@charset "utf-8";@font-face{font-family:Raleway_Medium;src:url("../fonts/raleway_medium/Raleway-Medium.eot");src:url("../fonts/raleway_medium/Raleway-Medium.eot?#iefix") format('embedded-opentype'),url("../fonts/raleway_medium/Raleway-Medium.woff") format('woff'),url("../fonts/raleway_medium/Raleway-Medium.ttf") format('truetype'),url("../fonts/raleway_medium/Raleway-Medium.svg#iconfont") format('svg');font-style:normal}.font-raleway-medium{font-family:Raleway-Medium}@font-face{font-family:feathericon;font-weight:400;font-style:normal;src:url("feathericon/feathericon.eot");src:url("feathericon/feathericon.eot?#iefix") format('embedded-opentype'),url("feathericon/feathericon.woff") format('woff'),url("feathericon/feathericon.ttf") format('truetype'),url("feathericon/feathericon.svg") format('svg')}.fe{display:inline-block;font:normal normal normal 16px feathericon;font-size:inherit;text-rendering:auto;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.fe-activity:before{content:"\f1e2"}.fe-add-cart:before{content:"\f1e6"}.fe-align-bottom:before{content:"\f1bf"}.fe-align-center:before{content:"\f195"}.fe-align-left:before{content:"\f196"}.fe-align-right:before{content:"\f197"}.fe-align-top:before{content:"\f1c0"}.fe-align-vertically:before{content:"\f1c1"}.fe-angry:before{content:"\f1b6"}.fe-app-menu:before{content:"\f198"}.fe-arrow-down:before{content:"\f100"}.fe-arrow-left:before{content:"\f101"}.fe-arrow-right:before{content:"\f102"}.fe-arrow-up:before{content:"\f103"}.fe-artboard:before{content:"\f104"}.fe-audio-player:before{content:"\f199"}.fe-backward:before{content:"\f180"}.fe-bar:before{content:"\f105"}.fe-bar-chart:before{content:"\f106"}.fe-beer:before{content:"\f107"}.fe-bell:before{content:"\f108"}.fe-birthday-cake:before{content:"\f163"}.fe-bold:before{content:"\f179"}.fe-bolt:before{content:"\f1e3"}.fe-book:before{content:"\f109"}.fe-bookmark:before{content:"\f170"}.fe-browser:before{content:"\f10b"}.fe-brush:before{content:"\f10c"}.fe-bug:before{content:"\f10d"}.fe-building:before{content:"\f10e"}.fe-cage:before{content:"\f1e7"}.fe-calendar:before{content:"\f10f"}.fe-camera:before{content:"\f110"}.fe-cart:before{content:"\f1e8"}.fe-check:before{content:"\f111"}.fe-check-circle:before{content:"\f19a"}.fe-check-circle-o:before{content:"\f19b"}.fe-check-verified:before{content:"\f19c"}.fe-clock:before{content:"\f113"}.fe-close:before{content:"\f114"}.fe-cloud:before{content:"\f115"}.fe-cocktail:before{content:"\f116"}.fe-code:before{content:"\f117"}.fe-codepen:before{content:"\f1d3"}.fe-coffee:before{content:"\f166"}.fe-columns:before{content:"\f118"}.fe-comment:before{content:"\f119"}.fe-comment-o:before{content:"\f1d2"}.fe-commenting:before{content:"\f11a"}.fe-comments:before{content:"\f11b"}.fe-compress:before{content:"\f181"}.fe-credit-card:before{content:"\f1e9"}.fe-crop:before{content:"\f1c2"}.fe-cry:before{content:"\f1b7"}.fe-cutlery:before{content:"\f19d"}.fe-delete-link:before{content:"\f19e"}.fe-desktop:before{content:"\f11d"}.fe-diamond:before{content:"\f11e"}.fe-difference:before{content:"\f1c3"}.fe-disabled:before{content:"\f11f"}.fe-disappointed:before{content:"\f1b8"}.fe-distribute-horizontally:before{content:"\f1cf"}.fe-distribute-vertically:before{content:"\f1c5"}.fe-document:before{content:"\f19f"}.fe-download:before{content:"\f120"}.fe-drop-down:before{content:"\f121"}.fe-drop-left:before{content:"\f122"}.fe-drop-right:before{content:"\f123"}.fe-drop-up:before{content:"\f124"}.fe-edit:before{content:"\f17f"}.fe-eject:before{content:"\f182"}.fe-elipsis-h:before{content:"\f125"}.fe-elipsis-v:before{content:"\f126"}.fe-equalizer:before{content:"\f1a0"}.fe-eraser:before{content:"\f1c6"}.fe-expand:before{content:"\f183"}.fe-export:before{content:"\f16e"}.fe-eye:before{content:"\f127"}.fe-facebook:before{content:"\f1d4"}.fe-fast-backward:before{content:"\f184"}.fe-fast-forward:before{content:"\f185"}.fe-feather:before{content:"\f174"}.fe-feed:before{content:"\f128"}.fe-file:before{content:"\f1b1"}.fe-file-audio:before{content:"\f1b2"}.fe-file-excel:before{content:"\f1a2"}.fe-file-image:before{content:"\f1b3"}.fe-file-movie:before{content:"\f1b4"}.fe-file-powerpoint:before{content:"\f1a3"}.fe-file-word:before{content:"\f1a4"}.fe-file-zip:before{content:"\f1b5"}.fe-filter:before{content:"\f173"}.fe-flag:before{content:"\f129"}.fe-folder:before{content:"\f12a"}.fe-folder-open:before{content:"\f176"}.fe-fork:before{content:"\f12b"}.fe-forward:before{content:"\f186"}.fe-frowing:before{content:"\f1b9"}.fe-gamepad:before{content:"\f191"}.fe-gear:before{content:"\f1a5"}.fe-gift:before{content:"\f1ea"}.fe-git:before{content:"\f1d5"}.fe-github:before{content:"\f1d6"}.fe-github-alt:before{content:"\f1d7"}.fe-globe:before{content:"\f12c"}.fe