:root{--paper:#f7f7f2;--white:#fffefa;--ink:#233d39;--muted:#7d8580;--line:#e4e7dd;--green:#254d43;--lime:#d9e8af;--orange:#e58965;--serif:Georgia,'Songti SC','STSong',serif;--sans:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.65}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #e5a171;outline-offset:4px}button{border:0;background:none}svg{display:block}.icon{width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.skip{position:fixed;top:-80px;left:16px;padding:10px;background:white;z-index:100}.skip:focus{top:10px}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:600}small{font-size:12px}.muted{color:var(--muted)}.eyebrow{font-size:11px;font-weight:600;letter-spacing:2px}.serif{font-family:var(--serif)}.sidebar{width:224px;height:100dvh;position:fixed;inset:0 auto 0 0;background:#203e3a;color:#f8f7ed;padding:36px 25px;display:flex;flex-direction:column;z-index:30}.logo{display:flex;align-items:center;gap:11px}.brand-mark{display:grid;place-items:center;width:41px;height:43px;border:1px solid #9aaba1;border-radius:10px 10px 10px 0;font:26px var(--serif);background:#294a44;color:#f3f5e8}.logo-name{font:27px var(--serif);letter-spacing:3px}.logo-sub{font-size:10px;letter-spacing:1.3px;color:#b0beb1;margin-top:2px}.nav-label{font-size:10px;letter-spacing:2px;color:#9aafa1;margin:58px 14px 17px}.side-link{display:flex;align-items:center;gap:13px;border-radius:8px;padding:12px 14px;margin:6px 0;color:#bac9bd;transition:background .2s}.side-link.active{background:#34564b;color:#f7faed}.side-link .nav-dot{width:5px;height:5px;background:#d9e8af;margin-left:auto;border-radius:50%}.side-link:hover{background:#2a4b43}.side-plan{margin-top:auto;background:#2b4b42;border:1px solid #48634f;border-radius:12px;padding:18px 15px}.side-plan p{font:17px var(--serif);line-height:1.8;margin:8px 0}.side-plan small{color:#aabfae}.tiny-tree{color:var(--lime);margin-bottom:12px}.side-bottom{display:flex;align-items:center;gap:10px;margin:24px 0 0;font-size:12px;color:#afbeaf}.avatar{width:33px;height:33px;border-radius:50%;display:grid;place-items:center;background:#e7ead7;color:#355347;font-family:var(--serif)}.workspace{margin-left:224px}.topbar{height:85px;margin:0 48px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.topbar-left{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:10px}.topbar-left strong{font-weight:500;color:var(--ink)}.topbar-right{display:flex;align-items:center;gap:20px;font-size:11px;color:var(--muted)}.online-dot{width:6px;height:6px;background:#64826b;border-radius:50%;display:inline-block;margin-right:6px}.main-inner{padding:34px 48px 40px;max-width:1500px;margin:auto}.page-title{font:30px/1.5 var(--serif);letter-spacing:1px}.page-sub{font-size:13px;color:var(--muted);margin-top:6px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:30px 0 17px}.section-head h2{font:21px var(--serif);letter-spacing:.4px}.text-link{font-size:12px;color:var(--green);display:inline-flex;align-items:center;gap:7px;padding:6px 0}.text-link:hover{text-decoration:underline}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 20px;min-height:44px;border-radius:6px;background:var(--green);color:white;font-size:13px;transition:transform .15s,background .15s}.btn:hover{background:#376553;transform:translateY(-1px)}.btn.light{background:#f9fbef;color:var(--ink)}.btn.outline{border:1px solid #d2d9c7;background:transparent;color:var(--ink)}.btn.soft{background:#e9efde;color:var(--green)}.btn.small{min-height:38px;padding:8px 14px;font-size:12px}.btn .icon{width:16px;height:16px}.hero{display:grid;grid-template-columns:1.6fr 1fr;margin-top:25px;border:1px solid #dde3d3;border-radius:12px;overflow:hidden;min-height:268px;background:#eaf0dd}.hero-copy{padding:32px 35px;position:relative;overflow:hidden}.hero .eyebrow{color:#557557}.hero h1{font:35px/1.5 var(--serif);letter-spacing:1px;margin:14px 0 10px;position:relative;z-index:1}.hero h1 em{font-style:normal;position:relative}.hero h1 em:after{content:'';position:absolute;height:5px;background:#dcaa75;bottom:1px;left:0;right:0;z-index:-1;border-radius:5px}.hero-copy>p{max-width:340px;font-size:12px;color:#71816c;margin-bottom:22px}.hero-art{display:flex;align-items:center;justify-content:center;background:#e2eacb;position:relative;overflow:hidden;min-height:240px}.hero-art>svg{width:88%;max-height:250px}.hero-art .art-note{position:absolute;bottom:17px;font-size:9px;letter-spacing:2px;color:#687a58}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1fr) 267px;gap:28px}.level-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.level-card{padding:19px 17px;border:1px solid var(--line);border-radius:9px;background:var(--white);text-align:left;position:relative;transition:transform .2s,border-color .2s}.level-card:hover{transform:translateY(-3px);border-color:#a3b38b}.level-card.recommended{border-color:#94a875;box-shadow:0 0 0 1px #94a87555}.level-no{font:26px Georgia,serif;line-height:1.3;color:#526b44}.level-card:nth-child(2) .level-no{color:#ab864c}.level-card:nth-child(3) .level-no{color:#bf805e}.level-card:nth-child(4) .level-no{color:#8186a3}.level-card h3{font-size:13px;margin:10px 0 4px}.level-card p{font-size:10px;color:var(--muted)}.level-card footer{border-top:1px solid #edf0e6;margin-top:15px;padding-top:10px;font-size:10px;color:#829075;display:flex;justify-content:space-between;align-items:center}.level-card footer .icon{width:13px;height:13px}.ribbon{position:absolute;right:8px;top:9px;font-size:9px;color:#557348;background:#eaf0dc;border-radius:3px;padding:2px 5px}.article-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.article-card{border:1px solid var(--line);border-radius:10px;background:var(--white);padding:21px;transition:transform .2s,border-color .2s;display:flex;flex-direction:column;min-width:0}.article-card:hover{transform:translateY(-2px);border-color:#a8b99c}.article-card .card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:13px}.level-badge{font-family:Georgia,serif;font-size:12px;font-weight:bold;padding:2px 8px;border-radius:4px;background:#e7edda;color:#617747}.level-badge.l2{background:#f5ead7;color:#a08042}.level-badge.l3{background:#f9e5d9;color:#b47653}.level-badge.l4{background:#e9e9f2;color:#7b7f9a}.topic-badge{font-size:10px;color:#8b9186;letter-spacing:.3px}.article-card h3{font:21px/1.3 Georgia,serif;overflow-wrap:anywhere}.article-card .zh-title{font-size:12px;margin-top:7px;color:#7b8479}.card-meta{display:flex;align-items:center;gap:13px;color:#8e9489;font-size:10px;margin:20px 0 0}.card-meta span{display:flex;align-items:center;gap:5px}.card-meta .icon{width:12px;height:12px}.card-bottom{margin-top:auto;padding-top:17px;display:flex;align-items:center;justify-content:space-between;border-top:1px solid #edf0e5;margin-top:17px;font-size:11px;color:#5c7359}.card-bottom .icon{width:14px;height:14px}.article-number{font:italic 12px Georgia,serif;color:#acb19f}.dash-aside{padding-top:30px}.aside-card{border:1px solid var(--line);border-radius:10px;padding:22px;background:var(--white);margin-bottom:18px}.aside-card h3{font:18px var(--serif)}.aside-card .eyebrow{font-size:9px;color:#919a87}.progress-ring{width:110px;height:110px;margin:24px auto;position:relative}.progress-ring svg{width:110px;height:110px;transform:rotate(-90deg)}.ring-center{position:absolute;inset:0;display:grid;place-content:center;text-align:center;font:26px Georgia,serif}.ring-center small{font:10px var(--sans);color:var(--muted);margin-top:3px}.stats-row{display:flex;justify-content:space-around;text-align:center}.stats-row