.fullCourseUnlockPopUp{width:19.5rem!important;margin-bottom:0;overflow:visible;background:transparent!important;box-shadow:none!important}.fullCourseUnlockPopUp .el-dialog__header{display:none!important;padding:0!important}.fullCourseUnlockPopUp .el-dialog__body{padding:0!important;overflow:visible;background:transparent}.full-course-unlock-dialog{width:19.5rem;display:flex;flex-direction:column;align-items:center}.full-course-unlock-close{display:block;padding:0;border:0;background:transparent;cursor:pointer}.full-course-unlock-close img{display:block;width:100%;height:100%}.full-course-unlock-card{position:relative;width:19.5rem;height:16.857143rem}.full-course-unlock-card>img{display:block;width:100%;height:100%}.full-course-unlock-action{position:absolute;left:3.142857rem;bottom:1.714286rem;width:13.214286rem;height:2.714286rem;padding:0;border:0;border-radius:1.857143rem;background:transparent;cursor:pointer}.full-course-unlock-close{width:2.464286rem;height:2.464286rem;margin-top:1.714286rem;border-radius:50%}.whetherVipPopUp{width:23.714286rem;border-radius:1.142857rem!important;overflow:hidden;border:.142857rem solid transparent;background:linear-gradient(#fffdf6,#fff7e6) padding-box,linear-gradient(135deg,#f9d27a,#ecac2c 45%,#c8871a) border-box!important;box-shadow:0 1.142857rem 2.857143rem rgba(150,110,40,.22)}.whetherVipPopUp.whetherVipPopUp--svip{background:linear-gradient(#fdfcff,#f7f3ff) padding-box,linear-gradient(135deg,#d6c2f2,#a878e2 45%,#7c4fc4) border-box!important;box-shadow:0 1.142857rem 2.857143rem rgba(90,60,160,.2)}.whetherVipPopUp .el-dialog__header{display:none!important;padding:0!important;height:0!important;min-height:0!important;margin:0!important;border:none!important;overflow:hidden!important}.whetherVipPopUp.el-dialog--center .el-dialog__body,.whetherVipPopUp .el-dialog__body{padding:0!important;margin:0!important;background:transparent}.whetherVipPopUp .whether-vip-dialog{position:relative;display:flex;flex-direction:column;align-items:center;padding:2rem 1.714286rem 1.714286rem;box-sizing:border-box;background:transparent}.whetherVipPopUp .whether-vip-hero{position:relative;width:100%;margin:0 0 .285714rem;display:flex;justify-content:center}.whetherVipPopUp .whether-vip-close{position:absolute;top:.428571rem;right:.428571rem;width:1.714286rem;height:1.714286rem;padding:0;border:none;background:transparent;color:#c39a52;font-size:1.142857rem;line-height:1.714286rem;cursor:pointer;display:flex;align-items:center;justify-content:center;z-index:4;transition:color .2s ease}.whetherVipPopUp .whether-vip-close:hover{color:#8a5f14}.whetherVipPopUp.whetherVipPopUp--svip .whether-vip-close{color:#a291c6}.whetherVipPopUp.whetherVipPopUp--svip .whether-vip-close:hover{color:#5f4a8a}.whetherVipPopUp .whether-vip-icon-ring{position:relative;z-index:1;width:6.857143rem;height:6.857143rem;border-radius:50%;padding:.214286rem;box-sizing:border-box;background:linear-gradient(135deg,#f9d886,#dda12f);display:flex;align-items:center;justify-content:center;box-shadow:0 .428571rem 1.142857rem rgba(200,145,40,.34)}.whetherVipPopUp.whetherVipPopUp--svip .whether-vip-icon-ring{background:linear-gradient(135deg,#ddc8f7,#9868d8);box-shadow:0 .428571rem 1.142857rem rgba(120,80,190,.3)}.whetherVipPopUp .whether-vip-icon{width:100%;height:100%;border-radius:50%;background:#fffdf6;border:.071429rem solid rgba(224,178,88,.55);box-sizing:border-box;display:flex;align-items:center;justify-content:center;overflow:hidden}.whetherVipPopUp.whetherVipPopUp--svip .whether-vip-icon{background:#fdfbff;border-color:rgba(180,150,230,.5)}.whetherVipPopUp .whether-vip-icon-img{width:5.571429rem;height:5.571429rem;object-fit:cover;display:block;border-radius:50%}.whetherVipPopUp .whether-vip-divider{display:flex;align-items:center;justify-content:center;gap:.571429rem;margin:1rem 0 1rem}.whetherVipPopUp .whether-vip-divider i{display:block;width:4rem;height:.071429rem;background:linear-gradient(90deg,rgba(224,172,74,0),#e0ac4a)}.whetherVipPopUp .whether-vip-divider i:last-child{background:linear-gradient(90deg,#e0ac4a,rgba(224,172,74,0))}.whetherVipPopUp .whether-vip-divider b{width:.5rem;height:.5rem;transform:rotate(45deg);background:linear-gradient(135deg,#f4c85f,#d19722)}.whetherVipPopUp.whetherVipPopUp--svip .whether-vip-divider i{background:linear-gradient(90deg,rgba(168,130,230,0),#a882e6)}.whetherVipPopUp.whetherVipPopUp--svip .whether-vip-divider i:last-child{background:linear-gradient(90deg,#a882e6,rgba(168,130,230,0))}.whetherVipPopUp.whetherVipPopUp--svip .whether-vip-divider b{background:linear-gradient(135deg,#c4a3ee,#8b5fcf)}.whetherVipPopUp .whether-vip-body{width:100%;box-sizing:border-box;text-align:center;background:transparent}.whetherVipPopUp .title{font-size:1.5rem;font-weight:700;color:#6a481a;line-height:2rem;margin-bottom:.714286rem;letter-spacing:.071429rem}.whetherVipPopUp.whetherVipPopUp--svip .title{color:#4a3183}.whetherVipPopUp .text{margin:0;font-size:.928571rem;font-weight:400;color:#a1855c;line-height:1.428571rem}.whetherVipPopUp.whetherVipPopUp--svip .text{color:#8a7bb0}.whetherVipPopUp .bottom{cursor:pointer;display:flex;width:100%;margin-top:1.857143rem;box-sizing:border-box;justify-content:center;gap:.857143rem;background:transparent}.whetherVipPopUp .cancel,.whetherVipPopUp .recharge{flex:1;max-width:9.142857rem;height:3rem;border-radius:.857143rem;font-size:1.071429rem;font-weight:600;line-height:3rem;text-align:center;box-sizing:border-box;transition:transform .15s ease,box-shadow .2s ease,opacity .2s ease}.whetherVipPopUp .cancel{background:#fff;border:.071429rem solid #e7d3a8;color:#8a6d3d}.whetherVipPopUp.whetherVipPopUp--svip .cancel{border-color:#ddd0f5;color:#6b5a92}.whetherVipPopUp .cancel:hover{opacity:.9}.whetherVipPopUp .recharge{position:relative;border:none;color:#5f3f10;background:linear-gradient(135deg,#ffe294,#f2b62f);box-shadow:0 .428571rem 1rem rgba(224,165,45,.46),inset 0 .071429rem 0 hsla(0,0%,100%,.55)}.whetherVipPopUp .recharge:hover{transform:translateY(-.071429rem);box-shadow:0 .714286rem 1.428571rem rgba(224,165,45,.54),inset 0 .071429rem 0 hsla(0,0%,100%,.65)}.whetherVipPopUp.whetherVipPopUp--svip .recharge{color:#fff;background:linear-gradient(135deg,#bb92ea,#8a57d4);box-shadow:0 .428571rem 1rem rgba(130,85,200,.42),inset 0 .071429rem 0 hsla(0,0%,100%,.26)}.whetherVipPopUp.whetherVipPopUp--svip .recharge:hover{box-shadow:0 .714286rem 1.428571rem rgba(130,85,200,.5),inset 0 .071429rem 0 hsla(0,0%,100%,.34)}.whetherVipPopUp .limit-free-badge{position:absolute;top:-.642857rem;right:-.571429rem;padding:0 .428571rem;height:1.214286rem;line-height:1.214286rem;font-size:.714286rem;font-weight:600;color:#fff;background:linear-gradient(135deg,#ff7a45,#ff4d4f);border-radius:.571429rem .571429rem .571429rem 0;box-shadow:0 .142857rem .428571rem rgba(255,77,79,.4);pointer-events:none}.course-delivery-page{--brand-blue:#0878f9;--brand-blue-dark:#0067df;--brand-blue-soft:#eaf4ff;--orange:#ff9418;--orange-dark:#eb7d00;--pink:#f05b78;--ink:#1d2129;--muted:#86909c;--line:#e5e6eb;--surface:#fff;--page:#f7f8fa;--neutral-selected:#f2f3f5;--site-header-height:60PX;--filter-sticky-gap:24PX;--filter-mask-toolbar-half:32PX;--sidebar-sticky-top:calc(var(--site-header-height) + var(--filter-sticky-gap));--sidebar-bottom-gap:24PX;--lime:#e2f164;--lavender:#a5a3ff;--soft-pink:#eac5f8;--focus-ring:#80b9ff;--pressed-layer:rgba(29,33,41,0.09);font-family:PingFang SC,Microsoft YaHei,Arial,sans-serif;color:var(--ink);background:var(--page);font-synthesis:none;text-rendering:optimizeLegibility}.course-delivery-page *{box-sizing:border-box}.course-delivery-page html{background:var(--page);scroll-behavior:smooth}.course-delivery-page 