-google:before{content:"\f1d8"}.fe-google-plus:before{content:"\f1d9"}.fe-hash:before{content:"\f12d"}.fe-headphone:before{content:"\f18e"}.fe-heart:before{content:"\f12e"}.fe-heart-o:before{content:"\f167"}.fe-home:before{content:"\f12f"}.fe-import:before{content:"\f16f"}.fe-info:before{content:"\f130"}.fe-insert-link:before{content:"\f1a6"}.fe-instagram:before{content:"\f1da"}.fe-intersect:before{content:"\f1c7"}.fe-italic:before{content:"\f17a"}.fe-key:before{content:"\f131"}.fe-keyboard:before{content:"\f132"}.fe-kitchen-cooker:before{content:"\f1a7"}.fe-laptop:before{content:"\f133"}.fe-layer:before{content:"\f18c"}.fe-layout:before{content:"\f134"}.fe-line-chart:before{content:"\f135"}.fe-link:before{content:"\f136"}.fe-link-external:before{content:"\f137"}.fe-list-bullet:before{content:"\f17c"}.fe-list-order:before{content:"\f17d"}.fe-list-task:before{content:"\f17e"}.fe-location:before{content:"\f138"}.fe-lock:before{content:"\f139"}.fe-login:before{content:"\f13a"}.fe-logout:before{content:"\f13b"}.fe-loop:before{content:"\f192"}.fe-magic:before{content:"\f177"}.fe-mail:before{content:"\f13c"}.fe-map:before{content:"\f16d"}.fe-mask:before{content:"\f1c8"}.fe-medal:before{content:"\f13d"}.fe-megaphone:before{content:"\f13e"}.fe-mention:before{content:"\f164"}.fe-messanger:before{content:"\f1e1"}.fe-minus:before{content:"\f140"}.fe-mobile:before{content:"\f141"}.fe-money:before{content:"\f1a8"}.fe-moon:before{content:"\f1ef"}.fe-mouse:before{content:"\f142"}.fe-music:before{content:"\f175"}.fe-open-mouth:before{content:"\f1ba"}.fe-palette:before{content:"\f165"}.fe-paper-plane:before{content:"\f178"}.fe-pause:before{content:"\f187"}.fe-pencil:before{content:"\f144"}.fe-phone:before{content:"\f145"}.fe-picture:before{content:"\f1a9"}.fe-picture-square:before{content:"\f1e4"}.fe-pie-chart:before{content:"\f146"}.fe-pinterest:before{content:"\f1db"}.fe-pizza:before{content:"\f147"}.fe-play:before{content:"\f188"}.fe-plug:before{content:"\f18f"}.fe-plus:before{content:"\f148"}.fe-pocket:before{content:"\f1dc"}.fe-pot:before{content:"\f1aa"}.fe-print:before{content:"\f171"}.fe-prototype:before{content:"\f149"}.fe-question:before{content:"\f14a"}.fe-quote-left:before{content:"\f14b"}.fe-quote-right:before{content:"\f14c"}.fe-rage:before{content:"\f1bb"}.fe-random:before{content:"\f189"}.fe-reload:before{content:"\f193"}.fe-remove-cart:before{content:"\f1eb"}.fe-rocket:before{content:"\f14d"}.fe-scale:before{content:"\f1c9"}.fe-search:before{content:"\f14e"}.fe-search-minus:before{content:"\f16a"}.fe-search-plus:before{content:"\f16b"}.fe-share:before{content:"\f14f"}.fe-shield:before{content:"\f172"}.fe-shopping-bag:before{content:"\f1ec"}.fe-sitemap:before{content:"\f150"}.fe-smile:before{content:"\f1bc"}.fe-smile-alt:before{content:"\f1bd"}.fe-speaker:before{content:"\f1ab"}.fe-star:before{content:"\f151"}.fe-star-o:before{content:"\f168"}.fe-step-backward:before{content:"\f1d0"}.fe-step-forward:before{content:"\f1d1"}.fe-stop:before{content:"\f18b"}.fe-subtract:before{content:"\f1ca"}.fe-sunny-o:before{content:"\f1f0"}.fe-sunrise:before{content:"\f1f1"}.fe-sync:before{content:"\f194"}.fe-table:before{content:"\f1ac"}.fe-tablet:before{content:"\f152"}.fe-tag:before{content:"\f153"}.fe-target:before{content:"\f1f3"}.fe-terminal:before{content:"\f154"}.fe-text-align-center:before{content:"\f1cb"}.fe-text-align-justify:before{content:"\f1e5"}.fe-text-align-left:before{content:"\f1cc"}.fe-text-align-right:before{content:"\f1cd"}.fe-text-size:before{content:"\f17b"}.fe-ticket:before{content:"\f155"}.fe-tiled:before{content:"\f156"}.fe-timeline:before{content:"\f1ad"}.fe-tired:before{content:"\f1be"}.fe-trash:before{content:"\f157"}.fe-trophy:before{content:"\f158"}.fe-truck:before{content:"\f1ed"}.fe-twitter:before{content:"\f1dd"}.fe-umbrella:before{content:"\f1f2"}.fe-underline:before{content:"\f1ae"}.fe-union:before{content:"\f1ce"}.fe-unlock:before{content:"\f169"}.fe-upload:before{content:"\f159"}.fe-usb:before{content:"\f190"}.fe-user:before{content:"\f15a"}.fe-user-minus:before{content:"\f16c"}.fe-user-plus:before{content:"\f15b"}.fe-users:before{content:"\f15c"}.fe-vector:before{content:"\f15d"}.fe-video:before{content:"\f15e"}.fe-wallet:before{content:"\f1ee"}.fe-warning:before{content:"\f15f"}.fe-watch:before{content:"\f1af"}.fe-watch-alt:before{content:"\f1b0"}.fe-wine-glass:before{content:"\f161"}.fe-wordpress:before{content:"\f1de"}.fe-wordpress-alt:before{content:"\f1df"}.fe-wrench:before{content:"\f162"}.fe-youtube:before{content:"\f1e0"}html{line-height:1.15;-webkit-text-size-adjust:100%}body{margin:0}h1{font-size:2em;margin:.67em 0}hr{box-sizing:content-box;height:0;overflow:visible}pre{font-family:monospace,monospace;font-size:1em}a{background-color:transparent}abbr[title]{border-bottom:none;text-decoration:underline;text-decoration:underline