:root{font-family:Noto Sans SC,PingFang SC,sans-serif;color:#243b39;background:#f5f8f7;font-synthesis:none;--ink:#243b39;--muted:#758681;--green:#58b49b;--line:#e6eeeb;--cream:#fdfcf8}*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#f7faf8 0,#fff,#f8fbfa)}button,input{font:inherit}button{border:0;cursor:pointer;color:inherit;background:none}.app-shell{min-height:100vh;overflow:hidden}.topbar{height:76px;border-bottom:1px solid #e8efed;background:#ffffffc7;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);display:flex;align-items:center;padding:0 max(28px,calc((100vw - 1180px)/2));gap:70px;position:relative;z-index:3}.brand{display:flex;align-items:center;gap:11px;cursor:pointer;min-width:174px}.brand-mark{width:34px;height:34px;border-radius:11px;background:#e1f4ed;color:#55ac94;display:grid;place-items:center;font-size:21px;transform:rotate(-8deg)}.brand strong{display:block;color:#284c45;font-size:18px;line-height:1.2}.brand span{display:block;color:#a0aea9;font-size:14px;letter-spacing:1px;margin-top:3px}.topnav{display:flex;gap:28px;height:100%}.topnav button{display:flex;gap:8px;align-items:center;color:#899894;font-size:14px;position:relative}.topnav button.active{color:#357c6c;font-weight:700}.topnav button.active:after{content:"";position:absolute;bottom:0;left:5px;right:5px;height:3px;border-radius:3px;background:#71c3aa}.top-actions{margin-left:auto;display:flex;align-items:center;gap:14px}.icon-button{height:34px;width:34px;border-radius:10px;color:#85948f;display:grid;place-items:center}.icon-button:hover,.mobile-menu:hover{background:#eef6f3}.login-link{padding:8px 18px;border-radius:10px;color:#478f7d;font-size:14px;font-weight:700;background:#edf8f4}.profile{display:flex;align-items:center;gap:8px;color:#56726a;font-size:14px}.avatar{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#f5dbb9;color:#986e46;font-weight:800}.mobile-menu{display:none;color:#6d817a}.hero{height:340px;max-width:1180px;margin:0 auto;position:relative;display:flex;align-items:center;padding:0 5px}.hero-copy{position:relative;z-index:1;margin-top:-8px}.eyebrow,.section-kicker{display:flex;align-items:center;gap:6px;color:#62ad99;font-size:14px;letter-spacing:2px;font-weight:700;margin:0 0 14px}.hero h1{font-size:43px;line-height:1.25;letter-spacing:1px;margin:0;color:#284541;font-weight:700}.hero h1 em{font-style:normal;color:#57b49c}.hero-sub{color:#85928e;font-size:14px;line-height:2;margin:15px 0 16px}.hero-stats{display:flex;gap:12px;align-items:center;color:#9aa6a2;font-size:14px}.hero-stats strong{color:#559a87;font-size:14px}.dot{width:3px;height:3px;border-radius:50%;background:#bfd3cc}.hero-art{position:absolute;right:-30px;top:0;width:600px;height:100%;overflow:hidden}.sun{position:absolute;top:40px;right:136px;width:110px;height:110px;border-radius:50%;background:#f9dda4;opacity:.72}.cloud{position:absolute;background:#fff;border-radius:40px;opacity:.75;width:100px;height:24px}.cloud:before,.cloud:after{content:"";position:absolute;background:#fff;border-radius:50%}.cloud:before{width:43px;height:43px;left:18px;top:-21px}.cloud:after{width:30px;height:30px;right:15px;top:-13px}.cloud-one{top:61px;right:365px}.cloud-two{top:122px;right:54px;transform:scale(.7)}.hill{position:absolute;border-radius:50% 50% 0 0}.hill-back{background:#d8eee4;width:570px;height:180px;bottom:-84px;right:-72px;transform:rotate(-4deg)}.hill-front{background:#bfe4d5;width:510px;height:145px;bottom:-69px;right:105px;transform:rotate(5deg)}.kid{position:absolute;right:191px;bottom:41px;width:100px;height:153px;z-index:1;transform:rotate(-4deg)}.kid-head{position:absolute;width:68px;height:68px;background:#f4c49f;border:5px solid #5d473b;border-radius:47% 50% 48% 48%;left:17px;top:0}.kid-head:after{content:"";position:absolute;width:78px;height:34px;background:#5d473b;border-radius:50% 45% 20% 20%;top:-10px;left:-8px;transform:rotate(-7deg)}.kid-body{position:absolute;top:65px;left:9px;width:82px;height:70px;background:#82c9b1;border:4px solid #3b8977;border-radius:31px 31px 20px 20px}.kid-body:after{content:"★";color:#f9d774;position:absolute;font-size:25px;left:28px;top:19px}.kid-leg{position:absolute;top:122px;width:18px;height:43px;background:#f4c49f;border:4px solid #5d473b;border-radius:10px}.kid-leg.l{left:25px;transform:rotate(6deg)}.kid-leg.r{right:16px;transform:rotate(-16deg)}.book-float{position:absolute;right:72px;bottom:75px;font-size:50px;transform:rotate(11deg);filter:drop-shadow(0 8px 5px #8dbfae)}.star-float{position:absolute;top:42px;right:38px;color:#f2c86a;font-size:32px}.content{max-width:1180px;margin:0 auto;padding:21px 5px 39px}.section-heading{display:flex;justify-content:space-between;align-items:end}.section-heading h2{font-size:25px;letter-spacing:.5px;color:#2f4642;margin:0 0 7px}.section-heading p:not(.section-kicker){font-size:14px;color:#94a09d;margin:0}.search-box{height:40px;width:218px;border:1px solid #e4ece9;background:#fff;border-radius:12px;display:flex;align-items:center;gap:8px;padding:0 12px;color:#a8b5b0;margin-bottom:4px}.search-box input{border:0;outline:0;width:100%;background:transparent;color:var(--ink);font-size:14px}.grade-tabs{display:flex;gap:8px;margin:27px 0 17px;overflow:auto;padding-bottom:3px}.grade-tabs button{padding:9px 17px;border-radius:9px;color:#82928c;font-size:14px;white-space:nowrap}.grade-tabs button:hover{background:#f0f6f3}.grade-tabs button.selected{color:#fff;background:#60b99f;box-shadow:0 5px 15px #8acdbb5c}.new-pill{font-size:14px;letter-spacing:.4px;background:#f3c96e;color:#6c5a2c;padding:3px 5px;border-radius:4px;margin-left:6px;vertical-align:2px}.course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.course-card{background:#fff;border:1px