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2PX;background:linear-gradient(135deg,#ff716b,#f24e61);box-shadow:none;color:#fff;font-size:9PX;font-weight:600;line-height:16PX;transform:none}.course-delivery-page .chevron{width:15PX;height:15PX;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s ease}.course-delivery-page .chevron.is-up,.course-delivery-page .nav-entry.is-open .chevron{transform:rotate(180deg)}.course-delivery-page .desktop-dropdown{position:absolute;top:54PX;left:50%;z-index:20;width:max-content;min-width:118PX;padding:5PX;visibility:hidden;border:1PX solid rgba(25,34,49,.06);border-radius:10PX;background:#fff;box-shadow:0 8PX 28PX rgba(35,50,80,.14);opacity:0;transform:translate(-50%,-8PX);transition:opacity .15s ease,transform .15s ease,visibility .15s ease}.course-delivery-page .desktop-dropdown:before{content:"";position:absolute;top:-11PX;right:0;left:0;height:12PX}.course-delivery-page .nav-entry.is-open .desktop-dropdown{visibility:visible;opacity:1;transform:translate(-50%)}.course-delivery-page .dropdown-item{width:100%;height:40PX;padding:0 14PX;display:block;border:0;border-radius:7PX;background:transparent;color:#333944;font-size:14PX;text-align:center;white-space:nowrap;cursor:pointer}@media (hover:hover){.course-delivery-page .dropdown-item:hover,.course-delivery-page .nav-trigger:hover{background:#f2f3f5;color:var(--ink)}.course-delivery-page .dropdown-item:hover{background:rgba(226,241,100,.42)}.course-delivery-page .nav-entry.is-active .nav-trigger:hover{background:#343943;color:#fff}}.course-delivery-page .desktop-utilities{min-width:244PX;height:60PX;margin-left:auto;display:flex;align-items:center;justify-content:flex-end;gap:10PX}.course-delivery-page .buddy-link{height:40PX;padding:3PX 8PX;display:flex;align-items:center;gap:2PX;border:1PX solid transparent;border-radius:12PX;background:transparent;cursor:pointer}.course-delivery-page .buddy-link 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.profile-button.is-guest.is-open{background:#343943}.course-delivery-page .guest-login-label,.course-delivery-page .profile-button__label{font-size:12PX;font-weight:650;white-space:nowrap}.course-delivery-page .profile-button__label{color:#343943}.course-delivery-page .avatar-mark{position:relative;width:40PX;height:40PX;display:grid;place-items:center;overflow:hidden;border:1PX solid rgba(29,33,41,.12);border-radius:50%;background:linear-gradient(155deg,#f3f8b9,#fff 50%,#edf2b1);color:var(--ink);font-size:9PX;font-weight:800}.course-delivery-page .avatar-mark:after,.course-delivery-page .avatar-mark:before{content:"";position:absolute;border-radius:50%;background:#dce76f}.course-delivery-page .avatar-mark:before{top:7PX;width:12PX;height:12PX}.course-delivery-page .avatar-mark:after{bottom:-4PX;width:27PX;height:18PX}.course-delivery-page .avatar-mark--guest{background:#f2f3f5;color:#5f6875}.course-delivery-page .avatar-mark--guest:after,.course-delivery-page .avatar-mark--guest:before{display:none}.course-delivery-page .avatar-mark--guest>svg{width:21PX;height:21PX;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.course-delivery-page .avatar-mark span{position:relative;z-index:1;margin-top:8PX}.course-delivery-page .profile-button>.chevron{width:12PX;color:#7d8795}.course-delivery-page .profile-menu-wrap{position:relative}.course-delivery-page .profile-menu{position:absolute;z-index:30;top:calc(100% + 9PX);right:0;width:238PX;padding:12PX;border:1PX solid rgba(29,33,41,.1);border-radius:16PX;background:#fff;box-shadow:0 18PX 46PX rgba(29,33,41,.16)}.course-delivery-page .profile-menu:before{content:"";position:absolute;top:-10PX;right:0;left:0;height:10PX}.course-delivery-page .profile-menu__summary{padding:2PX 2PX 12PX;display:grid;grid-template-columns:44PX minmax(0,1fr);align-items:center;gap:10PX}.course-delivery-page .avatar-mark--menu{width:44PX;height:44PX}.course-delivery-page .profile-menu__summary