dotted}b,strong{font-weight:bolder}code,kbd,samp{font-family:monospace,monospace;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}img{border-style:none}button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,input{overflow:visible}button,select{text-transform:none}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type=button]-moz-focusring,[type=reset]-moz-focusring,[type=submit]-moz-focusring,button:-moz-focusring{outline:1px dotted ButtonText}fieldset{padding:.35em .75em .625em}legend{box-sizing:border-box;color:inherit;display:table;max-width:100%;padding:0;white-space:normal}progress{vertical-align:baseline}textarea{overflow:auto}[type=checkbox],[type=radio]{box-sizing:border-box;padding:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}details{display:block}summary{display:list-item}template{display:none}[hidden]{display:none}*,::after,::before{box-sizing:border-box}body,html{height:100%}html{font-size:62.5%;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%;-ms-overflow-style:scrollbar;-webkit-tap-highlight-color:transparent}body{position:relative;background-color:#fff;font-family:"Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;font-size:1.5rem;line-height:1.7;color:#1e3e3f;padding:0;margin:0;overflow-x:hidden;text-size-adjust:100%}body ::selection{background:#5c6b72;color:#e6e6e6}a{color:#127ea9}a:hover{color:#1594c6}a:active{color:#1178a1}a.disabled{color:#adb5bd}img{max-width:100%}.article-category .article-category-link,.article-date{text-decoration:none;color:#5c6b72}.article-category .article-category-link:hover,.article-date:hover{color:#5c6b72}.archives h1,.archives h2,.archives h3,.archives h4,.archives h5,.archives h6,.article-entry h1,.article-entry h2,.article-entry h3,.article-entry h4,.article-entry h5,.article-entry h6{margin:1.5rem 0}.archives hr,.article-entry hr{height:.1rem;background-color:#e6e6e6;border:none;padding:0;margin:1.5rem 0}.archives strong,.article-entry strong{font-weight:700}.archives cite,.archives em,.article-entry cite,.article-entry em{font-style:italic}.archives sub,.archives sup,.article-entry sub,.article-entry sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}.archives sup,.article-entry sup{top:-.5rem}.archives sub,.article-entry sub{bottom:-.25rem}.archives small,.article-entry small{font-size:85%}.archives mark,.article-entry mark{background-color:rgba(255,255,0,.25)}.archives abbr,.archives acronym,.article-entry abbr,.article-entry acronym{border-bottom:.1rem #e6e6e6 dotted}.archives dl,.archives ol,.archives ul,.article-entry dl,.article-entry ol,.article-entry ul{margin:1.5rem 0;line-height:line-height}.archives ol,.archives ul,.article-entry ol,.article-entry ul{padding-left:2em}.archives ul,.article-entry ul{list-style-type:circle}.archives blockquote,.archives p,.archives table,.article-entry blockquote,.article-entry p,.article-entry table{margin:1.5rem 0}.archives img,.archives video,.article-entry img,.article-entry video{max-width:100%;height:auto;display:block;margin:auto}.archives iframe,.article-entry iframe{border:none}.archives table,.article-entry table{width:100%;border-collapse:collapse;vertical-align:middle;empty-cells:show;text-align:left}.archives table,.archives table td,.archives table th,.article-entry table,.article-entry table td,.article-entry table th{border:.1rem #e6e6e6 solid}.archives table td,.archives table th,.article-entry table td,.article-entry table th{padding:1rem 1.5rem}.archives table tbody tr:nth-child(2n),.article-entry table tbody tr:nth-child(2n){background-color:rgba(230,230,230,.25)}.archives blockquote,.article-entry blockquote{position:relative;display:block;padding:0 1.5rem 0 3.5rem;width:100%;overflow:auto;color:#5c6b72;background-image:url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgc3R5bGU9ImVuYWJsZS1iYWNrZ3JvdW5kOm5ldyAwIDAgMjQgMjQiIHhtbDpzcGFjZT0icHJlc2VydmUiPjxwYXRoIGNsYXNzPSJzdDAiIGQ9Ik0xMCAySDQuMWMtLjQgMC0uNy4zLS43LjdMMiAyMS4yYzAgLjQuMy44LjguOGgxLjZjLjMgMCAuNi0uMi43LS41TDEwLjcgM2MuMS0uNS0uMi0xLS43LTF6TTIxLjIgMmgtNS44Yy0uNCAwLS43LjMtLjguN2wtMS40IDE4LjVjMCAuNC4zLjguOC44aDEuNmMuMyAwIC42LS4yLjctLjVMMjIgM2MuMS0uNS0uMi0xLS44LTF6IiBmaWxsPSIjQURCNUJEIi8+PC9zdmc+");background-size:3rem;background-repeat:no-repeat;background-position:0 0}.archives blockquote>:first-child,.article-entry blockquote>:first-child{margin-top:0}.archives blockquote>:last-child,.article-entry blockquote>:last-child{margin-bottom:0}.archives blockquote footer cite:before,.article-entry blockquote footer cite:before{content:"—";padding:0 .5rem}.jumbotron{padding:0;margin-bottom:3rem;text-align:center}.content,.sidebar{transition:all .3s