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rgba(0,0,0,0.1);\n  -webkit-box-shadow: 0 2px 4px 0px rgba(0,0,0,0.1), 0 4px 8px 0px rgba(0,0,0,0.1), 0 8px 16px 0px rgba(0,0,0,0.1);\n}\n#l_cover {\n  min-height: 64px;\n}\n.cover-wrapper {\n  top: 0;\n  left: 0;\n  max-width: 100%;\n  height: 100vh;\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  -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  align-self: center;\n  align-content: center;\n  color: var(--color-site-inner);\n  padding: 0 16px;\n  user-select: none;\n  -webkit-user-select: none;\n  -moz-user-select: none;\n  -ms-user-select: none;\n  position: relative;\n  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- (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  width: 100%;\n  align-items: center;\n}\n.l_header .m_search .icon {\n  position: absolute;\n  width: 36px;\n  left: 5px;\n  color: var(--color-meta);\n}\n@media screen and (max-width: 500px) {\n  .l_header .m_search .icon {\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}\n.l_header .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  padding-top: 8px;\n  padding-bottom: 8px;\n  line-height: 1.3;\n  width: 100%;\n  color: var(--color-text);\n  background: #fafafa;\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  padding-left: 40px;\n  font-size: 0.875rem;\n  border-radius: 8px;\n  -webkit-border-radius: 8px;\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}\n@media screen and (min-width: 500px) {\n  .l_header .m_search .input:focus {\n    box-shadow: 0 4px 8px 0px rgba(0,0,0,0.1);\n    -webkit-box-shadow: 0 4px 8px 0px rgba(0,0,0,0.1);\n  }\n}\n@media screen and (max-width: 500px) {\n  .l_header .m_search .input {\n    background: var(--color-block);\n    padding-left: 8px;\n    border: none;\n  }\n  .l_header .m_search .input:hover,\n  .l_header .m_search .input:focus {\n    border: none;\n  }\n}\n@media (max-width: 500px) {\n  .l_header .m_search {\n    left: 0;\n    width: 0;\n    overflow: hidden;\n    position: absolute;\n    background: #fff;\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 .m_search .input {\n    border-radius: 32px;\n    -webkit-border-radius: 32px;\n    margin-left: 16px;\n    padding-left: 16px;\n  }\n  .l_header.z_search-open .m_search {\n    width: 100%;\n  }\n  .l_header.z_search-open .m_search .input {\n    width: calc(100% - 120px);\n  }\n}\nul.m-pc >li>a {\n  color: inherit;\n  border-bottom: 2px solid transparent;\n}\nul.m-pc >li>a:active,\nul.m-pc >li>a.active {\n  border-bottom: 2px solid #2196f3;\n}\nul.m-pc li:hover >ul.list-v,\nul.list-v li:hover >ul.list-v {\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}\nul.nav-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  align-items: stretch;\n}\nul.nav-list-h>li {\n  position: relative;\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  height: 100%;\n  line-height: 2.4;\n  border-radius: 4px;\n  -webkit-border-radius: 4px;\n}\nul.nav-list-h>li >a {\n  -webkit-font-smoothing: antialiased;\n  -moz-osx-font-smoothing: grayscale;\n  font-weight: 600;\n}\nul.list-v {\n  z-index: 1;\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  position: absolute;\n  background: var(--color-card);\n  box-shadow: 0 2px 4px 0px rgba(0,0,0,0.08), 0 4px 8px 0px rgba(0,0,0,0.08), 0 8px 