strong{display:block;color:var(--ink);font-size:14PX}.course-delivery-page .profile-menu__summary p{margin:3PX 0 0;color:var(--muted);font-size:11PX;line-height:16PX}.course-delivery-page .account-state-switch{padding:3PX;display:grid;grid-template-columns:1fr 1fr;gap:3PX;border-radius:10PX;background:#f2f3f5}.course-delivery-page .account-state-switch button{height:32PX;border:0;border-radius:8PX;background:transparent;color:#6b7585;font-size:12PX;font-weight:600;cursor:pointer}.course-delivery-page .account-state-switch button.is-active{background:var(--lime);box-shadow:0 2PX 8PX rgba(29,33,41,.08);color:var(--ink)}.course-delivery-page .profile-menu__actions{margin-top:8PX;display:grid;gap:2PX}.course-delivery-page .profile-menu__actions button{height:38PX;padding:0 10PX;border:0;border-radius:9PX;background:transparent;color:#343943;font-size:13PX;text-align:left;cursor:pointer}@media (hover:hover) and (pointer:fine){.course-delivery-page .profile-menu__actions button:hover{background:#f2f3f5}}.course-delivery-page .profile-login-button{width:100%;height:40PX;margin-top:10PX;border:0;border-radius:10PX;background:var(--ink);color:#fff;font-size:13PX;font-weight:650;cursor:pointer}.course-delivery-page .profile-menu-enter-active,.course-delivery-page .profile-menu-leave-active{transition:opacity .14s ease,transform .14s ease;transform-origin:top right}.course-delivery-page .profile-menu-enter,.course-delivery-page .profile-menu-leave-to{opacity:0;transform:translateY(-4PX) scale(.98)}.course-delivery-page .mobile-menu-wrap,.course-delivery-page .mobile-utilities{display:none}.course-delivery-page .page-content{padding:calc(var(--site-header-height) + var(--filter-sticky-gap)) 16PX 0;background:var(--page);overflow-anchor:none}:root:has(.course-delivery-page){scrollbar-gutter:stable}.course-delivery-page .course-layout{width:min(1050PX,100%);margin:0 auto;display:grid;grid-template-columns:216PX minmax(0,1fr);align-items:start;column-gap:18PX;row-gap:0}.course-delivery-page .course-layout:after{content:"";grid-column:1/-1;height:72PX;pointer-events:none}.course-delivery-page .delivery-course-main{min-width:0}.course-delivery-page .sr-only{position:absolute;width:1PX;height:1PX;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.course-delivery-page .course-sidebar{position:sticky;top:var(--sidebar-sticky-top);max-height:calc(100vh - var(--sidebar-sticky-top) - var(--sidebar-bottom-gap));max-height:calc(100dvh - var(--sidebar-sticky-top) - var(--sidebar-bottom-gap));padding:8PX;overflow-x:hidden;overflow-y:auto;border:0;border-radius:20PX;background:#fff;scrollbar-width:none;-ms-overflow-style:none;-webkit-overflow-scrolling:touch}.course-delivery-page .course-sidebar::-webkit-scrollbar{display:none;width:0;height:0}.course-delivery-page .sidebar-group+.sidebar-group{margin-top:2PX}.course-delivery-page .sidebar-title-row{position:relative;isolation:isolate;display:grid;grid-template-columns:minmax(0,1fr) 34PX;align-items:center;border-radius:12PX;color:#4e5969;transition:background-color .15s ease,color .15s ease,transform 90ms ease}.course-delivery-page .sidebar-title-row:after{content:"";position:absolute;z-index:0;inset:0;border-radius:inherit;background:var(--ink);opacity:0;pointer-events:none;transition:opacity .12s ease}.course-delivery-page .sidebar-title-row>button{position:relative;z-index:1;-webkit-tap-highlight-color:transparent}.course-delivery-page .sidebar-title-row:has(>.sidebar-subject:active){transform:none}.course-delivery-page .sidebar-title-row:has(>.sidebar-subject:active):after{opacity:.09}.course-delivery-page .sidebar-group.is-current .sidebar-title-row{color:var(--ink);font-weight:650}.course-delivery-page .sidebar-title-row.is-selected{background:var(--lime);color:var(--ink)}.course-delivery-page .sidebar-title-row 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