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solid var(--line);background:white;border-radius:13px;margin-bottom:12px;overflow:hidden}.review-card>summary{list-style:none;cursor:pointer;padding:18px 21px;display:flex;align-items:center;gap:13px}.review-card>summary::-webkit-details-marker{display:none}.review-card>summary>div{flex:1}.review-card summary h3{font-size:16px;margin:0 0 6px}.review-card summary p{font-size:14px;color:#96a693;margin:0}.review-card summary .tag{font-size:12px}.review-detail{border-top:1px solid var(--line);padding:20px 25px}.review-detail audio{width:100%;height:41px;margin:7px 0 12px}.recording-row{display:flex;justify-content:space-between;gap:10px;background:#fff;padding:22px;border:1px solid var(--line);border-radius:12px;margin-bottom:12px}.recording-row h3{font-size:17px;margin:0 0 9px}.recording-row p{font-size:14px;color:#8c9f8c;margin:0;line-height:1.9}.word-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.word-card{padding:22px;background:white;border:1px solid var(--line);border-radius:12px;display:flex;justify-content:space-between;gap:10px}.word-card h3{font-family:"Microsoft YaHei",sans-serif;font-size:27px;font-weight:500;margin:0 0 7px}.word-card p{font-size:14px;line-height:1.8;margin:5px 0;color:#83977e}.word-card small{font-size:13px;color:#a3af9d}.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.guide-grid h2{font-size:20px;margin:0 0 15px}.guide-grid p,.guide-grid li{font-size:16px;line-height:2;color:#7d927a}.guide-grid a{text-decoration:underline;color:var(--green);text-underline-offset:3px}.guide-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:15px}.guide-table td,.guide-table th{text-align:left;padding:11px 8px;border-bottom:1px solid var(--line);font-weight:450}.guide-table th{color:#8ba181;font-size:13px}.setup-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field-label{display:block;font-size:15px;color:#7a9075;margin:0 0 8px}.setup-grid select{width:100%;min-height:40px;border:1px solid #dce7da;border-radius:8px;background:white;padding:10px;color:#526c4e}.setup-check{font-size:15px;color:#8a9f83;display:flex;gap:8px;align-items:center;margin:14px 0;line-height:1.8}.setup-check input{accent-color:var(--green)}.setup-note{font-size:15px;color:#809678;line-height:2;margin:20px 0}.toast{position:fixed;bottom:27px;left:calc(50% + 100px);transform:translate(-50%,20px);opacity:0;pointer-events:none;z-index:100;background:#203c30;color:white;font-size:15px;line-height:1.7;padding:13px 19px;border-radius:10px;box-shadow:0 8px 30px #102b3020;transition:opacity .2s,transform .2s;max-width:calc(100vw - 40px)}.toast.show{opacity:1;transform:translate(-50%,0)}.loading-state{padding:80px 0;text-align:center;color:#8da38b}.error-banner{background:#fff4e7;border:1px solid #efd9b5;padding:14px 17px;color:#a37b41;font-size:15px;border-radius:9px;line-height:1.9;margin:15px 0}.text-button{border:0;background:transparent;color:var(--green);font-size:15px;text-decoration:underline;cursor:pointer}.check-result{font-size:15px;line-height:1.9;color:#7c9276}.run-active .site-footer{display:none}
@media(min-width:1550px){.hero{min-height:265px}.hero-copy{padding:38px 43px}.hero h2{font-size:41px}.hero p{font-size:16px}.part-card{padding:22px 19px}.part-card h3{font-size:18px}.part-card p{font-size:14px}.part-time{font-size:13px}.part-grid{gap:15px}.bottom-grid{margin-top:27px}}