strong{font:21px Georgia,serif;display:block}.stats-row small{color:var(--muted);font-size:10px}.tip-card{background:#f0eee3;border-color:#e6e3d4}.tip-card .tip-icon{color:#8b8f69;margin-bottom:12px}.tip-card p{font-size:12px;color:#7f826e;margin-top:10px;line-height:1.9}.tip-card .step{display:flex;gap:10px;margin-top:12px;align-items:center;font-size:11px;color:#66745c}.step span{display:grid;place-items:center;border:1px solid #d0d6bf;width:21px;height:21px;border-radius:50%;font:11px Georgia}.site-footer{margin:0 48px;padding:22px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:#9aa18f;font-size:10px;letter-spacing:.5px}.mobile-nav{display:none}.loading{min-height:65vh;display:grid;place-content:center;justify-items:center;gap:15px;color:#8a9385}.empty{padding:60px 20px;text-align:center;border:1px dashed #ced7c3;border-radius:10px;background:#fffefa;margin:24px 0}.empty h3{font:24px var(--serif);margin:13px}.empty p{color:var(--muted);margin:12px auto 20px;max-width:380px}.empty .icon{width:36px;height:36px;margin:auto}.page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.library-toolbar{display:flex;justify-content:space-between;gap:20px;margin:28px 0 22px;align-items:center;flex-wrap:wrap}.tabs{display:flex;gap:6px;padding:4px;background:#eaeedf;border-radius:7px;flex-wrap:wrap}.tab{min-height:38px;padding:7px 17px;border-radius:5px;font-size:12px;color:#7b8770}.tab.active{background:#fffefa;box-shadow:0 1px 4px #263b2610;color:#345c46}.search-wrap{display:flex;align-items:center;border-bottom:1px solid #ced6c4;gap:8px;padding:7px 0;min-width:200px}.search-wrap .icon{width:16px;height:16px;color:#8b9680}.search-wrap input{outline:none;border:0;background:none;max-width:240px;width:100%;font-size:12px;color:var(--ink)}.library-summary{font-size:11px;color:#8b9580;margin:-6px 0 18px}.library-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.level-explain{background:#eaf0df;padding:17px 20px;border-radius:8px;margin-top:22px;font-size:12px;color:#78866c}.level-explain strong{color:#536e46}.test-shell{max-width:720px;margin:0 auto;padding:40px 25px}.test-intro{text-align:center;margin-top:10px}.test-intro .intro-icon{width:76px;height:76px;border-radius:22px;background:#e4edcf;display:grid;place-items:center;margin:28px auto 22px;color:#537044}.intro-icon .icon{width:32px;height:32px}.test-intro h1{font:32px var(--serif)}.test-intro>p{max-width:460px;margin:15px auto;color:#85907d;line-height:1.95}.test-features{display:grid;grid-template-columns:repeat(3,1fr);margin:30px 0;gap:12px}.test-features div{background:#fffefa;border:1px solid var(--line);border-radius:9px;padding:18px 8px;text-align:center}.test-features strong{display:block;font:25px Georgia,serif;margin-bottom:5px}.test-features small{color:var(--muted)}.test-note{font-size:11px;color:#91998a;margin-top:18px;line-height:1.9}.test-progress-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#8d9785}.progress-track{height:4px;background:#e4e9d9;border-radius:3px;overflow:hidden;margin:12px 0 32px}.progress-fill{height:100%;background:#6b8751;transition:width .3s}.question-card{background:#fffefa;border:1px solid var(--line);padding:34px 36px;border-radius:14px}.question-index{font-size:10px;letter-spacing:2px;color:#9aa68a}.question-word{font:46px Georgia,serif;margin:15px 0 8px}.question-prompt{color:#8d9587;font-size:12px;margin-bottom:25px}.answers{display:grid;gap:10px}.answer{border:1px solid #e2e7da;border-radius:7px;min-height:51px;text-align:left;padding:12px 18px;display:flex;align-items:center;gap:15px;background:#fffefa}.answer:hover{background:#eff3e7;border-color:#a8bb8c}.answer .letter{font:11px