@charset "UTF-8";.nowcoder-header{background:#3d444c;position:fixed;width:100%;z-index:101;left:0;margin-bottom:30px}.header-main{width:1200px;height:54px;margin:0 auto}.full-header .header-main{width:auto}.nowcoder-logo{background:url(//static.nowcoder.com/images/res/logo/logo-v3.png) no-repeat;background:url(//static.nowcoder.com/images/res/logo/logo-v3-ie.png) no-repeat\9;background-size:147px 42px;display:block;width:147px;height:42px;float:left;margin:6px 5px 0 0}.ico-nav-new{position:absolute;right:5px;top:8px;width:9px;height:12px;background:url(//static.nowcoder.com/images/img/icons/ico-new.png) no-repeat}.nowcoder-navbar{float:left}.nowcoder-other-nav{float:right}.nowcoder-other-nav li{position:relative}.nowcoder-other-nav .icon-nc-nav:before{font-size:20px;margin-right:3px}.nowcoder-other-nav>li:after{content:"|";position:absolute;right:0;top:16px;color:#8a96a7}.nowcoder-other-nav .profile-item:after{display:none}.nowcoder-other-nav .profile-item:hover:after{display:block;content:"";bottom:-1px;right:24px;border:6px solid #fff;border-color:transparent transparent #fff}.nowcoder-other-nav a[class^=icon-]:before{margin-right:5px;vertical-align:middle}.nowcoder-other-nav .icon-mobile-phone:before{font-size:20px}.nowcoder-navbar li{float:left;text-align:center;height:54px;position:relative}.nowcoder-navbar a{color:#ccc;font-size:16px;display:block;line-height:53px;padding:0 10px}.nowcoder-navbar .active a,.nowcoder-navbar a:hover{color:#fff;text-decoration:none}.nowcoder-navbar li.active,.nowcoder-navbar li:hover{background-color:#31363d}.nowcoder-navbar .nav-profile{position:relative;z-index:2}.nowcoder-navbar .nav-profile .img-box{display:inline-block;*display:inline;zoom:1;width:36px;height:36px;overflow:hidden;vertical-align:middle;border-radius:22px}.nowcoder-navbar .nav-profile img{width:36px;display:block}.nav-msg-tips{left:20px;position:absolute;background:#e84a4a;width:6px;height:6px;border-radius:50%;top:18px}.nav-msg-num{display:block;position:absolute;background:#e84a4a;color:#fff;border-radius:50px;line-height:14px;min-height:16px;outline:medium none;padding:0 4px;font-size:12px;text-align:center;left:20px;top:8px}.nav-msg-num.msg-dot{min-height:8px;top:16px}.nowcoder-navbar li:hover .sub-nav{display:block}.nowcoder-navbar .sub-nav{display:none;position:absolute;top:54px;left:0;padding:5px;background:#30363e}.nowcoder-navbar .sub-nav li{height:auto;border:none;padding:0 20px;float:none;margin-bottom:5px}.nowcoder-navbar .sub-nav li:hover{background:#3d444c}.nowcoder-navbar .sub-nav a{line-height:26px;color:#bfbfbf;padding:0;text-align:left;white-space:nowrap;font-size:14px}.nowcoder-navbar .sub-nav a:hover{color:#fff}.nowcoder-navbar .profile-item .nav-coins,.nowcoder-navbar .profile-item .nav-out,.nowcoder-navbar .profile-item .nav-profile-page,.nowcoder-navbar .profile-item .nav-set,.profile-item .icon-resume{background:url(//static.nowcoder.com/images/img/icons/ico-nav3.png) 15px -98px no-repeat;padding-left:35px}.nowcoder-navbar .profile-item .nav-set{background-position:15px -99px}.nowcoder-navbar .profile-item a:hover.nav-set{background-position:15px 10px}.nowcoder-navbar .profile-item .nav-out{background-position:15px -135px}.nowcoder-navbar .profile-item a:hover.nav-out{background-position:15px -27px}.nowcoder-navbar .profile-item .nav-coins{background-position:18px -205px}.nowcoder-navbar .profile-item a:hover.nav-coins{background-position:18px -240px}.nowcoder-navbar .profile-item .nav-profile-page{background-position:18px -273px}.nowcoder-navbar .profile-item a:hover.nav-profile-page{background-position:18px -306px}.nowcoder-navbar .profile-item .icon-resume{background-position:18px -341px}.nowcoder-navbar .profile-item a:hover.icon-resume{background-position:18px -375px}.nowcoder-other-nav a{font-size:14px}.nowcoder-navbar .nav-search{height:auto;margin-right:5px;position:relative}.nav-search-wrap{position:absolute;left:0;top:54px;background:#31363d;padding:10px;display:none}.nav-search:hover .nav-search-wrap{display:block}.nav-search .nav-search-txt{width:180px;height:25px;padding:0 5px;line-height:25px;background:#fff;border:none;border-radius:0;-webkit-transition:background-color .4s;transition:background-color .4s}.nav-search-ico.icon-search{position:absolute;right:10px;top:10px;height:25px;width:25px;text-align:center;line-height:25px;color:#fff;font-size:14px;background:#0b9}.nav-search-tips{position:absolute;background:#fff;box-shadow:0 2px 2px #eee;width:165px;top:90px;left:10px}.nav-search-tips a{line-height:26px;font-size:12px;color:#666;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;width:135px;word-wrap:normal}.nav-search-tips a.hover{background:#efefef}.nav-search.onfocus .nav-search-txt{background:#fff}.nav-search-tips a:hover{color:#333;background:#eee}.newnav-search-wrap{position:absolute;z-index:1000;left:25px;top:0;background:#31363d;height:34px;padding:10px 10px 10px 0;display:none}.nowcoder-navbar .newnav-search.onfocus,.nowcoder-navbar .newnav-search:hover{background:#363c43}.newnav-search.onfocus .newnav-search-wrap,.newnav-search:hover .newnav-search-wrap{display:block;background:#363c43}.newnav-search.onfocus .icon-search,.newnav-search:hover .icon-search{color:#00bc9b}.newnav-search-wrap .nav-search-txt,.newnav-search.onfocus .nav-search-txt{background:0 0;color:#fff;line-height:32px;height:32px;width:150px;-webkit-transition:background-color 0s;transition:background-color 0s}.newnav-search-cont{margin-left:-22px;padding-left:18px;padding-right:15px;border-bottom:1px solid #00bc9b}.newnav-search-cont .icon-search-colse{padding:0;position:absolute;right:15px;top:20px;width:9px;height:9px;background:url(//static.nowcoder.com/images/img/icons/icon-search-colse.png) no-repeat}.nav-account{background:#ff411c;border-radius:20px;color:#fff;line-height:24px;float:right;padding:2px 0;margin:12px 10px 0 10px;white-space:nowrap}.nav-account:hover{background:#fe6000}.nav-account a{display:inline-block;color:#fff;font-size:14px;padding:0 20px}.nav-account a:hover{color:#fff}.nav-account .nav-account-login{padding:0 3px 0 20px}.nav-account .nav-account-reg{padding:0 20px 0 3px}.profile-item:hover{cursor:pointer}.profile-item:hover .profile-hover-wrapper{display:block}.profile-hover-wrapper{display:none;position:absolute;right:0;top:54px;font-size:14px;background:#fff;width:260px;padding:10px;box-shadow:0 0 4px rgba(0,0,0,.2);border-radius:4px;border:1px solid #eee}.profile-hover-info{text-align:left;border-bottom:1px solid #e8eaed;padding-bottom:10px}.profile-hover-info .identity-hr-icon14{vertical-align:text-top}.profile-hover-name{display:inline-block;white-space:nowrap;overflow:hidden;vertical-align:middle;text-overflow:ellipsis;max-width:10em}.profile-hover-wrapper .profile-hover-btn,.profile-hover-wrapper .profile-hover-btn:hover{display:inline-block;border:1px solid #25bb9b;padding:4px 5px;font-size:12px;float:right;border-radius:4px;color:#25bb9b;line-height:1}.item-profile-box{margin-right:-10px;text-align:left;padding:10px 0}.profile-hover-wrapper .item-profile{display:inline-block;position:relative;vertical-align:top;width:76px;height:50px;padding:13px 0;color:#6f6f6f;line-height:1;text-align:center;margin:0 10px 0 0}.profile-hover-wrapper .item-profile.resume-receive::after{content:"";position:absolute;width:10px;height:10px;background:red;border-radius:50%;top:4px;right:20px}.profile-hover-wrapper .item-profile:hover{background:#f5f5f5;border-radius:4px;color:#6f6f6f}.hover-item-ico{background:url(//static.nowcoder.com/images/img/home/icon-person.png) no-repeat;width:24px;height:22px;margin:0 auto;margin-bottom:10px;display:block}.hover-item-ico1{background-position:0 0}.hover-item-ico2{background-position:-24px 0}.hover-item-ico3{background-position:-48px 0}.hover-item-ico4{background-position:-73px 0}.hover-item-ico5{background-position:-98px 0}.hover-item-ico6{background-position:-123px 0}.hover-accout-wrapper{border-top:1px solid #e8eaed}.hover-accout-wrapper a{color:#8a96a7;display:inline-block;width:45%;padding:15px 2% 10px;line-height:1}.hover-accout-wrapper a:hover{color:#25bb9b}.hover-accout-icon,.hover-accout-logout{display:inline-block;vertical-align:middle;width:16px;height:16px;margin-bottom:0;margin-right:10px;background-position:-153px 0}.hover-accout-wrapper a:hover .hover-accout-icon{background-position:-195px 0}.hover-accout-logout{background-position:-174px 0}.hover-accout-wrapper a:hover .hover-accout-logout{background-position:-216px 0}.written-video{display:none;position:absolute;background:#3d444c;padding:5px;line-height:1.6;right:0}.written-video a{margin-top:5px;font-size:14px;color:#fff}.written-video a:hover{color:#25bb9b}.written-video-inner{background:#a8b2bd;width:125px;height:94px;display:block}.ico-change-video,.ico-video-sm{display:inline-block;vertical-align:text-bottom;width:22px;height:18px;margin-right:5px;background:url(//static.nowcoder.com/fe/style/images/common/img/icons/ico-camera.png) no-repeat}.ico-video-sm{background-position:-57px 0}a:hover .ico-change-video{background-position:-29px 0}.nav-search-box{display:none;position:absolute;z-index:1001;background:#fff;border-radius:0 0 3px 3px;box-shadow:0 3px 4px rgba(0,0,0,.2);width:200px;top:53px;left:0;font-size:14px}.nav-search-box dl{margin-bottom:10px;text-align:left}.nav-search-box dt{font-weight:600;border-bottom:1px solid #ddd;padding:10px;margin-bottom:5px;position:relative}.nav-search-box dt:hover .icon-nc-delete{display:block}.nav-search-box dt .icon-nc-delete{display:none;position:absolute;right:5px;top:5px;margin-right:0}.nav-search-box dd{color:#404040;padding:0 10px;position:relative}.nav-search-box dd:hover{background:#f5f5f5;cursor:pointer}.nav-search-box dd:hover .icon-nc-close{display:block}.nav-search-box a{color:#404040;display:inline-block;line-height:30px;padding:0;display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:75%}.nav-search-box a:hover{color:#25bb9b}.nav-search-box .icon-nc-close{position:absolute;display:none;right:0;top:0;font-size:12px}.nav-search-box .nav-ad-tag{border:1px solid #cbcbcb;display:inline-block;padding:0 2px;vertical-align:middle;color:#bbb;font-size:12px;margin-left:5px;background:#fff;line-height:16px;border-radius:2px;position:relative}.nav-search-more{background:#f5f5f5;color:#7d7d7d;display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:100%;display:block;line-height:36px}.nav-search-more:hover{color:#25bb9b}.nowcoder-navbar .nav-search-wrapper:hover{background:0 0}.nowcoder-navbar .nav-search-wrapper:after{display:none}.nowcoder-navbar .nav-search-wrapper .search-input-wrap{margin-top:10px;background:#31363e;height:34px;line-height:34px;overflow:hidden;border:none;border-radius:3px}.nowcoder-navbar .nav-search-wrapper .search-input-wrap input{color:#fff;background:#31363e;padding:5px}.nowcoder-navbar .nav-search-wrapper .search-input-wrap .icon-search-btn{border-radius:0 3px 3px 0;height:34px;line-height:34px;width:auto;padding:0 5px 0 8px}.nowcoder-navbar .nav-search-wrapper .search-input-wrap .icon-search-btn:before{display:none}.search-input-wrap.focus .icon-search-btn{background:#25bb9b;color:#fff}.nowcoder-navbar .sub-nav-wrapper{padding:5px 0 20px}.nowcoder-navbar .sub-nav-wrapper li{padding:0 15px}.nowcoder-navbar .sub-nav-wrapper .sub-nav-btn{text-align:center}.sub-nav-wrapper{position:absolute;top:54px;left:0;padding:5px 0 20px;background:#30363e;z-index:200;font-size:0;white-space:nowrap}.sub-nav-wrapper .sub-nav-item{display:inline-block;vertical-align:top;font-size:14px}.sub-nav-wrapper .sub-nav-item ul{padding:5px}.sub-nav-wrapper .sub-nav-item+.sub-nav-item ul{border-left:1px solid #3d444c;border-right:1px solid #3d444c;margin-left:-1px}.sub-nav-wrapper .sub-nav-item+.sub-nav-item ul:last-child{border-right:none}.sub-nav-wrapper .sub-nav-item .sub-nav-title{text-align:left;padding-left:20px;color:#6f7c8d;font-size:14px;line-height:26px;margin-bottom:10px}.sub-nav-wrapper li{height:auto;border:none;padding:0 15px;float:none;margin-bottom:5px}.sub-nav-wrapper li:hover{background:#3d444c}.sub-nav-wrapper a{line-height:26px;color:#bfbfbf;padding:0;text-align:left;white-space:nowrap;font-size:14px}.sub-nav-wrapper a.selected{color:#25bb9b}.sub-nav-wrapper a:hover{color:#fff}.sub-nav-wrapper .sub-nav-btn{display:block;width:75%;margin:15px auto 0;border:1px solid #25bb9b;border-radius:4px;color:#25bb9b;text-align:center}.sub-nav-wrapper .sub-nav-btn .selected,.sub-nav-wrapper .sub-nav-btn:hover{color:#fff;background:#25bb9b}.written-time-wrapper{float:right;color:#fff;margin-left:10px;padding-top:8px}.written-time-wrapper.warn-time{color:#e26542}.written-time-wrapper i{margin-right:5px;font-size:14px}.written-time-wrapper .time-num{margin-top:4px;font-size:16px}.header-course-info{color:#fff;display:inline-block;margin:15px 20px 0;font-size:14px}.header-course-info .name{display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:20em}.header-course-info .path-wrapper{display:inline-block;vertical-align:middle}.header-course-info .path{color:#aaa;padding-left:5px}.header-course-info .path .selected,.header-course-info .path:hover{color:#fff}.header-course-info .path+.path{color:#fff}.header-course-info .path+.path:before{content:"/";margin-right:5px;color:#aaa}.header-course-share a{font-size:16px;margin-left:10px}.header-course-share .icon-nc-weibo{color:#ef5e3c}.header-course-share .icon-nc-qzone{color:#f7bb2a}.header-course-share .icon-nc-wechat{color:#40cf32}.ft-wrap{position:absolute;bottom:0;left:0;height:220px;width:100%;z-index:10;background:#2a2f35}.ft-cont{background:#2a2f35;width:1000px;margin:0 auto;padding:35px 0 30px}.ft-main{display:inline-block;vertical-align:middle;border-left:1px solid #646f7c;width:445px;padding:0 0 0 20px}.contact-email{margin-left:20px}.ft-links li{display:inline-block;*zoom:1;*display:inline;margin:0 15px 5px 0}.ft-links a{color:#a9b8ca}.webrights{margin-top:5px}.webrights li{margin-bottom:1px;color:#798fac}.webrights a{color:#798fac}.ft-web-info{display:inline-block;vertical-align:middle;width:310px;padding:0 15px}.ft-web-name{font-size:20px;color:#fff;margin:-25px 0 20px}.ft-web-info a{display:inline-block;vertical-align:middle;position:relative;width:32px;height:26px;margin-right:35px;background:url(https://static.nowcoder.com/fe/style/images/common/img/icons/ft-icons.png) no-repeat}.ft-web-info .ft-qq-ico{width:22px;background-position:0 0}.ft-web-info .ft-qq-ico:hover{background-position:0 -26px}.ft-web-info .ft-wx-ico{background-position:-60px 0}.ft-web-info .ft-wx-ico:hover{background-position:-60px -26px}.ft-web-info .ft-wb-ico{background-position:-126px 0}.ft-web-info .ft-wb-ico:hover{background-position:-126px -26px}.ft-web-info .ft-zh-ico{background-position:-194px 0;width:26px}.ft-web-info .ft-zh-ico:hover{background-position:-194px -26px}.ft-web-info .ft-jian-ico{background-position:-259px 0;width:26px;margin-right:0}.ft-web-info .ft-jian-ico:hover{background-position:-259px -26px}.ft-web-info .tooltip{display:none}.ft-web-info a:hover .tooltip{display:block}.ft-wrap .tooltip-inner{background:#fff;border:1px solid #ddd;border-radius:3px;padding:18px}.ft-wrap .tooltip-inner p{color:#333;margin:5px 0 0;font-size:14px;text-align:left}.ft-wrap .tooltip.top{bottom:30px;left:50%;margin-left:-74px}.ft-wrap .tooltip.top .tooltip-arrow{border-top-color:#fff;bottom:1px}.ft-app{display:inline-block;vertical-align:middle;width:180px;color:#8793a2;font-size:14px;margin-top:0;text-align:center}.ft-qrcode-box{background:#5b646d;padding:8px;border-radius:5px;width:110px;height:110px;margin:0 auto 10px}.ft-qrcode-box img{width:100%}.fixed-menu{position:fixed;z-index:999;right:10px;bottom:120px;zoom:1}.fixed-menu .novice-treasure-chest{position:relative;width:50px;height:45px;margin-left:-13px;background-image:url(//static.nowcoder.com/fe/file/images/web/icons/treasure-chest-locked.png);background-size:contain;cursor:pointer;-webkit-transition:.3s ease;transition:.3s ease}.fixed-menu .novice-treasure-chest .icon-nc-cancel{display:none;position:absolute;right:0}.fixed-menu .novice-treasure-chest.open{background-image:url(//static.nowcoder.com/fe/file/images/web/icons/treasure-chest-unlocked.png)}.fixed-menu .novice-treasure-chest.open,.fixed-menu .novice-treasure-chest:hover{width:100px;height:90px;margin-left:-63px}.fixed-menu .novice-treasure-chest.open .icon-nc-cancel,.fixed-menu .novice-treasure-chest:hover .icon-nc-cancel{display:inline}.fixed-menu .stc-entry{position:relative;display:block;margin-left:-54px;width:125px;height:123px;background:center/contain url(//static.nowcoder.com/fe/file/images/web/activity/spring-training-camp-entry.png)}.fixed-menu .stc-entry:hover::before{content:"";position:absolute;left:-8px;width:8px;height:100%}.fixed-menu .stc-entry:hover .stc-detail{display:block}.fixed-menu .stc-entry .stc-detail{position:absolute;top:50%;-webkit-transform:translateY(-50%);-ms-transform:translateY(-50%);transform:translateY(-50%);display:none;right:133px;padding:20px 28px;border-radius:10px;text-align:center;background-color:#fff;box-shadow:0 2px 12px 0 rgba(0,0,0,.1);-webkit-filter:drop-shadow(0 2px 12px rgba(0, 0, 0, .1));filter:drop-shadow(0 2px 12px rgba(0, 0, 0, .1))}.fixed-menu .stc-entry .stc-detail::after{content:"";position:absolute;right:-16px;top:50%;-webkit-transform:translateY(-50%);-ms-transform:translateY(-50%);transform:translateY(-50%);border:8px solid transparent;border-left-color:#fff}.fixed-menu .stc-entry .stc-title{position:relative;display:inline-block;margin:32px auto 16px auto;color:#333;font-weight:700;font-size:16px}.fixed-menu .stc-entry .stc-title:first-child{margin-top:0}.fixed-menu .stc-entry .stc-title::after,.fixed-menu .stc-entry .stc-title::before{content:"";position:absolute;display:block;width:7px;height:7px;background:-webkit-linear-gradient(315deg,#22d597 0,#26bb9c 100%);background:linear-gradient(135deg,#22d597 0,#26bb9c 100%);border-radius:1px;z-index:-1}.fixed-menu .stc-entry .stc-title::before{left:-3px;top:-1px}.fixed-menu .stc-entry .stc-title::after{right:-3px;bottom:-1px}.fixed-menu .stc-entry .stc-target-list{width:420px;display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-webkit-justify-content:space-between;-moz-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between}.fixed-menu .stc-entry .stc-target-list>.stc-target-item{display:block;margin-bottom:0;width:205px;height:58px;text-align:center;line-height:58px;font-size:16px;color:#fff}.fixed-menu .stc-entry .stc-target-list>.stc-target-item:first-child{margin-left:0}.fixed-menu .stc-entry .stc-target-list>.stc-target-item:nth-child(odd){background:center/contain url(//static.nowcoder.com/fe/file/images/web/activity/spring-training-camp-bg-purple.png)}.fixed-menu .stc-entry .stc-target-list>.stc-target-item:nth-child(even){background:center/contain url(//static.nowcoder.com/fe/file/images/web/activity/spring-training-camp-bg-orange.png)}.fixed-menu .stc-entry .stc-schedule-menu{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;margin:8px auto 16px auto;width:370px;height:20px;-webkit-box-pack:justify;-webkit-justify-content:space-between;-moz-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;background:center/contain url(//static.nowcoder.com/fe/file/images/web/activity/spring-training-camp-dash.png)}.fixed-menu .stc-entry .stc-schedule-menu>.stc-stage{display:block;width:46px;height:20px;border-radius:4px;text-align:center;line-height:20px;color:#fff;font-weight:700;background-image:-webkit-linear-gradient(315deg,#ffcd89 0,#ffad7e 100%);background-image:linear-gradient(135deg,#ffcd89 0,#ffad7e 100%)}.fixed-menu .stc-entry .stc-schedule-menu>.stc-stage:last-child{background-image:-webkit-linear-gradient(238deg,#f80 0,#fe5000 100%);background-image:linear-gradient(212deg,#f80 0,#fe5000 100%)}.fixed-menu .stc-entry .stc-schedule-plan{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-pack:justify;-webkit-justify-content:space-between;-moz-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between}.fixed-menu .stc-entry .stc-schedule-plan>.stc-milestone{display:-webkit-box;display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;-webkit-box-orient:vertical;-webkit-box-direction:normal;-webkit-flex-direction:column;-moz-box-orient:vertical;-moz-box-direction:normal;-ms-flex-direction:column;flex-direction:column;width:99px;height:93px;-webkit-box-pack:center;-webkit-justify-content:center;-moz-box-pack:center;-ms-flex-pack:center;justify-content:center;-webkit-box-align:center;-webkit-align-items:center;-moz-box-align:center;-ms-flex-align:center;align-items:center;color:#666;background:center/contain url(//static.nowcoder.com/fe/file/images/web/activity/spring-training-camp-bg-block.png);-moz-box-sizing:border-box;box-sizing:border-box}.fixed-menu .stc-entry .stc-schedule-plan>.stc-milestone:last-child{width:93px;background-image:-webkit-linear-gradient(314deg,#f3f3f6 0,rgba(255,255,255,0) 100%);background-image:linear-gradient(136deg,#f3f3f6 0,rgba(255,255,255,0) 100%);border:1px solid #f3f3f6;border-radius:10px}.fixed-menu .stc-entry .stc-chapter-list{text-align:left;color:#333;font-weight:700}.fixed-menu .stc-entry .stc-chapter-list>.stc-chapter-item{margin-bottom:12px}.fixed-menu .stc-entry .stc-chapter-list>.stc-chapter-item p{font-weight:700}.fixed-menu .stc-entry .stc-chapter-list>.stc-chapter-item:last-child{margin-bottom:0}.fixed-menu .stc-entry .stc-chapter-list>.stc-chapter-item>.stc-section-list{margin-left:40px;color:#666;font-weight:400}.fixed-menu .stc-entry .stc-chapter-list>.stc-chapter-item>.stc-section-list>.stc-section-item{margin-bottom:4px}.fixed-menu .stc-entry .stc-chapter-list>.stc-chapter-item>.stc-section-list:last-child{margin-bottom:0}.fixed-menu .stc-entry .stc-link-btn{position:relative;margin:20px auto 0;padding:6px 24px;color:#fff;font-weight:700;border:none;border-radius:5px;background:-webkit-linear-gradient(left,#22d597,#26bb9c);background:linear-gradient(to right,#22d597,#26bb9c)}.fixed-menu .stc-entry .stc-link-btn::after{content:"";position:absolute;top:5px;left:5px;width:100%;height:100%;border:1px solid #a9e4d7;z-index:-1;border-radius:5px 0}.fixed-menu li{margin-bottom:5px;position:relative;zoom:1}.fixed-menu li a{float:left;width:35px;height:35px;line-height:16px;border-radius:3px;border:1px solid #d6d6d6;background:#fff url(//static.nowcoder.com/fe/style/images/common/img/common/ico-fixed-menu2.png) no-repeat}.fixed-menu li a:hover{background-color:#1abc9c;border-color:#1abc9c}.fixed-menu li:after,.fixed-menu li:before{clear:both;content:".";display:block;height:0;visibility:hidden}.wx-qrcode img{width:148px;height:148px}.fixed-menu li a,.fixed-menu li a.gotop{background-position:8px -225px}.fixed-menu li a:hover.gotop{background-position:8px 10px}.fixed-menu li a.fixed-wb{background-position:8px -262px}.fixed-menu li a:hover.fixed-wb{background-position:8px -28px}.fixed-menu li a.qq{background-position:8px -303px}.fixed-menu li a:hover.qq{background-position:8px -68px}.fixed-menu li a.wx{background-position:8px -343px}.fixed-menu li a:hover.wx{background-position:8px -108px}.fixed-menu li a.feedback{background-position:8px -382px}.fixed-menu li a:hover.feedback{background-position:8px -148px}.fixed-menu li a.qrcode{background-position:8px -422px}.fixed-menu li a:hover.qrcode{background-position:8px -188px}.fixed-menu li a.feedback-letter,.fixed-menu li a.wx-letter{display:none}.fixed-menu li:hover a.feedback-letter{background:#1abc9c;display:block;color:#fff;text-align:center;line-height:1.5}.fixed-menu li:hover a.wx{display:block}.fixed-menu li:hover a.feedback{display:none}.fixed-menu li .wx-qrcode{height:178px;width:158px;background:url(https://static.nowcoder.com/images/img/fixed-menu.png) no-repeat;position:absolute;left:-190px;top:-160px;padding:16px;display:none}.fixed-menu li:hover .wx-qrcode{display:block}.phone-qrcode p,.wx-qrcode p{text-align:center;margin-top:10px}.phone-qrcode p{margin-top:5px}.fixed-menu li .weibo-popup{background:url(https://static.nowcoder.com/images/img/fixed-hoverbg.png) no-repeat;position:absolute;left:-190px;top:-60px;width:155px;height:108px;padding:16px;display:none}.fixed-menu li:hover .weibo-popup{display:block}.phone-qrcode{position:relative;background:#fff;width:70px;padding:15px 10px 5px;margin-left:-54px}.phone-qrcode img{width:70px;height:70px;display:block}.qrcode-close{position:absolute;top:-2px;right:3px;font-weight:600}.living-layer{background:rgba(0,0,0,.78);color:#fff;position:fixed;bottom:10px;right:10px;border-radius:3px;padding:10px;font-size:14px;z-index:9999}.living-layer .icon-nc-cancel{color:#fff;font-size:16px;position:absolute;right:10px;top:10px}.living-layer a{display:block;color:#fff}.living-layer a:hover{color:#25bb9b;cursor:pointer}.living-layer .icon-nc-play{font-size:30px;display:inline-block;vertical-align:middle;color:#25bb9b}.living-layer .living-layer-cont{display:inline-block;vertical-align:middle;margin-right:30px;margin-left:5px}.living-layer .living-layer-title{margin-bottom:5px;color:#25bb9b}.layer-share-wrapper{position:absolute;z-index:200;padding:15px;background:#fff;border:1px solid #e5e5e5;border-radius:4px;box-shadow:0 0 4px rgba(0,0,0,.2)}.layer-share-wrapper .arrow{position:absolute;height:0;width:0;border:8px solid #ddd;border-color:transparent transparent #ddd transparent;top:-16px;left:40px}.layer-share-wrapper .arrow:before{content:"";position:absolute;height:0;width:0;border:7px solid #fff;border-color:transparent transparent #fff transparent;top:-6px;left:-7px;z-index:2}.layer-share-wrapper .arrow.bottom{border-color:#e5e5e5 transparent transparent transparent;top:auto;bottom:-16px}.layer-share-wrapper .layer-share-item{display:inline-block;vertical-align:top;color:#737373;text-align:center;width:55px;white-space:nowrap;font-size:12px}.layer-share-wrapper .layer-share-item:hover{color:#25bb9b;cursor:pointer}.layer-share-wrapper .layer-share-item:hover .ico-nc-share{background-position:0 -52px}.layer-share-wrapper .layer-share-item:hover .ico-picture{background-position:-62px -52px}.layer-share-wrapper .layer-share-item:hover .ico-nc-wechat{background-position:-197px -52px}.layer-share-wrapper .layer-share-item:hover .ico-nc-qq{background-position:-134px -52px}.layer-share-wrapper .layer-share-item:hover .ico-nc-qzone{background-position:-270px -52px}.layer-share-wrapper .layer-share-item:hover .ico-nc-weibo{background-position:-340px -52px}.layer-share-wrapper .layer-share-item:hover .ico-nc-link{background-position:-412px -52px}.layer-share-wrapper .layer-share-item i{height:44px;width:52px;margin-bottom:5px;background:url(//static.nowcoder.com/fe/style/images/common/img/icons/ico-share-lg.png) no-repeat;display:inline-block;vertical-align:top;-webkit-transform:scale(.5);-ms-transform:scale(.5);transform:scale(.5);-webkit-transform-origin:center bottom;-ms-transform-origin:center bottom;transform-origin:center bottom;margin-top:-20px}.layer-share-wrapper .layer-share-item .ico-nc-share{background-position:0 0;width:42px}.layer-share-wrapper .layer-share-item .ico-picture{background-position:-62px 0}.layer-share-wrapper .layer-share-item .ico-nc-wechat{background-position:-197px 0}.layer-share-wrapper .layer-share-item .ico-nc-qq{background-position:-134px 0;width:38px}.layer-share-wrapper .layer-share-item .ico-nc-qzone{background-position:-270px 0;width:46px}.layer-share-wrapper .layer-share-item .ico-nc-weibo{background-position:-340px 0}.layer-share-wrapper .layer-share-item .ico-nc-link{background-position:-412px 0;width:45px}.layer-share-wrapper .layer-share-item+.layer-share-item{margin-left:10px}.layer-share-wrapper.layer-share-dark{background:rgba(0,0,0,.8);color:#fff;border:none}.layer-share-wrapper.layer-share-dark .arrow{border-color:transparent transparent rgba(0,0,0,.8) transparent}.layer-share-wrapper.layer-share-dark .arrow:before{display:none}.layer-share-wrapper.layer-share-dark .layer-share-item{color:#fff}.layer-share-wrapper.layer-share-dark .layer-share-item i{margin-bottom:10px;background:0 0;display:inline-block;vertical-align:top;zoom:1;font-size:24px;width:auto;height:auto}.test-tab-wrap{padding-top:54px;background:#31363f;height:35px;margin-bottom:-54px;width:100%;position:relative;z-index:2}.with-validate .test-tab-wrap{margin-bottom:-90px;padding-top:90px}.test-tab-cont{width:1200px;margin:0 auto}.fixed-tab{position:fixed;z-index:90}.test-center-page.with-fixed-tab{padding-top:120px}.with-validate .with-fixed-tab{padding-top:155px}.test-tab{float:left}.test-tab li{float:left;margin-right:30px;line-height:32px;font-size:14px}.test-tab li.selected,.test-tab li:hover{border-bottom:3px solid #e45600}.test-tab a{color:#fff;display:block}.new-subject-upload{float:right;margin-top:8px;color:#666}.new-subject-upload .icon-cloud-upload{margin-right:5px;font-size:14px;color:#fff;vertical-align:middle}.new-subject-upload a{color:#fff}.topic-list{margin-right:-20px}.topic-list li{position:relative;float:left;width:217px;height:208px;margin:0 18px 25px 0;border:1px solid #eee}.topic-img{width:217px;height:144px;overflow:hidden;background:#eee;display:block}.topic-info{padding:10px}.topic-head{font-size:14px;margin-bottom:5px;overflow:hidden;width:200px;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal}.tq-sum{float:left;background:url(//static.nowcoder.com/images/img/icons/icon-topic.png) 0 2px no-repeat;padding-left:20px}.tq-join{float:right}.topic-info .btn{display:none;position:absolute;right:5px;bottom:5px;padding:4px 0}.topic-done-tag{position:absolute;top:0;right:0;height:0;width:0;border-width:12px;border-color:#6b6b6b #6b6b6b transparent transparent;border-style:solid}.topic-list li:hover{border-color:#5f5f5f;cursor:pointer}.topic-list li:hover .btn{display:block}.interested-topic .module-body{padding:10px}.interested-topic .topic-list li{margin:0 5px 10px 0}.list-title{margin-bottom:5px;font-size:14px}.list-title .sign-reward{margin:0 5px 0 0}.list-module li+li{border-top:1px solid #f3f3f9;padding-top:10px;margin-top:10px}.list-module