16px 0px rgba(0,0,0,0.08);\n  -webkit-box-shadow: 0 2px 4px 0px rgba(0,0,0,0.08), 0 4px 8px 0px rgba(0,0,0,0.08), 0 8px 16px 0px rgba(0,0,0,0.08);\n  margin-top: -6px;\n  border-radius: 4px;\n  -webkit-border-radius: 4px;\n  padding: 8px 0;\n}\nul.list-v.show {\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}\nul.list-v hr {\n  margin-top: 8px;\n  margin-bottom: 8px;\n}\nul.list-v >li {\n  white-space: nowrap;\n  word-break: keep-all;\n}\nul.list-v >li.header {\n  font-size: 0.78125rem;\n  font-weight: bold;\n  line-height: 2em;\n  color: var(--color-meta);\n  margin: 8px 16px 4px;\n}\nul.list-v >li.header i {\n  margin-right: 8px;\n}\nul.list-v >li ul {\n  margin-left: 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: none;\n  margin-top: -40px;\n}\nul.list-v .aplayer-container {\n  min-height: 64px;\n  padding: 6px 16px;\n}\nul.list-v >li>a {\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  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  color: var(--color-list);\n  font-size: 0.875rem;\n  font-weight: bold;\n  line-height: 36px;\n  padding: 0 20px 0 16px;\n  text-overflow: ellipsis;\n  margin: 0 4px;\n  border-radius: 4px;\n  -webkit-border-radius: 4px;\n}\n@media screen and (max-width: 1024px) {\n  ul.list-v >li>a {\n    line-height: 40px;\n  }\n}\nul.list-v >li>a >i {\n  margin-right: 8px;\n}\nul.list-v >li>a:active,\nul.list-v >li>a.active {\n  color: var(--color-list-hl);\n}\nul.list-v >li>a:hover {\n  color: var(--color-list-hl);\n  background: var(--color-site-bg);\n}\n.l_header .menu >ul>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: block;\n  padding: 0 8px;\n}\n.l_header .menu >ul>li>a >i {\n  margin-right: 4px;\n}\n.l_header ul.nav-list-h>li {\n  color: var(--color-list);\n  line-height: 64px;\n}\n.l_header ul.nav-list-h>li >a {\n  max-height: 64px;\n  overflow: hidden;\n  color: inherit;\n}\n.l_header ul.nav-list-h>li >a:active,\n.l_header ul.nav-list-h>li >a.active {\n  color: #2196f3;\n}\n.l_header ul.nav-list-h>li:hover>a {\n  color: var(--color-list-hl);\n}\n.l_header ul.nav-list-h>li i.music {\n  animation: rotate-effect 1.5s linear infinite;\n  -webkit-animation: rotate-effect 1.5s linear infinite;\n  -khtml-animation: rotate-effect 1.5s linear infinite;\n  -moz-animation: rotate-effect 1.5s linear infinite;\n  -o-animation: rotate-effect 1.5s linear infinite;\n  -ms-animation: rotate-effect 1.5s linear infinite;\n}\n@-moz-keyframes rotate-effect {\n  0% {\n    transform: rotate(0);\n    -webkit-transform: rotate(0);\n    -khtml-transform: rotate(0);\n    -moz-transform: rotate(0);\n    -o-transform: rotate(0);\n    -ms-transform: rotate(0);\n  }\n  25% {\n    transform: rotate(90deg);\n    -webkit-transform: rotate(90deg);\n    -khtml-transform: rotate(90deg);\n    -moz-transform: rotate(90deg);\n    -o-transform: rotate(90deg);\n    -ms-transform: rotate(90deg);\n  }\n  50% {\n    transform: rotate(180deg);\n    -webkit-transform: rotate(180deg);\n    -khtml-transform: rotate(180deg);\n    -moz-transform: rotate(180deg);\n    -o-transform: rotate(180deg);\n    -ms-transform: rotate(180deg);\n  }\n  75% {\n    transform: rotate(270deg);\n    -webkit-transform: rotate(270deg);\n    -khtml-transform: rotate(270deg);\n    -moz-transform: rotate(270deg);\n    -o-transform: rotate(270deg);\n    -ms-transform: rotate(270deg);\n  }\n  100% {\n    transform: rotate(360deg);\n    -webkit-transform: rotate(360deg);\n    -khtml-transform: rotate(360deg);\n    -moz-transform: rotate(360deg);\n    -o-transform: rotate(360deg);\n    -ms-transform: rotate(360deg);\n  }\n}\n@-webkit-keyframes rotate-effect {\n  0% {\n    transform: rotate(0);\n    -webkit-transform: rotate(0);\n    -khtml-transform: rotate(0);\n    -moz-transform: rotate(0);\n    -o-transform: rotate(0);\n    -ms-transform: rotate(0);\n  }\n  25% {\n    transform: rotate(90deg);\n    -webkit-transform: rotate(90deg);\n    -khtml-transform: rotate(90deg);\n    -moz-transform: rotate(90deg);\n    -o-transform: rotate(90deg);\n    -ms-transform: rotate(90deg);\n  }\n  50% {\n    transform: rotate(180deg);\n    -webkit-transform: rotate(180deg);\n    -khtml-transform: rotate(180deg);\n    -moz-transform: rotate(180deg);\n    -o-transform: rotate(180deg);\n    -ms-transform: rotate(180deg);\n  }\n  75% {\n    transform: rotate(270deg);\n    -webkit-transform: rotate(270deg);\n    -khtml-transform: rotate(270deg);\n    -moz-transform: rotate(270deg);\n    -o-transform: rotate(270deg);\n    -ms-transform: rotate(270deg);\n  }\n  100% {\n    transform: rotate(360deg);\n    -webkit-transform: rotate(360deg);\n    -khtml-transform: rotate(360deg);\n    -moz-transform: rotate(360deg);\n    -o-transform: rotate(360deg);\n    -ms-transform: rotate(360deg);\n  }\n}\n@-o-keyframes rotate-effect {\n  0% {\n    transform: rotate(0);\n    -webkit-transform: rotate(0);\n    -khtml-transform: rotate(0);\n    -moz-transform: rotate(0);\n    -o-transform: rotate(0);\n    -ms-transform: rotate(0);\n  }\n  25% {\n    transform: rotate(90deg);\n    -webkit-transform: rotate(90deg);\n    -khtml-transform: rotate(90deg);\n    -moz-transform: rotate(90deg);\n    -o-transform: rotate(90deg);\n    -ms-transform: rotate(90deg);\n  }\n  50% {\n    transform: rotate(180deg);\n    -webkit-transform: rotate(180deg);\n    -khtml-transform: rotate(180deg);\n    -moz-transform: rotate(180deg);\n    -o-transform: rotate(180deg);\n    -ms-transform: rotate(180deg);\n  }\n  75% {\n    transform: rotate(270deg);\n    -webkit-transform: rotate(270deg);\n    -khtml-transform: rotate(270deg);\n    -moz-transform: rotate(270deg);\n    -o-transform: rotate(270deg);\n    -ms-transform: rotate(270deg);\n  }\n  100% {\n    transform: rotate(360deg);\n    -webkit-transform: rotate(360deg);\n    -khtml-transform: rotate(360deg);\n    -moz-transform: rotate(360deg);\n    -o-transform: rotate(360deg);\n    -ms-transform: rotate(360deg);\n  }\n}\n@keyframes rotate-effect {\n  0% {\n    transform: rotate(0);\n    -webkit-transform: rotate(0);\n    -khtml-transform: rotate(0);\n    -moz-transform: rotate(0);\n    -o-transform: rotate(0);\n    -ms-transform: rotate(0);\n  }\n  25% {\n    transform: rotate(90deg);\n    -webkit-transform: rotate(90deg);\n    -khtml-transform: rotate(90deg);\n    -moz-transform: rotate(90deg);\n    -o-transform: rotate(90deg);\n    -ms-transform: rotate(90deg);\n  }\n  50% {\n    transform: rotate(180deg);\n    -webkit-transform: rotate(180deg);\n    -khtml-transform: rotate(180deg);\n    -moz-transform: rotate(180deg);\n    -o-transform: rotate(180deg);\n    -ms-transform: rotate(180deg);\n  }\n  75% {\n    transform: rotate(270deg);\n    -webkit-transform: rotate(270deg);\n    -khtml-transform: rotate(270deg);\n    -moz-transform: rotate(270deg);\n    -o-transform: rotate(270deg);\n    -ms-transform: rotate(270deg);\n  }\n  100% {\n    transform: rotate(360deg);\n    -webkit-transform: rotate(360deg);\n    -khtml-transform: rotate(360deg);\n    -moz-transform: rotate(360deg);\n    -o-transform: rotate(360deg);\n    -ms-transform: rotate(360deg);\n  }\n}\n.menu-phone li ul.list-v {\n  right: calc(100% - 0.5 * 16px);\n}\n.menu-phone li ul.list-v ul {\n  right: calc(100% - 0.5 * 16px);\n}\n#wrapper {\n  max-width: 1080px;\n  margin: auto;\n}\n@media screen and (min-width: 2048px) {\n  #wrapper {\n    max-width: 55vw;\n  }\n}\n#wrapper .menu {\n  -webkit-box-flex: 1;\n  -moz-box-flex: 1;\n  -webkit-flex: 1 1;\n  -ms-flex: 1 1;\n  flex: 1 1;\n  margin: 0 16px 0 0;\n}\n#wrapper .menu .list-v ul {\n  left: calc(100% - 0.5 * 16px);\n}\n.menu-phone {\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  margin-top: 16px;\n  right: 8px;\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.menu-phone ul {\n  right: calc(100% - 0.5 * 16px);\n}\n@media screen and (max-width: 500px) {\n  .menu-phone {\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  }\n}\n.l_header {\n  max-width: 65vw;\n  left: calc((100% - 65vw) * 0.5);\n  border-bottom-left-radius: 8px;\n  border-bottom-right-radius: 8px;\n}\n@media screen and (max-width: 2048px) {\n  .l_header {\n    max-width: 1112px;\n    left: calc((100% - 1112px) * 0.5);\n  }\n}\n@media screen and (max-width: 1112px) {\n  .l_header {\n    left: 0;\n    border-radius: 0;\n    -webkit-border-radius: 0;\n    max-width: 100%;\n  }\n}\n@media screen and (max-width: 500px) {\n  .l_header .container {\n    margin-left: 0;\n    margin-right: 0;\n  }\n  .l_header #wrapper .nav-main .title {\n    padding-left: 16px;\n    padding-right: 16px;\n  }\n  .l_header #wrapper .nav-sub {\n    width: 100%;\n  }\n  .l_header #wrapper .nav-sub .title {\n    overflow-y: scroll;\n    margin-top: 2px;\n    padding: 8px 16px;\n  }\n  .l_header #wrapper .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    margin-right: 8px;\n  }\n  .l_header .menu {\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}\n@media screen and (max-width: 500px) {\n  .list-v li {\n    max-width: 270px;\n  }\n}\n#u-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: none;\n  position: fixed;\n  top: 0;\n  left: 0;\n  width: 100%;\n  height: 100%;\n  padding: 60px 20px;\n  z-index: 1001;\n}\n@media screen and (max-width: 680px) {\n  #u-search {\n    padding: 0px;\n  }\n}\n@media screen and (prefers-color-scheme: dark) and (max-width: 500px) {\n  .l_header .m_search {\n    background: var(--color-site-bg) !important;\n  }\n}\n.cover-wrapper .cover-body .subtitle {\n  font-size: 0.875rem;\n}\n.fa.color-github,\n.fas.color-github,\n.far.color-github,\n.fad.color-github,\n.fal.color-github,\n.fa-solid.color-github,\n.fa-brands.color-github,\n.fa-regular.color-github,\n.fa-duotone.color-github,\n.fa-light.color-github,\n.fa-thin.color-github,\n.iziToast>.iziToast-body .iziToast-icon.color-github {\n  color: #000;\n}\n.fa.color-friends,\n.fas.color-friends,\n.far.color-friends,\n.fad.color-friends,\n.fal.color-friends,\n.fa-solid.color-friends,\n.fa-brands.color-friends,\n.fa-regular.color-friends,\n.fa-duotone.color-friends,\n.fa-light.color-friends,\n.fa-thin.color-friends,\n.iziToast>.iziToast-body .iziToast-icon.color-friends {\n  color: #d31ee9;\n}\n.fa.color-about,\n.fas.color-about,\n.far.color-about,\n.fad.color-about,\n.fal.color-about,\n.fa-solid.color-about,\n.fa-brands.color-about,\n.fa-regular.color-about,\n.fa-duotone.color-about,\n.fa-light.color-about,\n.fa-thin.color-about,\n.iziToast>.iziToast-body .iziToast-icon.color-about {\n  color: #0095ff;\n}\n.fa.color-travellings,\n.fas.color-travellings,\n.far.color-travellings,\n.fad.color-travellings,\n.fal.color-travellings,\n.fa-solid.color-travellings,\n.fa-brands.color-travellings,\n.fa-regular.color-travellings,\n.fa-duotone.color-travellings,\n.fa-light.color-travellings,\n.fa-thin.color-travellings,\n.iziToast>.iziToast-body .iziToast-icon.color-travellings {\n  color: #734ae6;\n}\nmjx-container {\n  padding: 0 0 !important;\n}\nmjx-container:not([display=\"true\"]) {\n  padding: 4px 2px 4px 6px !important;\n}\nmjx-container[jax=\"SVG\"] {\n  direction: ltr;\n}\nmjx-container[jax=\"SVG\"] > svg {\n  overflow: visible;\n}\nmjx-container[jax=\"SVG\"][display=\"true\"] {\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  text-align: center;\n  margin: 1em 0;\n}\nmjx-container[jax=\"SVG\"][justify=\"left\"] {\n  text-align: left;\n}\nmjx-container[jax=\"SVG\"][justify=\"right\"] {\n  text-align: right;\n}\ng[data-mml-node=\"merror\"] > g {\n  fill: #f00;\n  stroke: #f00;\n}\ng[data-mml-node=\"merror\"] > rect[data-background] {\n  fill: #ff0;\n  stroke: none;\n}\ng[data-mml-node=\"mtable\"] > line[data-line] {\n  stroke-width: 70px;\n  fill: none;\n}\ng[data-mml-node=\"mtable\"] > rect[data-frame] {\n  stroke-width: 70px;\n  fill: none;\n}\ng[data-mml-node=\"mtable\"] > .mjx-dashed {\n  stroke-dasharray: 140;\n}\ng[data-mml-node=\"mtable\"] > .mjx-dotted {\n  stroke-linecap: round;\n  stroke-dasharray: 0, 140;\n}\ng[data-mml-node=\"mtable\"] > svg {\n  overflow: visible;\n}\n[jax=\"SVG\"] mjx-tool {\n  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n  display: inline-block;\n  position: relative;\n  width: 0;\n  height: 0;\n}\n[jax=\"SVG\"] mjx-tool > mjx-tip {\n  position: absolute;\n  top: 0;\n  left: 0;\n}\nmjx-tool > mjx-tip {\n  display: -webkit-box /* OLD - iOS 6-, Safari 3.1-6 */;\n  display: -moz-box /* OLD - Firefox 19- (buggy but mostly works) */;\n  display: inline-block;\n  padding: 0.2em;\n  border: 1px solid #888;\n  font-size: 70%;\n  background-color: #f8f8f8;\n  color: #000;\n  box-shadow: 2px 2px 5px #aaa;\n  -webkit-box-shadow: 2px 2px 5px #aaa;\n}\ng[data-mml-node=\"maction\"][data-toggle] {\n  cursor: pointer;\n}\nmjx-status {\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  position: fixed;\n  left: 1em;\n  bottom: 1em;\n  min-width: 25%;\n  padding: 0.2em 0.4em;\n  border: 1px solid #888;\n  font-size: 90%;\n  background-color: #f8f8f8;\n  color: #000;\n}\nforeignObject[data-mjx-xml] {\n  font-family: initial;\n  line-height: normal;\n  overflow: visible;\n}\n.MathJax path {\n  stroke-width: 3;\n}\nmjx-container[display=\"true\"] {\n  overflow: auto hidden;\n}\nmjx-container[display=\"true\"] + br {\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"]}