solid #e8efed;border-radius:14px;overflow:hidden;box-shadow:0 7px 20px #658f7a0d;cursor:pointer;transition:transform .2s,box-shadow .2s}.course-card:hover{transform:translateY(-4px);box-shadow:0 14px 28px #658f7a1c}.card-art{height:130px;position:relative;overflow:hidden}.card-art:before{content:"";position:absolute;width:150px;height:150px;right:-27px;top:22px;border-radius:50%;border:18px solid #ffffff36}.card-art:after{content:"";position:absolute;width:85px;height:85px;right:25px;top:43px;border-radius:50%;border:10px solid #ffffff36}.mint .card-art,.course-cover.mint{background:#a8dac7}.blue .card-art,.course-cover.blue{background:#a9d9ec}.yellow .card-art,.course-cover.yellow{background:#f0d48e}.purple .card-art,.course-cover.purple{background:#c9b6da}.card-badge{position:absolute;left:15px;top:15px;background:#ffffff8a;padding:5px 8px;border-radius:6px;color:#407b6d;font-size:14px;z-index:1}.blue .card-badge{color:#41768a}.yellow .card-badge{color:#947636}.purple .card-badge{color:#675281}.card-symbol{position:absolute;left:28px;bottom:-12px;font-size:76px;font-weight:800;color:#ffffffc9;line-height:1;z-index:1;text-shadow:2px 3px #ffffff35}.card-spark{position:absolute;left:117px;top:57px;color:#fff6c6;font-size:22px}.card-wave{position:absolute;bottom:-42px;right:55px;width:190px;height:90px;border-radius:50%;border:13px solid #ffffff38;transform:rotate(-17deg)}.card-body{padding:14px 15px 13px}.card-title-row{display:flex;justify-content:space-between;gap:6px}.card-title-row h3{font-size:15px;margin:0 0 4px;color:#304945}.card-title-row p{font-size:14px;color:#91a09b;margin:0;white-space:nowrap}.arrow{width:25px;height:25px;display:grid;place-items:center;border-radius:50%;background:#f0f6f3;color:#69ab98;flex:0 0 auto}.card-meta{display:flex;gap:11px;border-top:1px solid #eef2f0;margin-top:13px;padding-top:10px;color:#9ba9a5;font-size:14px}.card-meta span{display:flex;align-items:center;gap:4px}.progress-row{display:flex;align-items:center;gap:8px;margin-top:10px}.progress{height:4px;background:#edf1ef;border-radius:8px;flex:1;overflow:hidden}.progress span{height:100%;display:block;border-radius:8px;background:#60b99f}.progress-row b{font-size:14px;color:#62ac98}.empty{padding:38px;text-align:center;color:#91a09b}.continue-strip{max-width:1180px;margin:0 auto 40px;border:1px solid #e6eeeb;border-radius:14px;background:#fdfcf8;min-height:96px;display:flex;align-items:center;padding:17px 23px;position:relative;overflow:hidden}.continue-icon{width:53px;height:53px;border-radius:16px;background:#d9efe7;color:#5eb59e;display:grid;place-items:center;margin-right:15px}.continue-text p{color:#67ae9a;font-size:14px;letter-spacing:1px;margin:0 0 3px}.continue-text h3{font-size:14px;margin:0 0 5px;color:#354c47}.continue-text span{color:#9ba7a3;font-size:14px}.continue-strip>button{margin-left:auto;display:flex;align-items:center;gap:7px;color:#4f9e89;background:#eaf6f1;font-size:14px;font-weight:700;padding:11px 16px;border-radius:9px;position:relative;z-index:1}.strip-stars{color:#f1d483;font-size:26px;position:absolute;right:25px;top:15px;opacity:.65;letter-spacing:10px}footer{height:62px;border-top:1px solid #e7eeec;max-width:1180px;margin:auto;display:flex;align-items:center;justify-content:space-between;color:#a3afab;font-size:14px}footer .footer-links{display:flex;gap:22px}footer button{font-size:14px;color:#8c9b96}.toast{position:fixed;right:24px;bottom:22px;background:#294842;color:#fff;padding:12px 17px;border-radius:11px;box-shadow:0 10px 30px #213f392c;font-size:14px;z-index:20;animation:pop .2s ease-out}@keyframes pop{0%{transform:translateY(8px);opacity:0}to{transform:none;opacity:1}}.course-overlay{position:fixed;inset:0;background:#f7faf8;z-index:10;overflow:auto}.course-panel{max-width:1040px;margin:0 auto;padding:24px 22px 45px}.course-panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}.course-panel-header button{display:flex;align-items:center;gap:5px;color:#6f8e83;font-size:14px}.back-icon{transform:rotate(180deg)}.course-panel-header>span{color:#74b7a2;font-size:14px;letter-spacing:1px}.course-intro{display:flex;gap:22px;align-items:center;margin-bottom:29px}.course-cover{width:155px;height:125px;border-radius:14px;position:relative;overflow:hidden;flex:0 0 auto}.course-cover .card-symbol{font-size:86px;bottom:-9px}.course-cover>span{position:absolute;top:14px;right:13px;padding:4px 8px;border-radius:6px;background:#fff8;color:#fff;font-size:14px}.course-intro h2{font-size:28px;margin:1px 0 8px;color:#2e4943}.course-intro>div:last-child>p:not(.section-kicker){font-size:14px;color:#899b94;margin:0;line-height:1.8}.course-summary{display:flex;gap:20px;margin-top:13px;color:#65a58f;font-size:14px}.course-summary span{display:flex;align-items:center;gap:5px}.lesson-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:28px}.lesson-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.lesson-heading h3{font-size:16px;color:#36504a;margin:0}.lesson-heading span{font-size:14px;color:#9aa7a2}.lesson-list{background:#fff;border:1px solid #e7efec;border-radius:13px;overflow:hidden}.lesson-row{width:100%;display:flex;align-items:center;gap:11px;text-align:left;border-bottom:1px solid #edf2f0;padding:12px 14px;transition:background .15s}.lesson-row:last-child{border-bottom:0}.lesson-row:hover,.lesson-row.active{background:#f1f8f5}.lesson-number{width:29px;height:29px;border-radius:9px;background:#eff5f2;color:#7da69a;display:grid;place-items:center;font-size:14px;font-weight:700;flex:0 0 auto}.lesson-row.active .lesson-number{background:#cfeee2;color:#4a9c85}.lesson-main{display:flex;flex-direction:column;flex:1;gap:4px}.lesson-main