ease-in-out}.content{position:relative;z-index:1;margin-right:0}.content.on{transform:translateX(-10rem)}.sidebar{position:fixed;z-index:9;top:0;right:-10rem;bottom:0;width:10rem;background-color:#f4f4f4}.sidebar.on{right:0}.navbar-toggle{position:absolute;top:1.5rem;right:11.5rem;padding:.5rem 1rem;border:none;-webkit-border-radius:0.4rem;-moz-border-radius:.4rem;border-radius:.4rem;background-color:rgba(30,62,63,.25);color:#fff}.navbar-toggle::before{content:'\f105';font-family:feathericon;font-size:larger}.outer,.wrap{width:100%;padding-right:1.5rem;padding-left:1.5rem;margin:auto}.outer::after,.outer::before,.wrap::after,.wrap::before{content:"";display:table;clear:both}.local-search{width:100%}.tocbot{display:none}@media (min-width:768px){.jumbotron{margin-bottom:6rem}.outer,.wrap{width:70rem}.content{margin-right:10rem}.sidebar{right:0;background-color:#fff}.navbar-toggle{display:none}.local-search{width:70rem}.card-quote{grid-template-columns:repeat(3,1fr)}.archive-article-title{margin:0;font-size:1.25em!important}}@media (min-width:992px){.outer,.wrap{padding-right:0;padding-left:0}}@media (min-width:1200px){.tocbot{display:block}}.list-inline,.list-unstyled{list-style:none;padding-left:0;margin-left:0}.list-inline{position:relative;margin:0 -.75rem}.list-inline>li{display:inline-block;padding:0 .75rem}.category-list{list-style:none;padding-left:0;margin-left:0;margin-right:-.5rem;margin-left:-.5rem;display:flex;flex-direction:column}.category-list>.category-list-item{display:inline-block;padding:.5rem 1rem}.category-list>.category-list-item:before{content:"\f18c";font-family:feathericon;margin-right:.5rem}.tag-list{list-style:none;padding-left:0;margin-left:0;margin-right:-.5rem;margin-left:-.5rem}.tag-list>.tag-list-item{display:inline-block;padding:.5rem 1rem}.tag-list>.tag-list-item:before{content:"\f153";font-family:feathericon;margin-right:.5rem}.tooltip{position:relative}.tooltip::after{content:attr(data-tooltip);position:absolute;z-index:9;bottom:100%;left:50%;background-color:#172d3e;-webkit-border-radius:0.4rem;-moz-border-radius:.4rem;border-radius:.4rem;padding:1rem;opacity:0;pointer-events:none;transform:translate(-50%,0);transition:all .3s ease-in-out;color:#e6e6e6;white-space:nowrap}.tooltip:hover::after{opacity:1;transform:translate(-50%,0)}.video{position:relative;height:auto}.video .brand{width:4.2rem}.video-frame{position:absolute;z-index:1;right:0;bottom:0;left:0;min-width:100%}.video-frame img{display:block;width:100%}.video-media{position:relative;z-index:0;height:90vh;overflow:hidden}.video-media img,.video-media video{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);min-width:100%;min-height:100%}.video-overlay{position:absolute;top:0;bottom:0;left:0;right:0;background-color:rgba(178,191,204,.6)}.video-inner{position:absolute;top:50%;left:50%;transform:translate(-50%,-65%)}.video-inner,.video-inner a{color:#fff;text-decoration:none}.video-learn-more{position:absolute;z-index:1;bottom:-3rem;right:0;left:0}.video-learn-more a>.fe{font-size:3rem;color:#adb5bd}.video-learn-more a>.fe:hover{color:#1e3e3f}.search-form-wrap{position:fixed;top:-100%;right:10rem;left:0;opacity:0;transition:.3s}.search-form-wrap.on{top:0;opacity:1}.local-search{position:relative;margin:0 auto;padding:3rem;background-color:#fff;box-shadow:0 1rem 3rem rgba(30,62,63,.05);max-height:100vh;overflow-y:auto}.local-search-input{border:.1rem #e6e6e6 solid;-webkit-border-radius:0.4rem;-moz-border-radius:.4rem;border-radius:.4rem;background-color:#fff;width:100%;padding:1rem 1.5rem;outline:0}.local-search-input::-webkit-search-cancel-button,.local-search-input::-webkit-search-results-decoration{-webkit-appearance:none}.local-search-close{position:absolute;top:3.85rem;right:4.25rem;display:block;height:2rem;width:2rem;padding:0;border:none;-webkit-border-radius:50%;-moz-border-radius:50%;border-radius:50%;background-color:#9c8079;color:#fff;text-align:center;cursor:pointer}.local-search-close::before{content:'\f114';font-family:feathericon}.local-search-result{text-align:left}.search-result-list{list-style:none;padding-left:0;margin-left:0}.search-result-list li{padding:1.5rem 0}.search-result-list li:not(:last-child){border-bottom:.1rem #e6e6e6 solid}.search-result-list li .search-result-title{font-size:1.6rem;font-weight:700}.search-result-list li .search-result{padding-top:.5rem;margin:0;max-height:12rem;overflow:hidden}.search-result-list li em.search-keyword{color:#9e6a4d}.search-result-empty{padding:3rem 0 0}.page-type-title{margin:0;padding:3rem 0}.page-nav{margin:3rem auto;text-align:center;overflow:hidden}.page-nav::after,.page-nav::before{content:"";display:table;clear:both}.page-nav a,.page-nav span{padding:1rem 1.5rem;line-height:1}.page-nav