@media(max-width:1150px){.app-shell{grid-template-columns:205px minmax(0,1fr)}.sidebar{padding:30px 12px 20px}.brand{font-size:26px}.brand small{font-size:10.7px}.main-nav a{padding:11px 12px;font-size:15px}.topbar{padding:0 27px}main{padding:30px 27px 40px}.hero-copy{padding:29px}.hero h2{font-size:32px}.part-grid{gap:8px}.part-card{padding:15px 11px}.part-card h3{font-size:14px}.part-card p{font-size:12px}.part-time{font-size:11px;gap:2px}.part-num-big{font-size:26px}.float-note.one{left:3%}.float-note.two{right:5%}.bottom-grid{gap:14px}.card{padding:20px}.site-footer{margin:0 27px}.session-layout{grid-template-columns:minmax(0,1fr) 215px}.session-prompt{padding:23px}.word-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:920px){.app-shell{grid-template-columns:180px minmax(0,1fr)}.brand{font-size:23px;gap:7px;padding-left:5px}.brand img{width:33px;height:33px}.brand small{font-size:9.5px;letter-spacing:1px}.nav-label{font-size:12px;letter-spacing:1.2px}.main-nav a{font-size:14px;gap:8px}.main-nav .icon{width:16px;height:16px}.sidebar-tip{padding:16px 12px 43px;margin:35px 4px 15px}.sidebar-tip strong{font-size:16px}.sidebar-tip p{font-size:13px}.sidebar-footer{font-size:13px;padding-left:6px}.sidebar-footer small{font-size:12px}.topbar{height:66px;padding:0 23px}.today{display:none}.topbar-right{gap:8px}main{padding:27px 23px 38px}.hero{grid-template-columns:1.3fr .8fr}.hero-copy{padding:25px}.hero h2{font-size:30px}.hero-glyph{font-size:119px}.float-note{padding:9px;font-size:12px}.float-note strong{font-size:16px}.float-note.one{top:35px}.float-note.two{bottom:35px}.hero p{font-size:14px}.part-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.part-card h3{font-size:16px}.part-card p{font-size:13px;min-height:24px}.part-time{font-size:12px}.part-card:last-child{grid-column:auto}.part-grid .part-card{padding:16px}.bottom-grid{grid-template-columns:1fr}.device-label>span{display:none}.page-head h1{font-size:29px}.guide-grid{grid-template-columns:1fr}.session-layout{grid-template-columns:1fr}.session-prompt{border-right:0;border-bottom:1px solid var(--line)}.session-timer{display:grid;grid-template-columns:110px 1fr;justify-items:center;padding:20px 25px;gap:10px 15px}.timer-ring{width:108px;height:108px;grid-column:1;grid-row:1 / span 4;padding:5px}.timer-number{font-size:38px}.phase-label,.phase-note,.phase-dots,.session-timer>.btn,.wave{grid-column:2}.phase-note{min-height:0;margin:0}.phase-dots{display:none}.session-timer>.btn{font-size:14px}.wave{display:none}.review-summary{grid-template-columns:1fr}.review-stats{gap:30px}.question-row{padding:15px;gap:10px}.question-row .row-actions .btn{font-size:14px;padding:8px 11px}.question-row .row-actions .btn .icon{display:none}.toolbar{gap:12px}.search{width:100%;min-width:0}.toast{left:calc(50% + 85px)}}
@media(max-width:680px){.app-shell{display:block}.sidebar{position:relative;height:auto;padding:16px 20px;border-right:0;border-bottom:1px solid var(--line);flex-direction:row;align-items:center;justify-content:space-between}.brand{font-size:27px;gap:10px;padding:0}.brand img{width:35px;height:35px}.brand small{font-size:10px;letter-spacing:1.6px;margin-top:4px}.sidebar .nav-label,.main-nav,.sidebar-tip{display:none}.sidebar-footer{border:0;padding:0;margin:0;font-size:13px}.sidebar-footer small{display:none}.topbar{height:48px;padding:0 20px}.breadcrumb{font-size:14px;gap:10px}.local-badge{font-size:10px;padding:6px 8px;letter-spacing:.5px}.local-badge .status-dot{width:4px;height:4px}main{padding:24px 19px 30px;min-height:calc(100dvh - 250px)}.page-head{margin-bottom:21px;align-items:center}.page-head h1{font-size:29px;margin-bottom:10px}.page-head p{font-size:14px}.page-head .eyebrow{font-size:12px}.page-head .subtle-link{font-size:13px}.hero{min-height:236px;grid-template-columns:1fr .65fr;border-radius:16px;margin-bottom:13px}.hero-copy{padding:26px 0 25px 24px}.hero .eyebrow{font-size:10.5px;letter-spacing:1.5px}.hero h2{font-size:29px;white-space:nowrap;font-weight:500}.hero p{font-size:13px;line-height:1.9;max-width:210px;position:relative;z-index:3}.hero .btn{font-size:14px;padding:10px 