strong{font-size:14px;color:#405650;font-weight:600}.lesson-main small{font-size:14px;color:#a1ada9}.lesson-duration{font-size:14px;color:#9daaa6}.play-small{width:25px;height:25px;display:grid;place-items:center;border-radius:50%;background:#f1f7f4;color:#70b29e}.lesson-row.active .play-small{background:#64b99f;color:#fff}.player-side{min-height:490px}.audio-player,.player-placeholder{background:#fff;border:1px solid #e7efec;border-radius:15px;min-height:490px;padding:27px 32px;text-align:center;position:relative;box-shadow:0 10px 30px #6089790b}.player-placeholder{display:flex;align-items:center;flex-direction:column;justify-content:center;color:#a1b2ac}.player-placeholder svg{color:#78bba5;margin-bottom:14px}.player-placeholder h3{margin:0 0 6px;font-size:15px;color:#668077}.player-placeholder p{font-size:14px;margin:0}.record{height:142px;width:142px;border-radius:50%;background:#b5e1d1;border:10px solid #dff3eb;display:grid;place-items:center;margin:0 auto 14px;box-shadow:0 10px 25px #65b69b2c;position:relative}.record.spinning{animation:spin 4s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.record-center{height:54px;width:54px;border:2px dashed #65ad99;border-radius:50%;display:grid;place-items:center;color:#5fab94;background:#dbf2e9}.record-lines{position:absolute;inset:19px;border:1px solid #ffffff80;border-radius:50%}.record-lines:after{content:"";position:absolute;inset:13px;border:1px solid #ffffff80;border-radius:50%}.now-playing{font-size:14px;letter-spacing:1px;color:#73b19f;margin:0 0 5px}.audio-player h3{font-size:18px;color:#35504a;margin:0}.player-note{font-size:14px;color:#9ba9a4;margin:7px 0 15px}.waveform{height:43px;display:flex;justify-content:center;align-items:center;gap:3px;margin:0 2px 11px}.waveform i{width:3px;border-radius:4px;background:#8dccb7;opacity:.75}.player-progress{display:flex;align-items:center;gap:7px;color:#9ca9a5;font-size:14px}.player-progress input{--value:0%;flex:1;height:4px;appearance:none;background:linear-gradient(90deg,#66b89e var(--value),#e7efec var(--value));border-radius:3px;outline:none}.player-progress input::-webkit-slider-thumb{appearance:none;width:12px;height:12px;border-radius:50%;background:#65b79e;border:2px solid white;box-shadow:0 0 0 1px #65b79e}.player-controls{display:flex;align-items:center;justify-content:center;gap:24px;margin:15px 0}.player-controls>button{color:#729189;font-size:23px;line-height:1}.play-large{width:47px;height:47px;border-radius:50%;display:grid;place-items:center;background:#61b79d;color:#fff;box-shadow:0 7px 15px #65b79e4d}.speed-row{display:flex;align-items:center;justify-content:center;gap:6px;color:#9ba8a4;font-size:14px}.speed-row button{font-size:14px;padding:4px 6px;border-radius:5px;color:#8c9c96}.speed-row button.chosen{background:#e4f4ee;color:#5aa58f;font-weight:700}.save-hint{position:absolute;bottom:15px;left:50%;transform:translate(-50%);font-size:14px;color:#84a299;display:flex;align-items:center;gap:4px;white-space:nowrap}.celebrate{position:absolute;bottom:45px;left:50%;transform:translate(-50%);background:#fff8da;color:#99752f;padding:7px 12px;border-radius:8px;font-size:14px}.modal-backdrop{position:fixed;inset:0;background:#26443f43;z-index:30;display:grid;place-items:center;padding:20px}.login-modal{width:360px;background:#fff;border-radius:17px;padding:31px 34px 27px;position:relative;box-shadow:0 20px 60px #263d382b;text-align:center}.modal-close{position:absolute;right:15px;top:14px;color:#9eaaa6}.login-icon{height:46px;width:46px;display:grid;place-items:center;margin:0 auto 14px;border-radius:14px;background:#def3eb;color:#60b49b;font-size:25px}.login-modal h2{font-size:22px;color:#304c46;margin:0 0 7px}.login-modal>p:not(.section-kicker){font-size:14px;color:#91a09b;margin:0 0 24px}.login-modal form{text-align:left}.login-modal label{display:block;font-size:14px;color:#70817a;margin:0 0 13px}.login-modal input{width:100%;height:41px;border:1px solid #e4ece9;border-radius:8px;margin-top:6px;padding:0 11px;outline:0;font-size:14px;color:#36504a}.login-modal input:focus{border-color:#7bc4ae;box-shadow:0 0 0 3px #e0f5ed}.submit-button{width:100%;height:43px;background:#61b79e;border-radius:9px;color:#fff;font-weight:700;font-size:14px;margin-top:4px}.login-modal small{display:block;color:#a1ada9;font-size:14px;margin-top:17px}@media(max-width:900px){.topbar{padding:0 22px;gap:20px}.topnav{display:none}.mobile-menu{display:grid;place-items:center}.hero,.content,.continue-strip,footer{margin-left:22px;margin-right:22px}.hero-art{right:-170px;opacity:.75}.course-grid{grid-template-columns:repeat(2,1fr)}.hero{height:330px}.lesson-layout{grid-template-columns:1fr}.player-side{min-height:0}.player-placeholder,.audio-player{min-height:420px}.course-panel{padding:18px 18px 36px}}@media(max-width:560px){.brand{min-width:0}.brand span,.icon-button,.profile span:not(.avatar){display:none}.hero{height:350px;margin-left:18px;margin-right:18px}.hero h1{font-size:36px}.hero-art{right:-275px;opacity:.55}.hero-stats{display:block;line-height:2}.hero-stats .dot{display:none}.content,.continue-strip,footer{margin-left:18px;margin-right:18px}.section-heading{display:block}.search-box{width:100%;margin-top:18px}.course-grid{grid-template-columns:1fr}.grade-tabs{margin-top:18px}.continue-strip{padding:15px;align-items:flex-start}.continue-strip>button{position:absolute;right:13px;bottom:14px}.continue-text{padding-right:20px}.continue-text span{display:block;max-width:180px}.strip-stars{display:none}footer{height:auto;padding:20px 0;display:block;line-height:2}.footer-links{margin-top:7px}.course-intro{align-items:flex-start}.course-cover{width:105px;height:90px}.course-cover .card-symbol{font-size:65px}.course-intro h2{font-size:22px}.course-intro>div:last-child>p:not(.section-kicker){font-size:14px}.course-summary{display:block;line-height:2}.course-summary span{display:inline-flex;margin-right:10px}.lesson-layout{gap:16px}.audio-player,.player-placeholder{padding:25px 17px}.login-modal{width:min(360px,100%);padding-left:24px;padding-right:24px}}:root{font-family:Microsoft YaHei,PingFang SC,sans-serif;font-size:16px;--muted:#647970}body{line-height:1.7}button{touch-action:manipulation}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible{outline:3px solid #87cbb6;outline-offset:3px}h1,h2,h3,p{overflow-wrap:anywhere}input,select,textarea{min-width:0;max-width:100%;font:inherit;font-size:16px;color:#304a42}input:not([type=range]):not([type=checkbox]),select,textarea{width:100%;border:1px solid #ceddd6;border-radius:9px;background:#fff;padding:10px 12px;outline:none}input:focus,select:focus,textarea:focus{border-color:#68b69d;box-shadow:0 0 0 3px #e3f5ed}label{display:block;font-size:16px;color:#486258;margin-bottom:16px}label input,label select,label textarea{margin-top:6px}a{color:#297d64;text-decoration:none}a:hover{text-decoration:underline}.topbar{height:auto;min-height:84px;gap:30px;padding:12px max(24px,calc((100vw - 1240px)/2));flex-wrap:wrap}.brand{text-align:left}.brand strong{font-size:23px}.brand span{font-size:13px}.topnav{gap:24px;min-height:46px}.topnav button{font-size:16px;white-space:nowrap}.top-actions{gap:12px}.profile{font-size:16px}.icon-button{width:44px;height:44px;display:grid!important;place-items:center}.login-link{font-size:16px;padding:10px 18px}.avatar{height:38px;width:38px;font-size:18px}.hero,.content,.continue-strip,footer{max-width:1240px}.hero{height:365px;padding:0 18px}.hero h1{font-size:48px}.hero-sub{font-size:18px;color:#62796e;line-height:1.9}.hero-stats{font-size:15px;color:#62796e}.hero-stats strong{font-size:17px}.eyebrow,.section-kicker{font-size:14px;letter-spacing:1.4px}.content{padding:30px 18px 38px}.section-heading h2{font-size:30px}.section-heading p:not(.section-kicker){font-size:16px;color:#657c70}.search-box{width:300px;height:48px;margin:0;background:#fff}.search-box input{font-size:16px!important;border:0!important;padding:0!important;box-shadow:none!important;background:transparent!important}.search-box>span{font-size:28px;color:#7aa290}.grade-tabs{margin:24px 0 10px}.grade-tabs button{font-size:17px;min-height:46px;color:#546f62}.course-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.course-card{padding:0;text-align:left;min-width:0}.card-art{height:160px}.card-art>img,.course-cover>img{width:100%;height:100%;object-fit:cover}.card-badge{font-size:14px;background:#ffffffd9;color:#285e4c}.card-body{padding:20px}.card-title-row>div{min-width:0}.card-title-row h3{font-size:22px}.card-title-row p{font-size:16px;line-height:1.7;white-space:normal;color:#667e72;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.card-meta{font-size:15px;color:#667d71;gap:20px}.card-meta span{white-space:nowrap}.arrow{height:32px;width:32px}.progress-row b{font-size:14px}.progress{height:6px}.continue-strip{margin:0 auto 40px;padding:23px 24px;gap:10px}.continue-text p{font-size:14px}.continue-text h3{font-size:19px}.continue-text span{font-size:16px;color:#657c70}.continue-strip>button{font-size:16px;flex-shrink:0}.continue-icon{flex-shrink:0}.announcement{max-width:1204px;margin:0 auto;background:#eaf5ef;border:1px solid #dcece3;padding:12px 18px;border-radius:12px;color:#477a61;display:flex;align-items:center;gap:10px;font-size:16px}.announcement svg{flex-shrink:0}footer{padding:20px 18px;height:auto;min-height:80px;font-size:14px;color:#697f72;gap:20px}footer button{font-size:14px;color:#53715f;display:flex;align-items:center;gap:5px}.course-panel{max-width:1240px;padding:30px 24px 50px}.course-panel-header button,.course-panel-header>span{font-size:16px}.course-intro h2{font-size:32px}.course-intro>div:last-child>p:not(.section-kicker){font-size:17px;color:#667d71}.course-cover{height:148px;width:185px}.course-cover>span{font-size:14px;color:#255e4d}.course-summary{font-size:16px;flex-wrap:wrap;color:#427a5d}.lesson-layout{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);align-items:start;gap:28px}.lesson-heading h3{font-size:22px}.lesson-heading span{font-size:16px;color:#62796d}.lesson-row{padding:18px 16px;gap:13px;min-width:0}.lesson-main{min-width:0}.lesson-main strong{font-size:18px}.lesson-main small{font-size:14px;color:#62796d}.lesson-number{width:34px;height:34px;font-size:15px}.lesson-duration{font-size:15px;color:#667e71}.play-small{width:34px;height:34px;flex-shrink:0}.player-side{position:sticky;top:22px}.audio-player,.player-placeholder{padding:30px;min-height:570px}.audio-player h3{font-size:25px}.player-note{font-size:16px;color:#617b6d}.now-playing{font-size:15px}.player-progress{font-size:15px;color:#5c776a}.player-progress input{min-width:50px}.speed-row{font-size:15px;flex-wrap:wrap}.speed-row button{font-size:16px;padding:6px 9px}.player-controls{margin:20px 0}.player-controls>button{color:#34795f}.player-controls .play-large{height:56px;width:56px;color:#fff}.episode-navigation{display:flex;justify-content:space-between;margin:20px 0}.episode-navigation button{display:flex;align-items:center;gap:6px;font-size:16px;padding:6px;border-radius:8px;color:#3c7d60}.achievement{background:#fff2c9;color:#89691f;border-radius:10px;padding:10px;margin-top:15px;font-size:16px}.waveform.moving i{animation:sound .8s ease-in-out infinite alternate}@keyframes