a{text-decoration:none}.page-nav .prev{float:left}.page-nav .next{float:right}.page-nav .page-number{display:inline-block}@media mq-mobile{.page-nav .page-number{display:none}}.page-nav .current{font-weight:700}.page-nav .space{color:#e6e6e6}.article{padding:3rem 0}.article-topping{position:absolute;top:0;left:-3rem;color:#ea434a}.article-topping .fe{font-size:2rem;line-height:1.7}.article-meta::after,.article-meta::before{content:"";display:table;clear:both}.article-date::before{content:'\f10f';margin-right:.5rem;font-family:feathericon;opacity:.5}.article-category{display:inline-block;margin-left:1.5rem}.article-category:before{content:"\f18c";font-family:feathericon;margin-right:.5rem}.archive-article-header+.article-category{margin-left:0}.article-entry{margin-top:3rem;color:#1e3e3f}.article-entry::after,.article-entry::before{content:"";display:table;clear:both}.article-entry .pullquote{text-align:left;width:45%;margin:0}.article-entry .pullquote.left{margin-left:.5em;margin-right:1em}.article-entry .pullquote.right{margin-right:.5em;margin-left:1em}.article-entry .caption{color:color-grey;display:block;font-size:.9em;margin-top:.5em;position:relative;text-align:center}.article-entry .video-container{position:relative;padding-top:56.25%;height:0;overflow:hidden}.article-entry .video-container embed,.article-entry .video-container iframe,.article-entry .video-container object{position:absolute;top:0;left:0;width:100%;height:100%;margin-top:0}.article-header{position:relative}.article-header h1,.article-header h2{margin:0}.article-header .article-title a{text-decoration:none;color:#1e3e3f}.article-footer{margin-top:3rem}.article-footer::after,.article-footer::before{content:"";display:table;clear:both}.article-tag-list{list-style:none;padding-left:0;margin-left:0;margin:0}.article-tag-list:before{content:"\f153";font-family:feathericon;margin-right:.5rem}.article-tag-list .article-tag-list-item{display:inline-block;padding-right:1rem}.article-tag-list .article-tag-list-link{text-decoration:none}.article-comment-link{float:right}.article-comment-link:before{content:"\f1d2";font-family:feathericon;padding-right:8px}.article-share-link{cursor:pointer;float:right;margin-left:20px}.article-share-link:before{content:"\f14f";font-family:feathericon;padding-right:6px}.article-nav{position:relative;padding-top:3rem;margin-top:5rem;border-top:.1rem #e6e6e6 solid}.article-nav::after,.article-nav::before{content:"";display:table;clear:both}.article-nav-link{display:block;text-decoration:none}.article-nav-link:first-child{float:left}.article-nav-link:last-child{float:right;text-align:right}.article-nav-caption{color:#5c6b72}.article-nav-title{font-size:inherit}.article-share-box{position:absolute;display:none;background:#fff;-webkit-border-radius:0.4rem;-moz-border-radius:.4rem;border-radius:.4rem;box-shadow:1px 2px 10px rgba(0,0,0,.2);-webkit-border-radius:3px;-moz-border-radius:3px;border-radius:3px;margin-left:-145px;overflow:hidden;z-index:1}.article-share-box.on{display:block}.article-share-input{width:100%;background:0 0;box-sizing:border-box;padding:0 1.5rem;outline:0;border:none;border-bottom:.1rem #e6e6e6 solid;height:3.6rem;line-height:3.6rem}.article-share-links::after,.article-share-links::before{content:"";display:table;clear:both}.article-share-facebook,.article-share-google,.article-share-pinterest,.article-share-twitter{position:relative;display:block;float:left;width:5rem;height:3.6rem;color:#172d3e;text-align:center;text-decoration:none}.article-share-facebook:before,.article-share-google:before,.article-share-pinterest:before,.article-share-twitter:before{font-size:20px;font-family:feathericon}.article-share-facebook:hover,.article-share-google:hover,.article-share-pinterest:hover,.article-share-twitter:hover{color:#fff}.article-share-twitter:before{content:"\f1dd"}.article-share-twitter:hover{background:#00aced;text-shadow:0 1px #008abe}.article-share-facebook:before{content:"\f1d4"}.article-share-facebook:hover{background:#3b5998;text-shadow:0 1px #2f477a}.article-share-pinterest:before{content:"\f1db"}.article-share-pinterest:hover{background:#cb2027;text-shadow:0 1px #a21a1f}.article-share-google:before{content:"\f1d8"}.article-share-google:hover{background:#dd4b39;text-shadow:0 1px #be3221}.tocbot{position:absolute;top:14rem;left:calc((100vw - 70rem)/ 2 + 