12px;min-height:36px}.hero-glyph{font-size:104px;margin-left:7px}.hero-art{overflow:visible}.hero-art:before{width:125px;height:125px}.hero-art:after{width:190px;height:190px}.float-note{padding:7px 9px;border-radius:7px;box-shadow:none}.float-note.one{font-size:11px;left:7px;top:34px;transform:rotate(-5deg)}.float-note.two{right:13px;bottom:24px}.float-note strong{font-size:15px}.float-note small{font-size:10px}.hero-tag{font-size:9px;letter-spacing:1px;right:12px;top:13px}.device-strip{padding:10px 12px;gap:6px;margin-bottom:23px}.device-label{font-size:12px;gap:5px}.device-label .icon{width:13px;height:13px}.device-label .status-dot{width:4px;height:4px;margin:0}.device-controls{gap:5px}.device-controls .btn{font-size:12px;padding:6px 7px;min-height:29px;gap:4px}.device-controls .btn .icon{width:12px;height:12px}.device-controls select{font-size:12px;padding:6px 4px}.section-heading{margin:23px 0 13px;gap:10px}.section-heading h2{font-size:20px}.section-heading p{font-size:13px}.section-heading>span{font-size:12px}.part-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.part-grid .part-card{padding:16px 15px}.part-card h3{font-size:16px;margin:12px 0 7px}.part-card p{font-size:12.5px;min-height:25px;margin-bottom:8px;line-height:1.8}.part-top{gap:8px}.part-number{font-size:12px}.part-num-big{font-size:28px}.part-time{font-size:12px;padding-top:8px}.part-card .progress{margin-top:10px}.part-card:last-child{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:0 15px}.part-card:last-child .part-top{grid-column:1 / -1}.part-card:last-child p{margin-top:5px;grid-column:2;grid-row:2;min-height:0}.part-card:last-child .part-time{grid-column:1 / -1}.part-card:last-child .progress{grid-column:1 / -1}.bottom-grid{margin-top:16px;gap:14px}.card{padding:22px;border-radius:14px}.exam-card h2{font-size:26px}.exam-card p{font-size:14px}.exam-meta{font-size:13px;gap:15px}.exam-bottom .btn{flex:1;font-size:14px}.card-heading h2{font-size:18px}.stat-cell strong{font-size:31px}.stat-cell small{font-size:13px}.stat-row{margin:23px 0}.notice{font-size:13px;margin-top:15px}.site-footer{margin:0 20px;padding:19px 0 93px;display:block;font-size:12px}.site-footer>span{display:block;margin-bottom:6px}.site-footer a{display:inline-block;margin-top:6px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:#ffffffed;backdrop-filter:blur(15px);border-top:1px solid #e4ece4;z-index:15;justify-content:space-around;align-items:center;padding:10px 6px calc(10px + env(safe-area-inset-bottom))}.mobile-nav a{display:flex;flex-direction:column;align-items:center;gap:6px;color:#9baa9e;font-size:12px;min-width:55px;padding:2px 4px}.mobile-nav .icon{width:19px;height:19px}.mobile-nav a.active{color:var(--green);font-weight:700}.toolbar{margin-top:18px}.filters{gap:5px}.filter{font-size:13px;padding:8px 10px}.search{padding:11px 12px}.question-row{grid-template-columns:30px minmax(0,1fr);gap:11px;padding:16px 13px}.q-number{width:30px;height:32px;border-radius:8px;font-size:14px}.question-row h3{font-size:16px}.question-row p{font-size:14px}.row-meta{font-size:12px}.row-actions{grid-column:2;justify-content:flex-start;margin-top:2px}.row-actions .icon-button{width:31px;height:31px}.question-row .row-actions .btn{min-height:31px;font-size:13px;padding:7px 12px}.modal{max-height:93dvh}.modal-head{padding:16px 18px}.modal-head h2{font-size:18px}.modal-content{padding:20px}.study-question{font-size:25px;line-height:1.9}.ko-line{font-size:15px}.pinyin-line{font-size:14px}.answer-panel{padding:18px;margin-top:19px}.zh-answer{font-size:20px;line-height:2.1}.answer-panel h3{font-size:14px}.answer-panel h3 .btn{min-height:30px;font-size:13px;padding:6px 8px}.story-grid{grid-template-columns:repeat(2,1fr)}.strategy{font-size:14px;padding:12px}.detail-actions{gap:7px}.detail-actions .btn{font-size:14px;padding:9px 12px}.word-chips{gap:7px}.word-chip{padding:9px 10px}.word-chip