-wrapper .cover-body .m_search .form {\n position: relative;\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: block;\n width: 100%;\n}\n.cover-wrapper .cover-body .m_search .icon,\n.cover-wrapper .cover-body .m_search .input {\n transition: all 0.28s ease;\n -webkit-transition: all 0.28s ease;\n -khtml-transition: all 0.28s ease;\n -moz-transition: all 0.28s ease;\n -o-transition: all 0.28s ease;\n -ms-transition: all 0.28s ease;\n}\n.cover-wrapper .cover-body .m_search .icon {\n position: absolute;\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: block;\n line-height: 2.5rem;\n width: 32px;\n top: 0;\n left: 5px;\n color: rgba(68,68,68,0.75);\n}\n.cover-wrapper .cover-body .m_search .input {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: block;\n height: 2.5rem;\n width: 100%;\n box-shadow: none;\n -webkit-box-shadow: none;\n box-sizing: border-box;\n -webkit-box-sizing: border-box;\n -moz-box-sizing: border-box;\n font-size: 0.875rem;\n -webkit-appearance: none;\n padding-left: 36px;\n border-radius: 1.4rem;\n -webkit-border-radius: 1.4rem;\n background: rgba(255,255,255,0.6);\n backdrop-filter: blur(10px);\n border: none;\n color: var(--color-text);\n}\n@media screen and (max-width: 500px) {\n .cover-wrapper .cover-body .m_search .input {\n padding-left: 36px;\n }\n}\n.cover-wrapper .cover-body .m_search .input:hover {\n background: rgba(255,255,255,0.8);\n}\n.cover-wrapper .cover-body .m_search .input:focus {\n background: #fff;\n}\n.cover-wrapper .list-h {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: -ms-flexbox /* TWEENER - IE 10 */;\n display: -webkit-flex /* NEW - Chrome */;\n display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;\n display: flex;\n -webkit-box-direction: normal;\n -moz-box-direction: normal;\n -webkit-box-orient: horizontal;\n -moz-box-orient: horizontal;\n -webkit-flex-direction: row;\n -ms-flex-direction: row;\n flex-direction: row;\n flex-wrap: wrap;\n -webkit-flex-wrap: wrap;\n -khtml-flex-wrap: wrap;\n -moz-flex-wrap: wrap;\n -o-flex-wrap: wrap;\n -ms-flex-wrap: wrap;\n align-items: stretch;\n border-radius: 4px;\n -webkit-border-radius: 4px;\n user-select: none;\n -webkit-user-select: none;\n -moz-user-select: none;\n -ms-user-select: none;\n}\n.cover-wrapper .list-h a {\n -webkit-box-flex: 1;\n -moz-box-flex: 1;\n -webkit-flex: 1 0;\n -ms-flex: 1 0;\n flex: 1 0;\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: -ms-flexbox /* TWEENER - IE 10 */;\n display: -webkit-flex /* NEW - Chrome */;\n display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;\n display: flex;\n font-weight: 600;\n}\n.cover-wrapper .list-h a img {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: block;\n border-radius: 2px;\n -webkit-border-radius: 2px;\n margin: 4px;\n min-width: 40px;\n max-width: 44px;\n}\n@media screen and (max-width: 768px) {\n .cover-wrapper .list-h a img {\n min-width: 36px;\n max-width: 40px;\n }\n}\n@media screen and (max-width: 500px) {\n .cover-wrapper .list-h a img {\n margin: 2px 4px;\n min-width: 32px;\n max-width: 36px;\n }\n}\n@media screen and (max-width: 375px) {\n .cover-wrapper .list-h a img {\n min-width: 28px;\n max-width: 32px;\n }\n}\n.cover-wrapper {\n max-width: 100%;\n}\n.cover-wrapper.search .bottom .menu {\n margin-top: 16px;\n}\n.cover-wrapper.search .bottom .menu .list-h a {\n white-space: nowrap;\n -webkit-box-direction: normal;\n -moz-box-direction: normal;\n -webkit-box-orient: horizontal;\n -moz-box-orient: horizontal;\n -webkit-flex-direction: row;\n -ms-flex-direction: row;\n flex-direction: row;\n align-items: baseline;\n padding: 2px;\n margin: 4px;\n color: var(--color-site-inner);\n opacity: 0.75;\n -webkit-opacity: 0.75;\n -moz-opacity: 0.75;\n text-shadow: 0 1px 2px rgba(0,0,0,0.05);\n border-bottom: 2px solid transparent;\n}\n.cover-wrapper.search .bottom .menu .list-h a i {\n margin-right: 4px;\n}\n.cover-wrapper.search .bottom .menu .list-h a p {\n font-size: 0.9375rem;\n}\n.cover-wrapper.search .bottom .menu .list-h a:hover,\n.cover-wrapper.search .bottom .menu .list-h a.active,\n.cover-wrapper.search .bottom .menu .list-h a:active {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n border-bottom: 2px solid var(--color-site-inner);\n}\n.cover-wrapper.dock .menu,\n.cover-wrapper.featured .menu,\n.cover-wrapper.focus .menu {\n border-radius: 6px;\n -webkit-border-radius: 6px;\n}\n.cover-wrapper.dock .menu .list-h a,\n.cover-wrapper.featured .menu .list-h a,\n.cover-wrapper.focus .menu .list-h a {\n -webkit-box-direction: normal;\n -moz-box-direction: normal;\n -webkit-box-orient: vertical;\n -moz-box-orient: vertical;\n -webkit-flex-direction: column;\n -ms-flex-direction: column;\n flex-direction: column;\n align-items: center;\n padding: 12px;\n line-height: 24px;\n border-radius: 4px;\n -webkit-border-radius: 4px;\n border-bottom: none;\n text-align: center;\n align-content: flex-end;\n color: rgba(68,68,68,0.7);\n font-size: 1.5rem;\n}\n@media screen and (max-width: 500px) {\n .cover-wrapper.dock .menu .list-h a,\n .cover-wrapper.featured .menu .list-h a,\n .cover-wrapper.focus .menu .list-h a {\n padding: 12px 8px;\n }\n}\n.cover-wrapper.dock .menu .list-h a i,\n.cover-wrapper.featured .menu .list-h a i,\n.cover-wrapper.focus .menu .list-h a i {\n margin: 8px;\n}\n.cover-wrapper.dock .menu .list-h a p,\n.cover-wrapper.featured .menu .list-h a p,\n.cover-wrapper.focus .menu .list-h a p {\n font-size: 0.875rem;\n}\n.cover-wrapper.dock .menu .list-h a.active,\n.cover-wrapper.featured .menu .list-h a.active,\n.cover-wrapper.focus .menu .list-h a.active {\n background: var(--color-card);\n backdrop-filter: none;\n}\n.cover-wrapper.dock .menu .list-h a.active i,\n.cover-wrapper.featured .menu .list-h a.active i,\n.cover-wrapper.focus .menu .list-h a.active i,\n.cover-wrapper.dock .menu .list-h a.active i+p,\n.cover-wrapper.featured .menu .list-h a.active i+p,\n.cover-wrapper.focus .menu .list-h a.active i+p {\n color: #2196f3;\n}\n.cover-wrapper.dock .menu .list-h a.active img+p,\n.cover-wrapper.featured .menu .list-h a.active img+p,\n.cover-wrapper.focus .menu .list-h a.active img+p {\n color: var(--color-text);\n}\n.cover-wrapper.dock .menu .list-h a:hover,\n.cover-wrapper.featured .menu .list-h a:hover,\n.cover-wrapper.focus .menu .list-h a:hover {\n background: var(--color-card);\n}\n.cover-wrapper.featured .menu .list-h {\n margin: -2px;\n}\n.cover-wrapper.featured .menu .list-h a {\n margin: 2px;\n background: rgba(255,255,255,0.5);\n}\n@supports (backdrop-filter: blur(20px)) {\n .cover-wrapper.featured .menu .list-h a {\n background: rgba(255,255,255,0.5);\n backdrop-filter: saturate(200%) blur(20px);\n }\n}\n@media (prefers-color-scheme: dark) {\n :root {\n --color-mode: 'dark';\n }\n :root:not([color-scheme]) {\n --color-site-body: #121212;\n --color-read-bkg: #21232f;\n --color-read-post: #252d38;\n --color-site-bg: #21232f;\n --color-site-inner: #efefef;\n --color-site-footer: #666;\n --color-card: #252d38;\n --color-text: rgba(238,238,238,0.871);\n --color-block: rgba(68,68,68,0.65);\n --color-codeblock: #444;\n --color-inlinecode: #d56d28;\n --color-h1: rgba(255,255,255,0.871);\n --color-h2: rgba(255,255,255,0.871);\n --color-h3: rgba(255,255,255,0.6);\n --color-h4: rgba(255,255,255,0.6);\n --color-h5: rgba(255,255,255,0.6);\n --color-h6: rgba(255,255,255,0.6);\n --color-p: rgba(217,217,217,0.871);\n --color-list: rgba(217,217,217,0.871);\n --color-list-hl: #4dabf5;\n --color-meta: rgba(191,191,191,0.871);\n --color-link: rgba(191,191,191,0.871);\n --color-copyright-bkg: #21252b;\n }\n :root:not([color-scheme]) img {\n filter: brightness(70%) !important;\n }\n :root:not([color-scheme]) .blur {\n background: rgba(33,35,47,0.9) !important;\n }\n :root:not([color-scheme]) .white-box.blur {\n background: rgba(37,45,56,0.9) !important;\n }\n :root:not([color-scheme]) .nav-main .u-search-input {\n background: var(--color-card) !important;\n }\n :root:not([color-scheme]) #l_main .article .prev-next>a {\n background: var(--color-block) !important;\n }\n :root:not([color-scheme]) #l_main .article .prev-next>a:hover {\n background: var(--color-site-bg) !important;\n }\n :root:not([color-scheme]) .article blockquote {\n background: var(--color-block) !important;\n }\n :root:not([color-scheme]) .article-title a {\n color: var(--color-h1) !important;\n }\n :root:not([color-scheme]) details>summary {\n color: var(--color-p) !important;\n background: var(--color-site-bg) !important;\n }\n :root:not([color-scheme]) details {\n border: 1px solid var(--color-site-bg) !important;\n background: var(--color-site-bg) !important;\n }\n :root:not([color-scheme]) #u-search .modal,\n :root:not([color-scheme]) #u-search .modal-header,\n :root:not([color-scheme]) #u-search .modal-body {\n background: var(--color-card) !important;\n }\n :root:not([color-scheme]) #u-search .modal-body .modal-results .result:hover {\n background: var(--color-block) !important;\n }\n :root:not([color-scheme]) .u-search-input:hover {\n background: var(--color-block) !important;\n }\n :root:not([color-scheme]) .u-search-input:focus {\n background: var(--color-site-body) !important;\n }\n}\n[color-scheme='dark'] {\n --color-site-body: #121212;\n --color-read-bkg: #21232f;\n --color-read-post: #252d38;\n --color-site-bg: #21232f;\n --color-site-inner: #efefef;\n --color-site-footer: #666;\n --color-card: #252d38;\n --color-text: rgba(238,238,238,0.871);\n --color-block: rgba(68,68,68,0.65);\n --color-codeblock: #444;\n --color-inlinecode: #d56d28;\n --color-h1: rgba(255,255,255,0.871);\n --color-h2: rgba(255,255,255,0.871);\n --color-h3: rgba(255,255,255,0.6);\n --color-h4: rgba(255,255,255,0.6);\n --color-h5: rgba(255,255,255,0.6);\n --color-h6: rgba(255,255,255,0.6);\n --color-p: rgba(217,217,217,0.871);\n --color-list: rgba(217,217,217,0.871);\n --color-list-hl: #4dabf5;\n --color-meta: rgba(191,191,191,0.871);\n --color-link: rgba(191,191,191,0.871);\n --color-copyright-bkg: #21252b;\n}\n[color-scheme='dark'] img {\n filter: brightness(70%) !important;\n}\n[color-scheme='dark'] .blur {\n background: rgba(33,35,47,0.9) !important;\n}\n[color-scheme='dark'] .white-box.blur {\n background: rgba(37,45,56,0.9) !important;\n}\n[color-scheme='dark'] .nav-main .u-search-input {\n background: var(--color-card) !important;\n}\n[color-scheme='dark'] #l_main .article .prev-next>a {\n background: var(--color-block) !important;\n}\n[color-scheme='dark'] #l_main .article .prev-next>a:hover {\n background: var(--color-site-bg) !important;\n}\n[color-scheme='dark'] .article blockquote {\n background: var(--color-block) !important;\n}\n[color-scheme='dark'] .article-title a {\n color: var(--color-h1) !important;\n}\n[color-scheme='dark'] details>summary {\n color: var(--color-p) !important;\n background: var(--color-site-bg) !important;\n}\n[color-scheme='dark'] details {\n border: 1px solid var(--color-site-bg) !important;\n background: var(--color-site-bg) !important;\n}\n[color-scheme='dark'] #u-search .modal,\n[color-scheme='dark'] #u-search .modal-header,\n[color-scheme='dark'] #u-search .modal-body {\n background: var(--color-card) !important;\n}\n[color-scheme='dark'] #u-search .modal-body .modal-results .result:hover {\n background: var(--color-block) !important;\n}\n[color-scheme='dark'] .u-search-input:hover {\n background: var(--color-block) !important;\n}\n[color-scheme='dark'] .u-search-input:focus {\n background: var(--color-site-body) !important;\n}\n@media screen and (max-width: 500px) {\n [color-scheme='dark'] .l_header .m_search {\n background: var(--color-site-bg) !important;\n }\n}\n@font-face {\n font-family: 'Varela Round';\n src: url(\"https://unpkg.com/volantis-static@0.0.1660614606622/media/fonts/VarelaRound/VarelaRound-Regular.ttf\");\n font-weight: 'normal';\n font-style: 'normal';\n font-display: swap;\n}\n@font-face {\n font-family: 'Varela Round';\n src: url(\"https://unpkg.com/volantis-static@0.0.1660614606622/media/fonts/VarelaRound/VarelaRound-Regular.ttf\");\n font-weight: 'normal';\n font-style: 'normal';\n font-display: swap;\n}\n.l_header {\n position: fixed;\n z-index: 1000;\n top: 0;\n width: 100%;\n height: 64px;\n background: var(--color-card);\n box-shadow: 0 1px 2px 0px rgba(0,0,0,0.1);\n -webkit-box-shadow: 0 1px 2px 0px rgba(0,0,0,0.1);\n}\n.l_header.auto {\n transition: opacity 0.4s ease;\n -webkit-transition: opacity 0.4s ease;\n -khtml-transition: opacity 0.4s ease;\n -moz-transition: opacity 0.4s ease;\n -o-transition: opacity 0.4s ease;\n -ms-transition: opacity 0.4s ease;\n visibility: hidden;\n}\n.l_header.auto.show {\n opacity: 1 !important;\n -webkit-opacity: 1 !important;\n -moz-opacity: 1 !important;\n visibility: visible;\n}\n.l_header .container {\n margin-left: 16px;\n margin-right: 16px;\n}\n.l_header #wrapper {\n height: 100%;\n user-select: none;\n -webkit-user-select: none;\n -moz-user-select: none;\n -ms-user-select: none;\n}\n.l_header #wrapper .nav-main,\n.l_header #wrapper .nav-sub {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: -ms-flexbox /* TWEENER - IE 10 */;\n display: -webkit-flex /* NEW - Chrome */;\n display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;\n display: flex;\n flex-wrap: nowrap;\n -webkit-flex-wrap: nowrap;\n -khtml-flex-wrap: nowrap;\n -moz-flex-wrap: nowrap;\n -o-flex-wrap: nowrap;\n -ms-flex-wrap: nowrap;\n justify-content: space-between;\n -webkit-justify-content: space-between;\n -khtml-justify-content: space-between;\n -moz-justify-content: space-between;\n -o-justify-content: space-between;\n -ms-justify-content: space-between;\n align-items: center;\n}\n.l_header #wrapper .nav-main {\n transition: all 0.28s ease;\n -webkit-transition: all 0.28s ease;\n -khtml-transition: all 0.28s ease;\n -moz-transition: all 0.28s ease;\n -o-transition: all 0.28s ease;\n -ms-transition: all 0.28s ease;\n}\n.l_header #wrapper.sub .nav-main {\n transform: translateY(-64px);\n -webkit-transform: translateY(-64px);\n -khtml-transform: translateY(-64px);\n -moz-transform: translateY(-64px);\n -o-transform: translateY(-64px);\n -ms-transform: translateY(-64px);\n}\n.l_header #wrapper .nav-sub {\n transition: all 0.28s ease;\n -webkit-transition: all 0.28s ease;\n -khtml-transition: all 0.28s ease;\n -moz-transition: all 0.28s ease;\n -o-transition: all 0.28s ease;\n -ms-transition: all 0.28s ease;\n opacity: 0;\n -webkit-opacity: 0;\n -moz-opacity: 0;\n height: 64px;\n width: calc(100% - 2 * 16px);\n position: absolute;\n}\n.l_header #wrapper .nav-sub ::-webkit-scrollbar {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: none;\n}\n@media screen and (min-width: 2048px) {\n .l_header #wrapper .nav-sub {\n max-width: 55vw;\n margin: auto;\n }\n}\n.l_header #wrapper.sub .nav-sub {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n}\n.l_header #wrapper .title {\n position: relative;\n color: var(--color-text);\n padding-left: 24px;\n max-height: 64px;\n}\n.l_header #wrapper .nav-main .title {\n white-space: nowrap;\n overflow: hidden;\n text-overflow: ellipsis;\n flex-shrink: 0;\n line-height: 64px;\n padding: 0 24px;\n font-size: 1.25rem;\n font-family: \"Varela Round\", \"PingFang SC\", \"Microsoft YaHei\", Helvetica, Arial, Helvetica, monospace;\n}\n.l_header #wrapper .nav-main .title img {\n height: 64px;\n}\n.l_header .nav-sub {\n max-width: 1080px;\n margin: auto;\n}\n.l_header .nav-sub .title {\n font-weight: bold;\n