70rem);font-size:80%;opacity:.8}.tocbot>.toc-list{position:relative;overflow:hidden}.toc-list{list-style:none;padding-left:0;margin-left:0;padding-left:1rem}a.toc-link{height:100%;color:#172d3e;text-decoration:none}.is-collapsible{max-height:1000px;overflow:hidden;transition:all}.is-collapsed{max-height:0}.is-position-fixed{position:fixed!important;top:0;right:10rem}.is-active-link{font-weight:700}.toc-link::before{background-color:#e6e6e6;content:' ';display:inline-block;height:inherit;left:0;margin-top:-1px;position:absolute;width:2px}.is-active-link::before{background-color:#127ea9}.article-gallery{position:relative}.article-gallery-photos{position:relative;overflow:hidden}.article-gallery-img{display:none;max-width:100%}.article-gallery-img:first-child{display:block}.article-gallery-img.loaded{position:absolute;display:block}.article-gallery-img img{display:block;max-width:100%;margin:0 auto}.article-albums{position:relative}.article-albums-photos{position:relative;display:flex;flex-wrap:wrap;list-style:none;padding-left:0;margin-left:0}.article-albums-photos::after,.article-albums-photos::before{content:"";display:table;clear:both}.article-albums-photos::after{content:'';flex-grow:999999999}.article-albums-photos .article-albums-item{position:relative;flex-grow:1;margin:.5rem;overflow:hidden}.article-albums-photos .article-albums-item img{object-fit:cover;max-width:100%;min-width:100%;vertical-align:center}.article-albums-photos .article-albums-item .article-albums-caption{display:block;width:100%;padding:1rem 0;text-align:center}@media (min-width:576px){.article-albums-item img{height:32rem}.article-albums-item .article-albums-caption{position:absolute;bottom:0;left:0;width:100%;background-color:rgba(0,0,0,.5);background:linear-gradient(to top,rgba(0,0,0,.5),transparent);color:#fff;padding:1rem;opacity:0;transform:translateY(100%);transition:all .3s ease-in-out}.article-albums-item:hover .article-albums-caption{opacity:1;transform:translateY(0)}}@media (min-width:768px){.article-albums-item img{height:20rem}}.justified-gallery{width:100%;position:relative;overflow:hidden}.justified-gallery>a,.justified-gallery>div,.justified-gallery>figure{position:absolute;display:inline-block;overflow:hidden;background:#adb5bd;filter:"alpha(opacity=10)";opacity:.1;margin:0;padding:0}.justified-gallery>a>a>img,.justified-gallery>a>a>svg,.justified-gallery>a>img,.justified-gallery>a>svg,.justified-gallery>div>a>img,.justified-gallery>div>a>svg,.justified-gallery>div>img,.justified-gallery>div>svg,.justified-gallery>figure>a>img,.justified-gallery>figure>a>svg,.justified-gallery>figure>img,.justified-gallery>figure>svg{position:absolute;top:50%;left:50%;margin:0;padding:0;border:none;filter:"alpha(opacity=0)";opacity:0}.justified-gallery>a>.caption,.justified-gallery>div>.caption,.justified-gallery>figure>.caption{display:none;position:absolute;right:0;bottom:0;left:0;padding:1rem;background-color:rgba(0,0,0,.5);background:linear-gradient(to top,rgba(0,0,0,.5),transparent);color:#fff}.justified-gallery>a>.caption.caption-visible,.justified-gallery>div>.caption.caption-visible,.justified-gallery>figure>.caption.caption-visible{display:initial}.justified-gallery>.jg-entry-visible{filter:"alpha(opacity=100)";opacity:1;background:0 0}.justified-gallery>.jg-entry-visible>a>img,.justified-gallery>.jg-entry-visible>a>svg,.justified-gallery>.jg-entry-visible>img,.justified-gallery>.jg-entry-visible>svg{filter:"alpha(opacity=100)";opacity:1;-webkit-transition:opacity .5s ease-in;-moz-transition:opacity .5s ease-in;-o-transition:opacity .5s ease-in;transition:opacity}.justified-gallery>.jg-filtered{display:none}.justified-gallery>.jg-filtered>.spinner{position:absolute;bottom:0;margin-left:-24px;padding:10px 0 10px 0;left:50%;filter:"alpha(opacity=100)";opacity:1;overflow:initial}.justified-gallery>.jg-filtered>span{display:inline-block;filter:"alpha(opacity=0)";opacity:0;width:8px;height:8px;margin:0 4px 0 4px;background-color:#000;-webkit-border-radius:6px;-moz-border-radius:6px;border-radius:6px}.macbook{position:relative}.macbook .macbook-screen{position:relative;background-color:transparent;border-style:solid;border-color:#fff;-webkit-border-radius:1rem;-moz-border-radius:1rem;border-radius:1rem;border-width:1.25rem;box-shadow:0 1rem 3rem rgba(0,0,0,.15),0 0 .5rem rgba(0,0,0,.15) inset}.macbook .macbook-keyboard{display:none;position:relative;box-sizing:content-box;background-color:#fff;border-bottom:solid .75rem #f2f2f2;border-bottom-left-radius:50%;border-bottom-right-radius:50%;margin:-.5rem -5rem 0;height:.5rem;box-shadow:0 .5rem 3rem rgba(0,0,0,.15)}.macbook .macbook-keyboard::before{content:'';position:absolute;left:50%;transform:translateX(-50%);background:linear-gradient(90deg,#f2f2f2,#fff,#f2f2f2);box-shadow:0 0 .1rem rgba(0,0,0,.05) inset;width:20%;height:.3rem;-webkit-border-radius:0.125rem;-moz-border-radius:.125rem;border-radius:.125rem}@media (min-width:768px){.macbook .macbook-screen{border-width:2rem 1.25rem 1.25rem}.macbook .macbook-keyboard{display:block}}.macbook-wrap{padding:1rem 