strong{font-size:16px}.word-chip small{font-size:12px}.session-head h1{font-size:20px}.session-head p{font-size:13px}.session-head .btn{font-size:13px;min-height:33px;padding:8px 10px}.session-banner{padding:14px 17px;font-size:12px}.session-banner strong{font-size:14px}.session-prompt{padding:20px 17px}.session-prompt .study-question{font-size:27px;line-height:1.9;margin:18px 0}.session-prompt .single-scene{margin:14px 0}.session-timer{padding:18px 20px;grid-template-columns:96px 1fr;gap:9px 14px}.timer-ring{width:94px;height:94px;padding:4px}.timer-number{font-size:35px}.phase-label{font-size:15px}.phase-note{font-size:13px}.session-footer{padding:13px 16px;gap:8px}.session-footer small{font-size:12px}.session-footer .btn{font-size:13px;min-height:34px;padding:8px 11px}.run-active main{padding:18px 13px 95px}.run-active .mobile-nav{display:none}.run-active main{padding-bottom:30px}.run-active .topbar{display:none}.practice-hint{padding:0 12px}.practice-hint>summary{font-size:14px}.practice-hint .answer-panel{padding:15px}.review-summary{padding:23px}.review-summary h1{font-size:26px}.review-summary p{font-size:14px}.review-stats{gap:25px}.review-stats strong{font-size:32px}.review-card>summary{padding:15px;gap:10px}.review-card summary h3{font-size:15px}.review-card summary p{font-size:13px}.review-card summary .tag{font-size:11px}.review-detail{padding:19px 16px}.self-check label{font-size:14px}.recording-row{display:block;padding:20px}.recording-row .row-actions{margin-top:17px}.word-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.word-card{padding:17px 13px}.word-card h3{font-size:24px}.word-card p{font-size:13px}.word-card .icon-button{width:28px;height:28px}.setup-grid{grid-template-columns:1fr}.guide-grid p,.guide-grid li{font-size:15px}.guide-table{font-size:13px}.toast{left:50%;bottom:91px;font-size:14px;max-width:calc(100vw - 35px);width:max-content}.run-active .toast{bottom:20px}.page-head .btn.large{min-height:36px;font-size:13px;padding:10px}.empty-state{padding:45px 18px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Larger type and compact learning UI */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.app-shell{grid-template-columns:255px minmax(0,1fr)}
.sidebar{padding-top:30px}.main-nav{margin-top:38px}.main-nav a{min-height:52px}.main-nav a>span:not(.nav-new):not(.nav-count){min-width:0}.brand{white-space:nowrap}
.page-head{align-items:center;flex-wrap:wrap;margin-bottom:24px}.page-head h1{margin:0;line-height:1.4}.subtle-link{color:#61776b}
.device-strip{justify-content:flex-start;background:transparent;border:0;padding:0;margin:0 0 26px}.device-controls{gap:10px}.device-controls .btn{min-height:42px;padding:10px 13px}.device-controls select{min-height:42px;border:1px solid var(--line);background:white;padding:8px 10px}
.section-heading{margin-top:0;margin-bottom:15px}.section-heading>span{color:#748276}
.part-grid{gap:13px}.part-grid .part-card{display:flex;flex-direction:column;min-height:166px;padding:20px 17px}
.part-top{width:100%}.part-count{font-size:12px;color:#78877d;font-variant-numeric:tabular-nums}.part-number{font-weight:750}
.part-card h3{white-space:normal;line-height:1.6;margin:21px 0 23px;letter-spacing:-.5px}
.part-time{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:3px;width:100%;margin-top:auto;padding-top:13px;color:#738378}.part-time span{white-space:nowrap}.part-time span:last-child{text-align:right}
.part-card .progress{width:100%;margin-top:13px}.part-grid .part-card:last-child{display:flex;grid-template-columns:none}
.bottom-grid{margin-top:22px}.card{padding:24px}.card-heading h2{line-height:1.5}.card-heading>span{color:#748276}.exam-card h2{font-size:19px;font-weight:700;margin:0}.exam-bottom{margin-top:24px;gap:10px}.exam-bottom .btn{flex:1}.exam-bottom select{min-height:44px;padding:10px 13px;font-size:14px}