font-family: \"Varela Round\", \"PingFang SC\", \"Microsoft YaHei\", Helvetica, Arial, Menlo, Monaco, monospace, sans-serif;\n line-height: 1.2;\n max-height: 64px;\n white-space: normal;\n flex-shrink: 1;\n}\n.l_header .switcher {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: none;\n line-height: 64px;\n align-items: center;\n}\n.l_header .switcher .s-toc {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: none;\n}\n@media screen and (max-width: 768px) {\n .l_header .switcher .s-toc {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: -ms-flexbox /* TWEENER - IE 10 */;\n display: -webkit-flex /* NEW - Chrome */;\n display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;\n display: flex;\n }\n}\n.l_header .switcher >li {\n height: 48px;\n transition: all 0.28s ease;\n -webkit-transition: all 0.28s ease;\n -khtml-transition: all 0.28s ease;\n -moz-transition: all 0.28s ease;\n -o-transition: all 0.28s ease;\n -ms-transition: all 0.28s ease;\n margin: 2px;\n}\n@media screen and (max-width: 500px) {\n .l_header .switcher >li {\n margin: 0 1px;\n height: 48px;\n }\n}\n.l_header .switcher >li >a {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: -ms-flexbox /* TWEENER - IE 10 */;\n display: -webkit-flex /* NEW - Chrome */;\n display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;\n display: flex;\n justify-content: center;\n -webkit-justify-content: center;\n -khtml-justify-content: center;\n -moz-justify-content: center;\n -o-justify-content: center;\n -ms-justify-content: center;\n align-items: center;\n width: 48px;\n height: 48px;\n padding: 0.85em 1.1em;\n border-radius: 100px;\n -webkit-border-radius: 100px;\n border: none;\n transition: all 0.28s ease;\n -webkit-transition: all 0.28s ease;\n -khtml-transition: all 0.28s ease;\n -moz-transition: all 0.28s ease;\n -o-transition: all 0.28s ease;\n -ms-transition: all 0.28s ease;\n color: #2196f3;\n}\n.l_header .switcher >li >a:hover {\n border: none;\n}\n.l_header .switcher >li >a.active,\n.l_header .switcher >li >a:active {\n border: none;\n background: var(--color-site-bg);\n}\n@media screen and (max-width: 500px) {\n .l_header .switcher >li >a {\n width: 36px;\n height: 48px;\n }\n}\n.l_header .nav-sub .switcher {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: -ms-flexbox /* TWEENER - IE 10 */;\n display: -webkit-flex /* NEW - Chrome */;\n display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;\n display: flex;\n}\n.l_header .m_search {\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n display: -ms-flexbox /* TWEENER - IE 10 */;\n display: -webkit-flex /* NEW - Chrome */;\n display: flex /* NEW, Spec - Opera 12.1, Firefox 20+ */;\n display: flex;\n height: 64px;\n width: 240px;\n transition: all 0.28s ease;\n -webkit-transition: all 0.28s ease;\n -khtml-transition: all 0.28s ease;\n -moz-transition: all 0.28s ease;\n -o-transition: all 0.28s ease;\n -ms-transition: all 0.28s ease;\n}\n@media screen and (max-width: 1024px) {\n .l_header .m_search {\n width: 44px;\n min-width: 44px;\n }\n .l_header .m_search input::placeholder {\n opacity: 0;\n -webkit-opacity: 0;\n -moz-opacity: 0;\n }\n .l_header .m_search:hover {\n width: 240px;\n }\n .l_header .m_search:hover input::placeholder {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n@media screen and (min-width: 500px) {\n .l_header .m_search:hover .input {\n width: 100%;\n }\n .l_header .m_search:hover .input::placeholder {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n@media screen and (max-width: 500px) {\n .l_header .m_search {\n min-width: 0;\n }\n .l_header .m_search input::placeholder {\n opacity: 1;\n -webkit-opacity: 1;\n -moz-opacity: 1;\n }\n}\n.l_header .m_search .form {\n position: relative;\n display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n display: -moz-box /* OLD - Firefox 19- (bugg