9rem}.scrolling-wrap{min-height:30rem;overflow:hidden}.scrolling{position:absolute;top:30rem;width:100%;animation:scrolling-animation 10s ease-in-out 1s infinite}.safari{background-color:#e6e6e6;-webkit-border-radius:border-radius;-moz-border-radius:border-radius;border-radius:border-radius}.safari,.safari .safari-body,.safari .safari-header{position:relative;overflow:hidden}.safari-example{height:36rem;padding:0;margin:0;background-repeat:no-repeat;background-size:cover;background-position:top left}.safari-btns{position:relative;background-color:#eb6b60}.safari-btns,.safari-btns:after,.safari-btns:before{display:inline-block;width:1rem;height:1rem;-webkit-border-radius:1rem;-moz-border-radius:1rem;border-radius:1rem}.safari-btns:after,.safari-btns:before{content:'';position:absolute}.safari-btns:before{left:1.5rem;background-color:#f4be4f}.safari-btns:after{left:3rem;background-color:#66c655}@-moz-keyframes scrolling-animation{0%{top:0}10%{top:0;transform:translateY(0)}30%{transform:translateY(-35%)}60%{transform:translateY(-75%)}90%{transform:translateY(-100%)}100%{transform:translateY(-100%)}}@-webkit-keyframes scrolling-animation{0%{top:0}10%{top:0;transform:translateY(0)}30%{transform:translateY(-35%)}60%{transform:translateY(-75%)}90%{transform:translateY(-100%)}100%{transform:translateY(-100%)}}@-o-keyframes scrolling-animation{0%{top:0}10%{top:0;transform:translateY(0)}30%{transform:translateY(-35%)}60%{transform:translateY(-75%)}90%{transform:translateY(-100%)}100%{transform:translateY(-100%)}}@keyframes scrolling-animation{0%{top:0}10%{top:0;transform:translateY(0)}30%{transform:translateY(-35%)}60%{transform:translateY(-75%)}90%{transform:translateY(-100%)}100%{transform:translateY(-100%)}}.card-quote{display:grid;grid-gap:1.5rem;margin-bottom:1.5rem}.card-quote blockquote{position:relative;margin:0;padding:1.5rem;padding-left:6rem;overflow:auto;border-left:none;border:.1rem #e6e6e6 solid;background:0 0;-webkit-border-radius:0.4rem;-moz-border-radius:.4rem;border-radius:.4rem;transition:all .3s ease-in-out;line-height:1.4}.card-quote blockquote:before{content:none}.card-quote blockquote p:first-child{position:absolute;top:50%;left:1.5rem;transform:translateY(-50%)}.card-quote blockquote p:first-child img{height:3.2rem;width:3.2rem}.card-quote blockquote h3,.card-quote blockquote h4,.card-quote blockquote h5{margin:0}.card-quote blockquote h3+p,.card-quote blockquote h4+p,.card-quote blockquote h5+p{margin-top:0;color:#adb5bd;font-size:small}.card-quote blockquote a{opacity:0;display:flex;justify-content:center;align-items:center;position:absolute;z-index:1;top:0;right:0;bottom:0;left:0;text-align:center;background:rgba(255,255,255,.75);color:#172d3e;text-decoration:none;font-size:small;transition:all .3s ease-in-out}.card-quote blockquote:hover{transform:translateY(-.25rem);box-shadow:0 1rem 3rem .01rem rgba(23,45,62,.1);border-color:#f4f4f4}.tenses img{margin:1rem 0}.example{color:#00008b}.columns{display:grid;grid-gap:1.5rem;margin-bottom:1.5rem}@media (min-width:768px){.columns{grid-template-columns:repeat(2,1fr)}}.articles .article{padding:4.5rem 0}.articles .article:not(:last-child){border-bottom:.1rem #e6e6e6 solid}.articles .article-entry,.articles .article-footer{margin-top:0}.articles .article-entry .article-gallery{margin-top:1.5rem}.archives-wrap{position:relative}.archive-year-wrap{position:relative;padding-top:1rem}.archive-year-wrap::after{content:'';position:absolute;bottom:1rem;right:0;left:6rem;height:.1rem;background-color:#adb5bd}.archive-year-wrap .archive-year{display:inline-block;text-decoration:none;color:#172d3e;font-size:1.5em}.archive-article{padding:2rem 0;display:flex}.archive-article:not(:last-child){border-bottom:.1rem #e6e6e6 dashed}.archive-article-gallery{flex-shrink:0;width:38.2%;margin-right:1.5rem}.archive-article-header a{text-decoration:none}.archive-article-header .archive-article-title{margin:0;font-size:1.1em}.archive-article-header .archive-article-date{color:#5c6b72}.archive-article-footer{margin-top:1.5rem}.archive-article-inner .article-tag-list{padding:0;margin:0}.footer{border-top:.1rem #e6e6e6 solid;padding:3rem 0}.float-left{float:left!important}.float-right{float:right!important}.float-none{float:none!important}.article-entry .highlight,.article-entry pre{background:#f6f8fa;padding:1.5rem;margin:1.5rem 0;-webkit-border-radius:0.4rem;-moz-border-radius:.4rem;border-radius:.4rem;overflow:auto;color:#4d4d4c}.article-entry .gist .gist-file .gist-data .line-numbers,.article-entry .highlight .gutter pre{color:#8e908c}.article-entry code,.article-entry pre{font-family:inherit;text-shadow:none}.article-entry code{background:#f6f8fa;padding:.25rem;-webkit-border-radius:0.4rem;-moz-border-radius:.4rem;border-radius:.4rem}.article-entry pre code{background:0 