sound{to{transform:scaleY(.4)}}.video-player{width:100%;max-height:300px;border-radius:10px;background:#183b30}.attachments{margin-top:22px}.attachments a{display:flex;align-items:center;gap:8px;overflow-wrap:anywhere;padding:8px 0}.player-placeholder h3{font-size:21px}.player-placeholder p{font-size:16px}.page-section{max-width:1240px;margin:0 auto;padding:34px 24px 60px;min-height:70vh}.page-section h1{font-size:32px;margin:0}.page-section h2{font-size:23px;margin:0 0 15px}.page-section h3{font-size:20px;margin:0 0 10px}.page-description{font-size:17px;color:#607b6b;margin:10px 0 28px}.panel{background:#fff;border:1px solid #dce8e0;border-radius:15px;padding:25px;box-shadow:0 8px 25px #41755a05;min-width:0}.account-grid,.resource-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.primary-button,.secondary-button{display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px 17px;border-radius:9px;font-size:16px;line-height:1.5;font-weight:600}.primary-button{background:#439f7c;color:#fff}.primary-button:hover{background:#368a6a}.secondary-button{border:1px solid #cddfd3;background:#fff;color:#357657}.text-link{font-size:16px;color:#358062;padding:6px 0}.muted{color:#60796b;font-size:15px;line-height:1.8}.form-error{border:1px solid #e8c6c4;border-radius:9px;background:#fff2f0;padding:11px 14px;color:#a03731;font-size:16px;line-height:1.7}.error-banner{margin:18px auto;max-width:1200px;padding:14px 18px;border-radius:10px;background:#ffebe7;color:#9c342e;display:flex;justify-content:space-between;gap:12px}.error-banner button{font-weight:700}.modal-backdrop{overflow:auto;padding:24px}.login-modal{width:480px;max-width:100%;max-height:calc(100dvh - 48px);overflow:auto;padding:32px;text-align:center}.login-modal h2{font-size:27px}.login-modal>p:not(.section-kicker){font-size:16px;color:#607a6b;margin:10px 0 18px}.login-modal label{font-size:16px;color:#486258;margin-bottom:14px}.login-modal input{font-size:16px!important;height:auto;min-height:44px}.login-modal small{font-size:14px;color:#657d70}.login-modal .submit-button{font-size:17px;min-height:48px}.modal-close{height:36px;width:36px;display:grid;place-items:center}.segmented{display:flex;padding:5px;background:#eff5f1;border-radius:10px;margin-bottom:20px;gap:5px}.segmented button{flex:1;padding:8px;font-size:16px;border-radius:8px;color:#577b62}.segmented .selected{background:#fff;color:#28805d;box-shadow:0 2px 8px #28704418}.checkbox-label{display:flex;align-items:center;gap:9px;font-size:16px!important}.checkbox-label input{width:19px!important;height:19px!important;min-height:0!important;margin:0;flex-shrink:0}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.form-grid label{min-width:0}.summary-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px;margin-bottom:26px}.summary-cards>div{border:1px solid #dce9e0;background:#fff;border-radius:14px;padding:23px;display:flex;flex-direction:column;gap:8px}.summary-cards strong{font-size:34px;color:#3b8a67;line-height:1.4}.summary-cards span{font-size:16px;color:#5d7968}.history-list{display:grid;gap:16px}.history-row{display:flex;align-items:center;justify-content:space-between;gap:20px}.history-row h3{font-size:19px}.history-row p{font-size:15px;color:#657d6e;margin:0}.history-row .primary-button{white-space:nowrap}.admin-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.admin-tabs{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 26px;padding:8px;background:#edf4ef;border:1px solid #e0ebe3;border-radius:12px}.admin-tabs button{display:flex;align-items:center;gap:7px;white-space:nowrap;font-size:16px;padding:9px 11px;border-radius:8px;color:#52745c}.admin-tabs button.selected{color:#fff;background:#469d75;box-shadow:0 4px 10px #48947220}.quick-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.quick-actions button{display:flex;align-items:center;gap:12px;padding:18px;background:#f2f8f4;border-radius:11px;font-size:17px;text-align:left;color:#3d7452}.quick-actions svg{flex-shrink:0}.database-status{display:flex;align-items:flex-start;gap:10px;font-size:16px;line-height:1.8;background:#f2f8f5;padding:16px;margin:24px 0 0;border-radius:10px;color:#46745a}.database-status svg{flex-shrink:0;margin-top:5px}.toolbar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px;margin-bottom:20px}.toolbar h2{margin:5px 0}.table-wrap{width:100%;overflow:auto;border:1px solid #dbe7df;border-radius:12px;background:#fff}table{border-collapse:collapse;width:100%;min-width:730px;font-size:16px;text-align:left}th{background:#eef5f0;color:#456b50;font-weight:600;white-space:nowrap}td,th{padding:16px;border-bottom:1px solid #e4ece7;vertical-align:middle}tbody tr:last-child td{border-bottom:0}td small{display:block;font-size:14px;color:#677e6d;margin-top:4px}td strong{font-size:17px;font-weight:600}.row-actions{display:flex;flex-wrap:wrap;gap:8px}.row-actions button,.row-actions a{display:inline-flex;align-items:center;gap:5px;padding:7px 10px;border-radius:7px;background:#eef7f1;color:#317a51;font-size:15px;white-space:nowrap}.row-actions .secondary-button{font-size:16px;padding:9px 14px;border:1px solid #d2e3d8}.status-pill{display:inline-flex;padding:3px 9px;border-radius:7px;font-size:14px;background:#eff1ed;color:#69776a;white-space:nowrap}.status-pill.good{background:#e2f3e9;color:#24764e}.status-pill.bad{background:#ffeae7;color:#ab4137}.admin-modal{width:570px;max-width:100%;max-height:calc(100dvh - 48px);overflow:auto;position:relative;background:#fff;border-radius:16px;padding:30px}.admin-modal h2{margin:0 0 22px;font-size:25px}.admin-modal .primary-button{width:100%}.change-list{display:grid;gap:20px}.change-list h2{margin-top:10px}.change-list p{white-space:pre-wrap;font-size:17px}.change-list