Georgia,serif;color:#a3ac96;width:20px}.answer.unknown{color:#939c89;justify-content:center;border-style:dashed;margin-top:3px}.test-bottom{margin-top:20px;display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted)}.result-hero{text-align:center;background:#e9f0d9;border:1px solid #d9e3c6;border-radius:13px;padding:32px}.result-level{font:64px Georgia,serif;line-height:1.3;margin:12px 0 5px}.result-hero h1{font:26px var(--serif)}.result-range{font-size:13px;margin:12px 0;color:#71835d}.result-bands{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:22px 0}.band{background:#fffefa;padding:16px;border:1px solid var(--line);border-radius:8px;text-align:center}.band strong{font:22px Georgia,serif;display:block;margin:6px 0}.band small{font-size:10px;color:var(--muted)}.result-actions{display:flex;justify-content:center;gap:12px;margin-top:24px}.reader-container{max-width:1120px;margin:auto;padding:28px 48px 60px}.reader-breadcrumb{display:flex;align-items:center;gap:7px;font-size:11px;color:#8a9480;margin:0 0 24px}.reader-breadcrumb a:hover{color:var(--green)}.reader-layout{display:grid;grid-template-columns:minmax(0,1fr) 210px;gap:33px}.reading-sheet{background:#fffefa;border:1px solid var(--line);border-radius:11px;padding:33px 34px 27px;min-width:0}.reader-title{font:34px/1.22 Georgia,serif;margin:15px 0 10px;overflow-wrap:anywhere}.reader-zh{font:17px var(--serif);color:#849078;line-height:1.7}.reader-meta{display:flex;align-items:center;gap:17px;font-size:10px;color:#8f9985;margin:17px 0 22px}.reader-divider{height:1px;background:#e7ebde;margin-bottom:22px}.reading-help{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:10px;color:#929c88;margin:0 0 15px}.reading-help span{display:flex;gap:6px;align-items:center}.reading-help .icon{width:13px;height:13px}.reader-paragraph{margin-bottom:18px}.sentence-block{position:relative;padding:5px 36px 5px 9px;margin-left:-9px;border-radius:6px;transition:background .2s;cursor:pointer}.sentence-block:hover{background:#f3f5eb}.sentence-block.open{background:#f2f5e9;margin-top:5px;margin-bottom:8px}.sentence-en{font:var(--reading-size,19px)/1.95 Georgia,'Times New Roman',serif;color:#33483c;white-space:pre-wrap;overflow-wrap:anywhere}.word{display:inline;padding:1px 0;background:transparent;border:0;border-radius:2px;font:inherit;color:inherit;text-align:left}.word:hover,.word.selected{background:#dde8bb;box-shadow:0 2px 0 #7a9251}.sentence-toggle{position:absolute;right:0;top:5px;width:32px;height:36px;display:grid;place-items:center;color:#9aaa8c;font-size:11px;border-radius:4px}.sentence-toggle:hover,.sentence-block.open .sentence-toggle{background:#e3ead2;color:#48663a}.sentence-details{cursor:default;margin:8px 0 13px;font-size:13px}.sentence-translation{color:#5c6f53;padding:8px 0 10px;line-height:1.9}.sentence-notes{display:grid;gap:9px}.sentence-note{background:#fffefa;border:1px solid #e1e6d4;padding:12px 14px;border-radius:5px}.note-head{display:flex;align-items:flex-start;gap:8px;flex-wrap:wrap}.note-kind{font-size:9px;border-radius:3px;background:#f8ebd9;color:#ac8654;padding:2px 5px;white-space:nowrap}.note-kind.pattern{background:#e9ebf4;color:#8588a4}.note-kind.context{background:#e6eddf;color:#7d9470}.note-expression{font-family:Georgia,serif;font-size:15px;color:#425c38}.sentence-note strong{font-size:12px;font-weight:500;display:block;margin:5px 0 3px;color:#708365}.sentence-note p{font-size:11px;color:#929b87;line-height:1.9}.reader-aside{font-size:12px}.reader-aside .aside-card{padding:20px 17px}.reader-aside h3{font-size:16px}.reading-tool{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:18px;font-size:11px;color:#859375}.font-controls{display:flex;align-items:center;gap:8px}.font-controls button{border:1px solid #dce3cf;border-radius:3px;width:29px;height:30px;background:#fffefa}.outline-list{display:flex;flex-direction:column;gap:5px;margin-top:15px}.outline-item{font-size:11px;color:#8b977c;text-align:left;padding:7px 9px;border-left:2px solid #e2e8d7}.outline-item:hover{border-color:#8eaa6b;background:#f4f6ec}.reader-finish{border-top:1px solid var(--line);margin-top:25px;padding-top:23px;display:flex;align-items:center;justify-content:space-between;gap:15px}.reader-finish p{font-size:11px;color:#8f9c80}.source-credit{font-size:9px;color:#a1aa96;line-height:1.8;margin-top:21px;word-break:break-word}.source-credit a{text-decoration:underline}.mobile-reading-tools{display:none}.backdrop{position:fixed;inset:0;background:#152d2777;z-index:80;animation:fade .2s}.word-sheet{position:fixed;z-index:81;background:#fffefa;bottom:24px;left:calc(50% + 112px);transform:translateX(-50%);width:min(520px,calc(100% - 40px));max-height:76dvh;overflow:auto;border-radius:16px;padding:28px 30px;box-shadow:0 10px 80px #122a2833;animation:sheet .2s}.sheet-drag{width:34px;height:4px;background:#dfe4d5;border-radius:4px;margin:-15px auto 22px;display:none}.sheet-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.sheet-word{font:34px Georgia,serif;overflow-wrap:anywhere}.sheet-close{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:#f0f3e8;color:#89997a}.sheet-close .icon{width:16px;height:16px}.sheet-label{font-size:9px;color:#9aaa8a;letter-spacing:1px;margin-bottom:7px}.word-meaning{font-size:19px;margin:12px 0 6px;color:#4c6841}.word-origin{font-size:10px;color:#98a38d}.word-context{border-top:1px solid var(--line);margin-top:20px;padding-top:16px;font:15px/1.8 Georgia,serif;color:#8a9980}.phrase-hint{margin-top:18px;padding:14px 16px;background:#edf2e2;border-radius:7px}.phrase-hint small{font-size:10px;color:#8a9976}.phrase-hint p{font:18px Georgia,serif;margin:5px 0}.phrase-hint span{font-size:12px;color:#7d8f68}.sheet-actions{display:flex;gap:10px;margin-top:24px;flex-wrap:wrap}.sheet-actions .btn{flex:1}.toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);z-index:100;background:#25483e;color:#f5f6ed;padding:12px 22px;border-radius:8px;font-size:12px;opacity:0;pointer-events:none;transition:all .2s;max-width:90vw;box-shadow:0 4px 18px #1a372229}.toast.visible{opacity:1;transform:translate(-50%,0)}.saved-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}.saved-card{border:1px solid var(--line);border-radius:9px;background:#fffefa;padding:21px;min-width:0}.saved-word{font:25px Georgia,serif;overflow-wrap:anywhere}.saved-meaning{font-size:13px;color:#718665;margin:8px 0}.saved-sentence{font:13px/1.8 Georgia,serif;color:#9aa38d;margin:14px 0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.saved-card footer{display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);padding-top:10px;font-size:10px;color:#8e9b7f}.saved-card footer button:hover{color:#b27d54}.profile-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:24px;margin-top:26px}.profile-panel{background:#fffefa;border:1px solid var(--line);padding:27px;border-radius:10px;margin-bottom:20px}.profile-panel h2{font:20px var(--serif);margin-bottom:17px}.profile-panel p{font-size:12px;color:#8a967e;line-height:1.9}.profile-panel .btn{margin-top:18px;margin-right:8px}.profile-stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:22px;text-align:center}.profile-stat-grid strong{display:block;font:32px Georgia,serif;margin-bottom:5px}.profile-stat-grid small{color:#8d9b80;font-size:10px}.history-item{border-top:1px solid var(--line);padding:14px 0;display:flex;justify-content:space-between;gap:15px;font-size:12px}.history-item small{color:#8c9a7d}.danger-btn{font-size:11px;color:#b07b59;margin-top:20px;min-height:36px}.status-pill{padding:3px 9px;border:1px solid #dce4ce;border-radius:20px;font-size:10px;color:#788b65}.resume-card{background:#f1eddf;border:1px solid #e3ddc8;border-radius:10px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:17px 21px;margin-top:22px}.resume-card h3{font:18px Georgia,serif;margin-top:3px}.resume-card small{color:#90957b;font-size:10px}.review-filter{display:flex;gap:10px;font-size:12px;margin-top:22px}.review-filter .tab{border:1px solid var(--line);background:#fffefa}.review-filter .tab.active{background:#e7eed9}.view-hidden{display:none!important}@keyframes fade{from{opacity:0}to{opacity:1}}@keyframes sheet{from{opacity:0;bottom:5px}to{opacity:1;bottom:24px}}
@media(min-width:1500px){.main-inner{padding-left:65px;padding-right:65px}.hero h1{font-size:43px}.hero-copy{padding:40px}.hero{min-height:290px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 300px;gap:35px}.topbar{margin:0 65px}.site-footer{margin:0 65px}.library-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:1180px){.sidebar{width:194px;padding:30px 20px}.workspace{margin-left:194px}.topbar{margin:0 30px}.main-inner{padding:28px 30px}.dashboard-grid{grid-template-columns:minmax(0,1fr) 220px;gap:20px}.level-card{padding:15px 10px}.hero-copy{padding:28px}.hero h1{font-size:29px}.hero{grid-template-columns:1.7fr 1fr}.article-card{padding:17px}.article-card h3{font-size:19px}.library-grid{grid-template-columns:repeat(2,1fr)}.site-footer{margin:0 30px}.reader-container{padding:25px 30px}.reader-layout{grid-template-columns:minmax(0,1fr) 175px;gap:20px}.reading-sheet{padding:27px 25px}.reader-title{font-size:29px}.word-sheet{left:calc(50% + 97px)}}
@media(max-width:1000px){.dashboard-grid{grid-template-columns:1fr}.dash-aside{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding-top:0}.aside-card{margin-bottom:0}.progress-ring{margin:15px auto}.dash-aside .tip-card{display:flex;flex-direction:column;justify-content:center}.level-grid{gap:10px}.level-card{padding:18px}.hero{min-height:240px}.reader-layout{grid-template-columns:1fr}.reader-aside{display:none}.mobile-reading-tools{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:0 0 14px;margin-bottom:18px}.mobile-reading-tools .reading-tool{margin:0}.word-sheet{left:calc(50% + 97px)}.saved-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){body{font-size:13px}.sidebar{display:none}.workspace{margin-left:0}.topbar{height:68px;margin:0 22px}.topbar-left{font-size:12px}.topbar-left:before{content:'句';font:20px var(--serif);background:#244b40;color:#f4f6e8;width:31px;height:33px;display:grid;place-items:center;border-radius:7px 7px 7px 0;margin-right:5px}.topbar-right{gap:0}.topbar-right .date{display:none}.topbar-right .avatar{width:29px;height:29px;font-size:11px}.topbar-right .local-status{display:none}.main-inner{padding:24px 20px 30px}.page-title{font-size:27px}.page-sub{font-size:11px;margin-top:7px}.hero{margin-top:21px;grid-template-columns:1.6fr 1fr;min-height:232px}.hero-copy{padding:24px 21px}.hero h1{font-size:27px;margin:13px 0 11px;line-height:1.6}.hero-copy>p{font-size:10px;margin-bottom:19px;max-width:235px}.hero .eyebrow{font-size:8px;letter-spacing:1.5px}.hero-art{min-height:220px}.hero-art>svg{width:165%;max-width:260px;flex-shrink:0;transform:translateX(5px)}.hero-art .art-note{font-size:6px;letter-spacing:1px;bottom:15px}.hero .btn{font-size:11px;padding:10px 14px;min-height:39px}.section-head{margin-top:27px;margin-bottom:14px}.section-head h2{font-size:20px}.text-link{font-size:11px}.level-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.level-card{padding:14px 10px}.level-no{font-size:23px}.level-card h3{font-size:11px;margin-top:7px;white-space:nowrap}.level-card p{font-size:8px}.level-card footer{font-size:8px;margin-top:10px;padding-top:8px}.ribbon{font-size:7px;right:4px;top:6px;padding:1px 