li+li:after{content:"";display:block;clear:both;font-size:0;height:0}.list-module .list-name{line-height:24px}.list-module .list-legend{color:#999;margin-top:5px;white-space:nowrap}.list-module .list-legend a{padding:0 5px;color:#999}.list-module .list-legend a:hover{color:#25bb9b}.list-module .list-legend .time{float:right}.list-module .list-legend>span a{line-height:1}.list-module .list-legend>span a+a{border-left:1px solid #ccc;padding-left:8px}.list-module.side-topic-list .list-name{display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:100%}.list-module.side-topic-list .list-name>span{display:inline-block;vertical-align:middle}.list-module.side-topic-list .list-name>span.txt{display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:230px}.list-module.side-topic-list li+li{border:none}.comm-num{float:right}.comm-num a{color:#999;padding:0}.column-best-list li{border-bottom:1px solid #ddd;margin-bottom:20px;padding-bottom:20px;font-size:14px}.column-best-list li:last-child{border-bottom:none}.column-best-list .hd{margin-bottom:10px}.column-best-list .hd .pic{width:40px;height:40px;border-radius:50%;display:inline-block;vertical-align:middle;background:#f2f2f2;position:relative}.column-best-list .hd .pic .icon-nc-pen2{position:absolute;right:0;bottom:-3px;color:#46a2f0}.column-best-list .hd .name{display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:20em;margin-left:6px}.column-best-list .hd .time{color:#aaa;float:right;margin-top:10px}.column-best-list .bd{margin-bottom:20px}.column-best-list .bd:after{content:"";clear:both;overflow:hidden;display:block}.column-best-list .bd .cont h4{font-size:16px;margin-bottom:10px}.column-best-list .bd .cont p{color:#888}.column-best-list .bd .cont.with-pic{width:73%;margin-right:20px;display:inline-block;vertical-align:middle}.column-best-list .bd .pic{width:180px;min-height:100px;float:right;background:#f2f2f2}.column-best-list .ft .oprt{float:right}.column-best-list .ft .oprt>span{color:#939393;margin-left:20px}.column-best-list .ft .oprt i{margin-right:5px}.special-side-list li{padding-bottom:15px;margin-bottom:15px;border-bottom:1px solid #eee}.special-side-list li:after{content:"";clear:both;overflow:hidden;display:block}.special-side-list li .pic{width:60px;height:60px;background:#f4f4f4;float:left}.special-side-list li .pic img{width:100%}.special-side-list li .cont{margin-left:70px;color:#888;font-size:14px}.special-side-list li .cont h4{margin-bottom:5px;color:#333;display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:100%}.special-side-list li .cont p{margin-bottom:5px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;max-height:40px}.special-side-list li .cont .info{font-size:12px;height:20px}.special-side-list li .cont .info>span{display:inline-block;width:70px;line-height:1}.special-side-list li .cont .info>span+span{border-left:1px solid #ddd;padding-left:20px;margin-left:10px}.column-order-list li{border-bottom:1px solid #ddd;margin-bottom:30px;padding-bottom:30px;font-size:14px}.column-order-list li:last-child{border-bottom:none}.column-order-list .pic{width:110px;height:160px;background:#f4f4f4;float:left}.column-order-list .pic img{width:100%}.column-order-list .cont{margin-left:135px;font-size:14px}.column-order-list .cont .hd{margin-bottom:10px}.column-order-list .cont .hd .title{font-size:16px;display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:20em}.column-order-list .cont .hd .head{width:40px;height:40px;border-radius:50%;display:inline-block;vertical-align:middle;background:#f2f2f2}.column-order-list .cont .hd .name{display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:8em;font-size:14px;margin:0 6px}.column-order-list .cont .bd p{color:#888;margin-bottom:10px;line-height:1.6}.column-order-list .cont .info{margin-top:-10px;float:right;display:flex;align-items:center}.column-order-list .cont .info a{line-height:14px}.column-order-list .cont .ft{margin-top:15px}.column-order-list .cont .ft .pirce{font-size:28px;line-height:1;display:inline-block;vertical-align:middle}.column-order-list .cont .ft .pirce-ico{font-size:16px;display:inline-block}.column-order-list .cont .ft .btn{width:70px;padding:5px 0;text-align:center;border-radius:16px;margin-left:10px}.column-order-list .cont .ft .order-info{font-size:14px;color:#888;display:inline-block;vertical-align:middle;line-height:1;margin-left:30px}.column-order-list .cont .ft .order-info>span+span{border-left:1px solid #aaa;padding-left:20px;margin-left:20px}.free-read-wrapper .free-read-item{display:inline-block;vertical-align:top;margin-right:20px;margin-bottom:10px}.free-read-wrapper .free-read-item .free-tag{color:#25bb9b;border:1px solid #25bb9b;border-radius:4px;display:inline-block;vertical-align:middle;line-height:1;padding:2px 4px}.free-read-wrapper .free-read-item .free-title{display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:18em;width:18em}.nk-main{width:1200px}.nk-content{width:810px}.nk-content .menu-txt-box{padding:0;margin-left:-10px;margin-bottom:20px;font-size:16px}.nk-bar{width:380px}.nk-bar .special-side-list li:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.nk-bar .special-side-list .pic-radius{border-radius:50%}.nk-bar .special-side-list .p-gray{color:#999;font-size:12px;margin-top:3px}.nk-bar .instructions-tips{font-size:12px;color:#666;padding-bottom:15px}.nk-bar .instructions-tips a{color:#25bb9b}.nk-bar .fixed-sidebar{position:fixed;width:300px;top:54px;z-index:10}.nk-bar .module-box>section{margin:0 20px}.nk-bar .module-box>section+section{border-top:1px solid #f2f2f2}.nk-bar .module-box .module-head{padding-top:20px;padding:15px 0 0}.nk-bar .module-box .module-body{padding:20px 0}.column-order-entry{display:block;font-size:16px;border:1px solid #25bb9b;background:#ecfffc;color:#25bb9b;border-radius:6px;margin:20px 0;text-align:center;height:50px;line-height:50px}.column-menu-wrapper{margin-bottom:20px}.column-menu-wrapper li{height:50px;line-height:50px;font-size:16px;padding:0 35px}.column-menu-wrapper li a{display:block}.column-menu-wrapper li:hover{background:#f8f8f8}.column-menu-wrapper li .ico-column-menu{background:url(//static.nowcoder.com/images-nk/img/icons/ico-column-menu.png) no-repeat;margin-right:10px;display:inline-block;vertical-align:middle;width:16px;height:16px}.column-menu-wrapper li span{display:inline-block;vertical-align:middle}.column-menu-wrapper li .ico-column-best{background-position:0 0}.column-menu-wrapper li .ico-column-js{background-position:0 -52px}.column-menu-wrapper li .ico-column-c{background-position:0 -99px}.column-menu-wrapper li .ico-column-ai{background-position:0 -144px}.column-menu-box{background:#fff;margin-bottom:20px}.column-menu{width:1100px;margin:0 auto;text-align:center}.column-menu>li{position:relative;display:inline-block;height:40px;line-height:40px;padding:15px 20px 5px;font-size:16px;font-weight:600;text-align:center;cursor:pointer}.column-menu>li.selected,.column-menu>li:hover{border-bottom:3px solid #25bb9b;margin-bottom:-3px}.column-menu>li.selected a,.column-menu>li:hover a{color:#25bb9b}.column-menu>li+li{margin-left:150px}.topic-banner{height:300px;width:1200px;margin-bottom:0}.topic-oprt{position:absolute;right:25px;bottom:25px}.topic-oprt .btn{border-radius:16px;line-height:30px;height:30px;padding:0;margin-left:10px}.topic-oprt .btn-decorate{background:0 0;color:#fff;border-color:#fff}.column-author-list li{margin-bottom:20px}.column-author-list .pic{display:inline-block;vertical-align:middle;width:60px;height:60px;background:#f2f2f2;border-radius:50%}.column-author-list .pic img{width:100%}.column-author-list .author-info{width:260px;margin-left:10px;font-size:16px;display:inline-block;vertical-align:middle;position:relative}.column-author-list .author-info h4{display:inline-block;vertical-align:middle;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-wrap:normal;max-width:10em}.column-author-list .author-info .show-detail{position:absolute;right:0;top:5px;font-size:12px;color:#666}.column-author-list .author-info .show-detail:hover{color:#25bb9b}.column-author-list .author-info .show-detail i{font-size:16px;vertical-align:middle;margin-right:5px}.column-author-list .author-info .btn{position:absolute;right:0;top:0;border-radius:16px;font-size:12px;padding:5px 10px;width:auto}.column-author-list .cont{margin:10px 0 0;font-size:14px;color:#888}.tip-free-tag{position:relative;display:inline-block;vertical-align:middle;background:#ffa337;border-color:#ffa337;color:#fff;font-size:12px;height:24px;line-height:24px;padding:0 5px 0 3px;text-align:center}.tip-free-tag:after{border-style:solid;border-color:inherit;border-width:12px 5px;position:absolute;content:"";bottom:0;left:-10px;border-left-color:transparent}.special-column-author{color:#936631;background:#f3d9a2;position:relative;border-radius:16px;line-height:18px;height:18px;display:inline-block;vertical-align:middle}.special-column-author>a{color:#936631;margin:0 8px 0 20px}.special-column-author>a:hover{color:#936631}.special-column-author img{position:absolute;top:-5px;left:0}.special-course-list{width:100%;margin-right:-30px;margin-bottom:-20px;font-size:0}.special-course-list li{width:100%;margin:0 28px 25px 0;display:inline-block;vertical-align:top}.special-course-list .info{font-size:14px}.special-course-list .info .info-right{display:inline-block;float:right;color:#999}.special-course-list .pic{width:155px;display:block;overflow:hidden;background:#fff;margin-bottom:15px;cursor:pointer}.special-course-list .pic img{max-width:80%}.module-head-oprt .link-gray{color:#666}.module-head-oprt .link-gray:hover{color:#25bb9b}.group-price-box{display:inline-block;vertical-align:middle}.group-price-box .mark-group-tag{background:#fff5dd;border:1px solid #e8b339;color:#e8b339;border-radius:4px;padding:2px 4px}.group-price-box .new,.group-price-box .old{color:#f9834c;font-size:20px;font-weight:500;margin-left:10px;display:inline-block;vertical-align:middle;font-family:PingFang SC}.group-price-box .old{color:#afafaf;text-decoration:line-through}