small{font-size:14px;color:#617963}.settings-panel{max-width:700px}.cover-preview{width:100%;max-width:240px;height:150px;object-fit:cover;border-radius:10px;margin-bottom:15px}.attachment-row{display:flex;align-items:center;gap:12px;justify-content:space-between;margin-bottom:12px}.attachment-row a{display:flex;align-items:center;gap:6px;overflow-wrap:anywhere;min-width:0}.attachment-row button{font-size:15px;color:#ac5146;white-space:nowrap}.order-input{max-width:95px!important}.upload-progress{display:flex;align-items:center;gap:10px;margin:14px 0;font-size:15px}.upload-progress progress{height:12px;flex:1;accent-color:#469b73}.subheading{margin:30px 0 14px!important}.loading-text{color:#638473}.toast{font-size:16px;max-width:calc(100vw - 40px);bottom:24px;right:20px;z-index:50}.media-tabs{display:flex;gap:10px;margin:4px 0 20px}.media-tabs button{font-size:15px;color:#5f7a67;padding:6px 12px;border-radius:8px}.media-tabs .selected{background:#e3f2e9;color:#27794f}@media(max-width:1100px){.topbar,.topnav{gap:15px}.brand{min-width:140px}.hero,.content,.continue-strip,.announcement,footer{margin-left:24px;margin-right:24px}.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.card-title-row p{white-space:normal}.quick-actions{grid-template-columns:1fr}.topnav{display:flex}}@media(max-width:850px){.topbar{padding:12px 20px;gap:8px}.top-actions{margin-left:auto}.topnav{order:3;flex-basis:100%;justify-content:center;gap:22px;overflow:auto;display:flex}.hero{height:360px;padding:0}.hero h1{font-size:43px}.hero-art{right:-205px;opacity:.6}.hero-sub{font-size:17px}.hero-copy{max-width:100%}.section-heading{gap:20px;align-items:flex-start}.section-heading h2{font-size:27px}.search-box{width:260px;max-width:100%}.lesson-layout{grid-template-columns:1fr}.player-side{position:static;grid-row:1}.audio-player,.player-placeholder{min-height:0;padding:28px}.player-placeholder{min-height:190px}.account-grid,.resource-grid{grid-template-columns:1fr}.summary-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-tabs{flex-wrap:nowrap;overflow:auto}.admin-tabs button{flex-shrink:0}.announcement{margin-top:5px}.continue-strip{position:static;min-height:135px}.continue-strip>button{position:static}.continue-text span{max-width:none}.hero-stats{display:flex;font-size:14px}.hero-stats strong{font-size:16px}.profile span:not(.avatar){display:none}}@media(max-width:560px){.topbar{padding:10px 16px}.topnav{gap:12px;justify-content:flex-start;min-height:42px}.topnav button{font-size:15px}.brand span{display:none}.brand strong{font-size:22px}.login-link{padding:8px 13px;font-size:15px}.hero,.content,.continue-strip,.announcement,footer{margin-left:16px;margin-right:16px}.hero{height:350px}.hero h1{font-size:38px}.hero-art{right:-300px;opacity:.4}.hero-sub{font-size:17px}.hero-stats{flex-wrap:wrap;gap:10px}.section-heading{display:block}.section-heading h2{font-size:27px}.search-box{width:100%;margin-top:18px}.grade-tabs{margin-top:20px}.grade-tabs button{font-size:16px;padding:9px 14px}.course-grid{grid-template-columns:1fr;gap:18px}.card-art{height:160px}.content{padding:24px 0}.continue-strip{flex-wrap:wrap;padding:18px;gap:12px}.continue-icon{margin-right:0}.continue-text{padding-right:0;flex:1;min-width:170px}.continue-text h3{font-size:18px}.continue-strip>button{margin-left:auto;position:static;font-size:16px}.announcement{font-size:15px;padding:12px}.course-panel{padding:24px 16px}.course-panel-header{flex-wrap:wrap;gap:12px}.course-intro{gap:14px;flex-direction:column}.course-cover{width:100%;height:150px}.course-intro h2{font-size:28px}.course-intro>div:last-child>p:not(.section-kicker){font-size:16px}.course-summary{display:flex;font-size:15px;gap:10px}.lesson-row{padding:15px 10px;gap:8px}.lesson-main strong{font-size:17px}.lesson-main small,.lesson-duration{font-size:14px}.lesson-number{height:29px;width:29px;flex-shrink:0}.play-small{height:29px;width:29px}.audio-player{padding:25px 18px}.player-note{font-size:15px}.player-progress{font-size:14px}.player-progress input{min-width:30px}.speed-row{gap:5px;font-size:14px}.speed-row button{font-size:15px;padding:7px}.page-section{padding:26px 16px 40px}.page-section h1{font-size:29px}.page-description{font-size:16px}.panel{padding:20px}.history-row{display:block}.history-row .primary-button{margin-top:15px}.summary-cards{gap:12px}.summary-cards>div{padding:18px}.summary-cards strong{font-size:30px}.summary-cards span{font-size:15px}.admin-heading{align-items:flex-start;gap:12px}.admin-heading .secondary-button{padding:9px 12px;flex-shrink:0}.admin-tabs{margin-bottom:20px;padding:6px}.admin-tabs button{font-size:15px}.toolbar>.search-box{margin-top:0}.toolbar h2{font-size:21px}.admin-modal,.login-modal{padding:27px 20px;width:100%;max-height:calc(100dvh - 32px)}.modal-backdrop{padding:16px}.login-modal h2{font-size:25px}.form-grid{grid-template-columns:1fr;gap:0}.profile .avatar{display:grid}footer{display:flex;flex-wrap:wrap;gap:10px;font-size:14px}footer .footer-links{gap:20px;margin:0}.toast{font-size:15px}}.embedded-player{padding:22px!important}.embedded-heading{margin-bottom:16px}.embedded-heading h3{margin:7px 0 4px;font-size:24px}.embedded-heading p{margin:0;color:#6b8178;font-size:15px}.embedded-badge{display:inline-flex;padding:4px 10px;border-radius:999px;background:#eee7fb;color:#725ba2;font-size:14px;font-weight:700}.embedded-player iframe{display:block;width:100%;height:580px;border:1px solid #dce7e1;border-radius:12px;background:#f7faf8}.embedded-link{display:inline-block;margin-top:13px;font-size:15px;color:#3d8b6b}.embedded-player .episode-navigation{margin-bottom:0}@media(max-width:560px){.embedded-player{padding:16px!important}.embedded-player