0;padding:0}.article-entry .highlight pre{border:none;margin:0;padding:0}.article-entry .highlight table{margin:0;width:auto;border:none}.article-entry .highlight td{border:none;padding:0}.article-entry .highlight figcaption{font-size:85%;color:#8e908c;line-height:1rem;margin-bottom:1rem}.article-entry .highlight figcaption::after,.article-entry .highlight figcaption::before{content:"";display:table;clear:both}.article-entry .highlight figcaption a{float:right}.article-entry .highlight .gutter{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.article-entry .highlight .gutter pre{text-align:right;padding-right:1.5rem}.article-entry .highlight .line{height:inherit}.article-entry .highlight .line.marked{background:#d6d6d6}.article-entry .gist{background:#f6f8fa}.article-entry .gist .gist-file{border:none;margin:0}.article-entry .gist .gist-file .gist-data{background:0 0;border:none}.article-entry .gist .gist-file .gist-data .line-numbers{background:0 0;border:none}.article-entry .gist .gist-file .gist-data .line-data{padding:0!important}.article-entry .gist .gist-file .highlight{margin:0;padding:0;border:none}.article-entry .gist .gist-file .gist-meta{background:#f6f8fa;color:#8e908c;padding:0;margin-top:1rem}.article-entry .gist .gist-file .gist-meta a{font-weight:400}.article-entry .gist .gist-file .gist-meta a:hover{text-decoration:underline}pre .comment,pre .title{color:#8e908c}pre .attribute,pre .css .class,pre .css .id,pre .css .pseudo,pre .html .doctype,pre .regexp,pre .ruby .constant,pre .tag,pre .variable,pre .xml .doctype,pre .xml .pi,pre .xml .tag .title{color:#f2777a}pre .built_in,pre .constant,pre .literal,pre .number,pre .params,pre .preprocessor{color:#f99157}pre .class,pre .css .rules .attribute,pre .ruby .class .title{color:#9c9}pre .header,pre .inheritance,pre .ruby .symbol,pre .string,pre .value,pre .xml .cdata{color:#9c9}pre .css .hexcolor{color:#6cc}pre .coffeescript .title,pre .function,pre .javascript .title,pre .perl .sub,pre .python .decorator,pre .python .title,pre .ruby .function .title,pre .ruby .title .keyword{color:#69c}pre .javascript .function,pre .keyword{color:#c9c}.pace{-webkit-pointer-events:none;pointer-events:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.pace .pace-progress{position:fixed;z-index:2000;top:0;right:100%;width:100%;height:.2rem;background-color:#127ea9}.pace-inactive{display:none}.gitalk,.markdown-body{font-size:1.5rem!important}.gt-container .gt-avatar.gt-comment-avatar img{-webkit-border-radius:50%;-moz-border-radius:50%;border-radius:50%}.vcomments{margin-top:3rem}.katex-mathml{display:none}.navbar{position:relative;padding-top:3rem;text-align:center}.navbar .nav{list-style:none;padding-left:0;margin-left:0}.navbar .nav .nav-item-link{display:block;padding:1rem;color:#172d3e;text-decoration:none;cursor:pointer}.navbar .nav .nav-item-link:hover{color:#1594c6}.navbar .nav.nav-main .nav-item-link i.fe,.navbar .nav.nav-main .nav-item-link::before{display:block;line-height:1}.navbar .nav.nav-main .nav-item-link::before{font-family:feathericon}.navbar .nav.nav-main .nav-item:first-child .nav-item-link::before{content:'\f12f'}.navbar .nav.nav-main .nav-item:nth-child(2) .nav-item-link::before{content:'\f1b1'}.navbar .nav.nav-main .nav-item:nth-child(3) .nav-item-link::before{content:'\f109'}.navbar .nav.nav-main .nav-item:nth-child(4) .nav-item-link::before{content:'\f11e'}.navbar .nav.nav-main .nav-item:nth-child(5) .nav-item-link::before{content:'\f198'}.navbar .nav.nav-main .nav-item:nth-child(6) .nav-item-link::before{content:'\f153'}.navbar .nav.nav-main .nav-item:nth-child(7) .nav-item-link::before{content:'\f174'}.navbar-bottom{position:absolute;bottom:0;width:100%}.logo{text-align:center}.logo img{width:4.2rem}.totop{position:relative;display:inline-block;overflow:hidden;cursor:pointer;width:3.2rem;height:3.2rem;-webkit-border-radius:3.2rem;-moz-border-radius:3.2rem;border-radius:3.2rem;background-color:#f4f4f4;line-height:3rem}.totop:hover>i{animation:rocket .3s ease-in-out}@-moz-keyframes rocket{0%{transform:translateY(0);opacity:1}45%{transform:translateY(-3.2rem);opacity:0}55%{transform:translateY(3.2rem);opacity:0}100%{transform:translateY(0);opacity:1}}@-webkit-keyframes rocket{0%{transform:translateY(0);opacity:1}45%{transform:translateY(-3.2rem);opacity:0}55%{transform:translateY(3.2rem);opacity:0}100%{transform:translateY(0);opacity:1}}@-o-keyframes rocket{0%{transform:translateY(0);opacity:1}45%{transform:translateY(-3.2rem);opacity:0}55%{transform:translateY(3.2rem);opacity:0}100%{transform:translateY(0);opacity:1}}@keyframes rocket{0%{transform:translateY(0);opacity:1}45%{transform:translateY(-3.2rem);opacity:0}55%{transform:translateY(3.2rem);opacity:0}100%{transform:translateY(0);opacity:1}}