.stat-row{margin:22px 0}.stat-cell small{color:#77877b}.mini-progress{margin-bottom:0}.learning-links a{color:#677f6b}.site-footer{align-items:center}.site-footer a{color:#718778}
.answer-panel h3{flex-wrap:wrap;gap:10px}.session-head{flex-wrap:wrap}.session-banner{flex-wrap:wrap;line-height:1.8}.session-footer{flex-wrap:wrap}.session-footer small>.icon{display:inline-block;vertical-align:middle}.word-chip{max-width:100%}.word-chip>span{min-width:0;overflow-wrap:anywhere}
@media(max-width:1150px){.app-shell{grid-template-columns:235px minmax(0,1fr)}.part-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.part-grid .part-card{padding:18px 15px}}
@media(max-width:920px){.app-shell{grid-template-columns:205px minmax(0,1fr)}.part-card h3{font-size:16px}.main-nav a{font-size:14px}.card{padding:21px}.device-controls .btn{min-height:42px}.session-footer small{line-height:1.8}}
@media(max-width:680px){
 .app-shell{display:block}.sidebar{padding:17px 20px}.main-nav{display:none}.brand{font-size:27px}.topbar{display:none}
 main{padding:25px 19px 30px;min-height:calc(100dvh - 150px)}.page-head{gap:10px;margin-bottom:20px}.page-head h1{font-size:29px}.page-head .subtle-link{font-size:13px}
 .device-strip{margin-bottom:26px}.device-controls{width:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) 70px;gap:7px}.device-controls .btn{padding:9px 7px;font-size:12px;gap:6px;min-height:43px}.device-controls .btn .icon{width:16px;height:16px}.device-controls select{font-size:12px;padding:8px 7px;min-width:0;min-height:43px}
 .section-heading{margin:0 0 13px}.section-heading h2{font-size:20px}.section-heading>span{font-size:12px}
 .part-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.part-grid .part-card{padding:18px 14px 15px;min-height:155px;border-radius:14px}.part-number,.part-count{font-size:12px}.part-card h3{font-size:16px;line-height:1.55;margin:19px 0 21px}.part-time{font-size:12px;padding-top:12px;letter-spacing:-.3px}.part-card .progress{margin-top:12px}.part-grid .part-card:last-child{display:flex;min-height:141px;gap:0}.part-card:last-child h3{margin:15px 0 17px}.part-card:last-child .part-time{grid-column:auto}
 .bottom-grid{margin-top:18px;gap:15px}.card{padding:21px}.card-heading h2,.exam-card h2{font-size:19px}.card-heading>span{font-size:13px}.exam-bottom{margin-top:20px;gap:9px}.exam-bottom select{font-size:14px;min-height:43px}.exam-bottom .btn{font-size:14px;min-height:43px}.stat-cell small{font-size:13px}.stat-cell strong{font-size:31px}.learning-links a{font-size:14px}
 .mobile-nav{padding-top:11px;padding-bottom:calc(11px + env(safe-area-inset-bottom))}.mobile-nav a{font-size:12px;min-width:54px;gap:6px;color:#74887a}.mobile-nav a.active{color:var(--green)}.mobile-nav .icon{width:22px;height:22px}.site-footer{display:flex;padding-bottom:105px}.site-footer a{margin-top:0}
 .page-head .btn.large{min-height:42px}.answer-panel h3{font-size:14px}.session-head .btn{min-height:40px}.session-timer>.btn{max-width:100%;line-height:1.6}.session-prompt .tag{max-width:100%;line-height:1.8}.review-card>summary{flex-wrap:wrap}.review-card>summary>div{min-width:100px}.review-stats{flex-wrap:wrap}.word-list{grid-template-columns:repeat(2,minmax(0,1fr))}.word-card{padding:17px 12px;min-width:0}.word-card>div{min-width:0;overflow-wrap:anywhere}.word-card h3{overflow-wrap:anywhere}.question-row>div{min-width:0}.row-actions{flex-wrap:wrap}.guide-table{font-size:12px}.guide-table td,.guide-table th{padding:9px 5px}
}
@media(max-width:360px){.page-head h1{font-size:29px}.part-grid{gap:10px}.part-grid .part-card{padding-left:12px;padding-right:12px}.part-count{font-size:12px}.part-time{letter-spacing:-.6px}.word-list{grid-template-columns:1fr}}
.part-grid .part-card:last-child{align-items:stretch}.bottom-grid{align-items:start}