iframe{height:68vh;min-height:460px}.embedded-heading h3{font-size:21px}}:root{--ink:#294640;--green:#58b89f}body{background:#fff;color:var(--ink)}*{letter-spacing:0}.topbar{height:74px;min-height:74px;padding:0 max(24px,calc((100% - 1200px)/2));gap:68px;flex-wrap:nowrap;background:#fff;-webkit-backdrop-filter:none;backdrop-filter:none}.brand{min-width:182px;padding:0;gap:12px}.brand-mark{width:36px;height:36px;border-radius:12px;background:#e0f4ed}.brand strong{font-size:23px;font-weight:600}.brand span{font-size:12px;color:#8d9e97;margin-top:3px}.topnav{height:auto;align-self:stretch;gap:36px}.topnav button{font-size:16px;padding:0 2px;color:#7b9087}.topnav button.active{color:#258873;font-weight:600}.topnav button.active:after{left:0;right:0;background:#6cc5ab}.top-actions{gap:14px}.login-link{border-radius:8px;background:#edf8f4;color:#348b75;padding:9px 20px;font-size:16px}.filter-toggle{color:#8b9e96}.filter-toggle.active{background:#e5f5ee;color:#27886d}.learning-home{background:linear-gradient(180deg,#f7faf8 0,#fff 470px 100%)}.learning-home .hero{width:calc(100% - 48px);max-width:1200px;height:340px;margin:0 auto;padding:0}.hero-copy{margin-top:0}.hero .eyebrow{font-size:14px;gap:6px;margin-bottom:16px}.hero h1{font-size:46px;line-height:1.3;font-weight:700}.hero h1 em{color:#53b59d}.hero-sub{font-size:16px;color:#7c8e85;line-height:1.9;margin:18px 0}.hero-stats{font-size:14px;color:#8a9e95;gap:12px}.hero-stats strong{font-size:14px;color:#398f78}.hero-art{width:600px;height:340px;right:-35px;top:auto;bottom:0;opacity:1}.hero-art img{display:block;width:100%;height:100%;object-fit:contain}.learning-home .content{width:calc(100% - 48px);max-width:1200px;margin:0 auto;padding:25px 0 36px}.section-heading{align-items:flex-end;gap:24px}.learning-home .section-kicker{color:#58a991;font-size:12px;margin-bottom:12px}.section-heading h2{font-size:27px;line-height:1.4;font-weight:600;margin-bottom:8px}.section-heading p:not(.section-kicker){font-size:15px;color:#8a9a92}.learning-home .search-box{width:240px;height:44px;border-color:#e3ece7;border-radius:12px;margin-bottom:3px;color:#9ab0a5;flex-shrink:0}.search-box svg{flex-shrink:0}.grade-tabs{gap:12px;margin:24px 0 16px;padding-bottom:3px}.grade-tabs button{display:flex;align-items:center;justify-content:center;min-height:42px;padding:8px 18px;border-radius:8px;font-size:16px;color:#7a9185;flex-shrink:0}.grade-tabs button.selected{background:#5ab99f;color:#fff;box-shadow:0 4px 12px #58b89f20}.new-pill{font-size:10px;padding:2px 5px;line-height:1.3;border-radius:3px;margin-left:7px}.media-tabs[hidden]{display:none}.media-tabs{margin:0 0 18px}.learning-home .course-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.course-card{display:flex;flex-direction:column;border-radius:8px;border:1px solid #e3ece7;box-shadow:0 6px 20px #3b795d07}.course-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px #3b795d13}.card-art{height:130px;width:100%;flex-shrink:0}.mint .card-art,.course-cover.mint{background:#a9dac8}.blue .card-art,.course-cover.blue{background:#a9dced}.yellow .card-art,.course-cover.yellow{background:#f1d590}.purple .card-art,.course-cover.purple{background:#cbb8db}.card-art:before{width:160px;height:160px;right:-26px;top:22px;border-width:18px}.card-art:after{width:92px;height:92px;right:14px;top:48px;border-width:11px}.card-badge{top:15px;left:15px;font-size:13px;line-height:1.5;padding:4px 8px;border-radius:5px;background:#ffffffac;max-width:calc(100% - 30px)}.card-symbol{font-size:76px;font-weight:800;left:26px;bottom:-5px}.card-spark{left:119px;top:60px;font-size:22px}.card-wave{right:56px;bottom:-56px;width:185px;height:105px}.card-body{padding:15px 16px 16px;display:flex;flex-direction:column;width:100%;flex:1}.card-title-row{gap:8px;flex:1}.card-title-row h3{font-size:18px;line-height:1.5;font-weight:600;margin:0 0 5px}.card-title-row p{font-size:14px;color:#82978b;line-height:1.7;min-height:48px}.arrow{width:27px;height:27px;margin-top:2px;background:#f0f7f3;color:#5aaa92}.card-meta{font-size:13px;color:#8a9f93;gap:12px;padding-top:11px;margin-top:13px;flex-wrap:wrap}.progress-row{margin-top:13px}.progress{height:4px;background:#edf2ef}.progress-row b{font-size:12px;color:#58aa90;font-weight:500}.learning-home .continue-strip{max-width:1200px;width:calc(100% - 48px);margin:0 auto 32px;border:0;border-top:1px solid #e5eee8;border-radius:0;background:transparent;padding:22px 0 0;box-shadow:none}.continue-icon{border-radius:8px}.continue-text h3{font-size:18px}.continue-text span{font-size:15px;color:#829589}.continue-strip>button{border-radius:8px}.learning-home .announcement{max-width:1200px;width:calc(100% - 48px);margin:16px auto 0;border-radius:8px}footer{max-width:1200px;margin:0 auto;padding:20px 0;min-height:74px;border-color:#edf2ee;font-size:13px;color:#95a69b}footer button{font-size:14px;color:#809889}@media(max-width:1100px){.topbar{gap:28px}.topnav{gap:24px}.hero-art{right:-60px;width:540px;height:306px}.hero h1{font-size:44px}.learning-home .course-grid{grid-template-columns:repeat(3,minmax(0,1fr))}footer{margin:0 24px}}@media(max-width:850px){.topbar{gap:20px;min-height:74px;padding:0 24px;flex-wrap:nowrap}.brand{min-width:150px}.topnav{order:initial;flex-basis:auto;justify-content:flex-start;min-height:74px;gap:20px}.topnav button{font-size:15px}.brand span{display:none}.top-actions{gap:8px}.hero-art{right:-40px;width:420px;height:238px;opacity:1}.hero h1{font-size:42px}.hero-sub{font-size:16px}.learning-home .course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.grade-tabs{gap:4px}.grade-tabs button{padding:8px 14px}.continue-strip{min-height:0}}@media(max-width:680px){.topbar{height:auto;flex-wrap:wrap;gap:0;padding:12px 20px 0}.topnav{order:3;flex-basis:100%;min-height:46px;gap:28px;overflow:auto}.topnav button{font-size:16px;flex-shrink:0}.brand{min-width:0}.brand strong{font-size:22px}.top-actions{margin-left:auto}.icon-button{width:40px;height:40px}.login-link{font-size:15px;padding:8px 17px}.learning-home .hero{height:430px;align-items:flex-start;padding-top:28px;width:calc(100% - 40px)}.hero-copy{max-width:100%}.hero h1{font-size:38px}.hero .eyebrow{font-size:13px;margin-bottom:12px}.hero-sub{font-size:16px;margin:14px 0}.hero-stats{font-size:13px;gap:9px}.hero-stats strong{font-size:14px}.hero-art{width:260px;height:147px;right:-20px;bottom:0;opacity:1}.learning-home .content{width:calc(100% - 40px);padding:25px 0 28px}.section-heading{display:block}.section-heading h2{font-size:25px}.section-heading p:not(.section-kicker){font-size:15px}.learning-home .search-box{width:100%;margin:18px 0 0}.grade-tabs{margin:20px 0 15px;gap:6px}.grade-tabs button{font-size:15px;padding:8px 14px}.learning-home .course-grid{grid-template-columns:1fr;gap:18px}.card-art{height:150px}.card-symbol{font-size:86px}.card-body{padding:18px}.card-title-row h3{font-size:20px}.card-title-row p{font-size:16px;min-height:0}.card-meta{font-size:14px;gap:18px}.learning-home .continue-strip{width:calc(100% - 40px);gap:12px;padding-top:20px;flex-wrap:wrap}.continue-text{min-width:0;flex:1}.learning-home .continue-strip>button{flex-basis:100%;margin-left:0}.continue-text h3{font-size:17px}.continue-text span{font-size:15px}.learning-home .announcement{width:calc(100% - 40px)}footer{margin:0 20px;flex-wrap:wrap;gap:8px;font-size:13px}}@media(prefers-reduced-motion:reduce){.course-card{transition:none}.course-card:hover{transform:none}}.topbar{gap:24px}.brand{min-width:166px}.brand span.brand-english{display:block;font-size:14px;color:#42967f;font-weight:600}.topnav{gap:24px}.top-actions{gap:8px;min-width:0}.language-picker{display:flex;align-items:center;gap:4px;margin:0;color:#579381;min-width:0}.language-picker svg{flex-shrink:0}.language-picker select{width:115px;padding:7px 4px;font-size:14px;border:0;background:transparent;margin:0;cursor:pointer}.share-modal{width:min(620px,calc(100vw - 48px));min-width:0;max-width:100%;background:#fff;position:relative;padding:30px;border-radius:8px;max-height:calc(100dvh - 40px);overflow:auto;outline:none}.share-modal h2{font-size:26px;margin:6px 0 10px}.share-title{color:#718e80;overflow-wrap:anywhere;margin-bottom:18px}html:not([lang=zh-CN]):not([lang=zh-TW]) .card-symbol{font-size:40px;max-width:75%;overflow-wrap:anywhere}.card-meta{flex-wrap:wrap;row-gap:6px}.card-meta span{white-space:normal}.lesson-duration{flex-shrink:0}.social-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:20px 0}.social-grid button{padding:14px 4px;display:flex;flex-direction:column;align-items:center;gap:9px;border:1px solid #e0eae4;border-radius:8px;background:#fff;min-width:0;font-size:13px}.social-grid button:hover,.social-grid button.selected{border-color:#69ba9e;background:#eef8f2}.social-grid span{overflow-wrap:anywhere}.share-link{display:flex;gap:8px;align-items:center}.share-link input{font-size:14px;direction:ltr}.share-link button{width:44px;height:44px;flex-shrink:0;display:grid;place-items:center;color:#3a9779;border:1px solid #d7e8dd;border-radius:8px}.share-bottom{display:flex;gap:18px;align-items:center;margin-top:20px}.share-bottom img{flex-shrink:0}.share-bottom .muted{font-size:13px;margin:10px 0 0}html[dir=rtl] .top-actions{margin-left:0;margin-right:auto}html[dir=rtl] .brand,html[dir=rtl] .course-card{text-align:right}html[dir=rtl] .hero-art{right:auto;left:-35px}html[dir=rtl] .continue-strip>button{margin-left:0;margin-right:auto}html[dir=rtl] .continue-icon{margin-left:15px;margin-right:0}html[lang]:not([lang=zh-CN]):not([lang=zh-TW]) .hero h1{font-size:40px;max-width:530px;line-height:1.25}html[lang]:not([lang=zh-CN]):not([lang=zh-TW]) .hero-copy{max-width:50%}html[lang]:not([lang=zh-CN]):not([lang=zh-TW]) .learning-home .hero{height:auto;min-height:380px;padding:32px 0}html[lang]:not([lang=zh-CN]):not([lang=zh-TW]) .hero-art{width:45%;right:0}html[lang=ar] .hero-art{right:auto;left:0}.topnav button,.login-link{white-space:normal;line-height:1.5}@media(max-width:1100px){.topbar{height:auto;min-height:74px;flex-wrap:wrap;padding-top:10px}.topnav{order:3;flex-basis:100%;min-height:45px;flex-wrap:wrap;height:auto}.topnav button{min-height:44px}}@media(max-width:680px){.topbar{padding:12px 16px 0;gap:7px}.brand{min-width:130px;gap:8px}.brand strong{font-size:21px}.brand span.brand-english{font-size:13px}.top-actions{flex-wrap:wrap;justify-content:flex-end;gap:3px;flex:1}.language-picker{justify-content:flex-end;flex-basis:100%}.language-picker select{width:108px}.icon-button{width:34px;height:34px}.login-link{padding:7px 9px;font-size:14px}.topnav{gap:15px}.topnav button{font-size:15px}html[lang]:not([lang=zh-CN]):not([lang=zh-TW]) .hero h1{font-size:32px}html[lang]:not([lang=zh-CN]):not([lang=zh-TW]) .hero-copy{max-width:100%}html[lang]:not([lang=zh-CN]):not([lang=zh-TW]) .learning-home .hero{height:auto;min-height:490px;padding-bottom:158px}html[lang]:not([lang=zh-CN]):not([lang=zh-TW]) .hero-art{width:260px;right:-20px}html[dir=rtl] .hero-art{left:-20px;right:auto}html[dir=rtl]:not([lang=zh-CN]):not([lang=zh-TW]) .hero-art{left:-20px;right:auto}.share-modal{width:calc(100vw - 32px);padding:26px 18px}.social-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.share-modal h2{font-size:23px;padding-inline-end:18px}.share-bottom{gap:8px;flex-wrap:wrap}.share-bottom>div{flex:1;min-width:140px}}