3px}.article-grid{gap:12px}.article-card{padding:17px 15px;border-radius:8px}.article-card h3{font-size:20px}.article-card .zh-title{font-size:11px}.article-card .card-top{margin-bottom:12px}.topic-badge{font-size:8px;max-width:85px;text-align:right}.card-meta{gap:8px;font-size:9px;margin-top:16px;flex-wrap:wrap}.card-bottom{font-size:10px;padding-top:12px;margin-top:14px}.dash-aside{grid-template-columns:1fr 1fr;gap:12px}.aside-card{padding:20px 16px}.aside-card h3{font-size:17px}.tip-card p{font-size:10px}.tip-card .step{font-size:9px;gap:6px}.stats-row small{font-size:8px}.progress-ring{width:90px;height:90px}.progress-ring svg{width:90px;height:90px}.ring-center{font-size:24px}.ring-center small{font-size:8px}.site-footer{margin:0 20px;padding:20px 0 95px;font-size:9px;display:block;text-align:center}.site-footer span{display:block;margin-top:5px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:40;background:#fffefaf5;border-top:1px solid #e3e8d9;backdrop-filter:blur(16px);padding:8px 6px calc(8px + env(safe-area-inset-bottom));justify-content:space-around}.mobile-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-width:58px;min-height:45px;color:#9ba68f;font-size:9px}.mobile-nav a .icon{width:20px;height:20px}.mobile-nav a.active{color:#335a42}.mobile-nav a.active:after{content:'';width:3px;height:3px;background:#335a42;border-radius:50%;position:absolute;top:3px}.library-toolbar{margin-top:24px;gap:18px}.tabs{gap:2px;width:100%;justify-content:space-between}.tab{font-size:11px;padding:7px 15px;min-height:37px}.search-wrap{width:100%;padding:9px 0}.search-wrap input{max-width:none}.library-grid{gap:12px}.library-summary{font-size:10px}.level-explain{font-size:10px;padding:14px 16px}.page-header{gap:10px}.page-header .btn{font-size:10px;padding:9px 12px}.test-shell{padding:28px 20px 35px}.test-intro h1{font-size:28px}.test-intro>p{font-size:12px}.test-features{gap:8px}.test-features strong{font-size:23px}.test-features small{font-size:10px}.question-card{padding:27px 22px}.question-word{font-size:40px}.answer{min-height:54px}.result-bands{gap:6px}.band{padding:13px 5px}.band strong{font-size:20px}.band small{font-size:8px}.reader-container{padding:22px 16px 35px}.reader-breadcrumb{font-size:10px;margin-bottom:16px}.reading-sheet{padding:24px 19px;border-radius:9px}.reader-title{font-size:31px}.reader-zh{font-size:16px}.reader-meta{font-size:9px;gap:12px;margin-bottom:18px}.reading-help{font-size:9px;gap:10px;align-items:flex-start}.reading-help span{max-width:180px}.sentence-en{font-size:var(--reading-size,19px);line-height:2.05}.sentence-block{padding-right:28px}.sentence-toggle{right:-2px;width:29px;min-height:37px}.sentence-note{padding:12px}.sentence-note p{font-size:11px}.sentence-translation{font-size:13px}.reader-finish{flex-direction:column;align-items:stretch}.reader-finish .btn{width:100%}.reader-finish p{text-align:center}.source-credit{font-size:8px}.word-sheet{bottom:0;left:0;transform:none;width:100%;max-height:80dvh;border-radius:19px 19px 0 0;padding:25px 24px calc(25px + env(safe-area-inset-bottom));animation:fade .15s}.sheet-drag{display:block}.sheet-word{font-size:33px}.word-context{font-size:14px}.toast{bottom:95px}.saved-grid{grid-template-columns:repeat(2,1fr);gap:12px}.saved-card{padding:18px 15px}.saved-word{font-size:22px}.saved-meaning{font-size:12px}.saved-sentence{font-size:12px}.profile-grid{grid-template-columns:1fr;gap:0}.profile-panel{padding:23px 20px}.resume-card{padding:16px}.resume-card h3{font-size:16px}.resume-card .btn{white-space:nowrap;font-size:11px;padding:9px 12px}.result-actions{flex-direction:column}.result-actions .btn{width:100%}}
@media(max-width:380px){.hero h1{font-size:24px}.hero-copy{padding:21px 16px}.hero{grid-template-columns:1.8fr 1fr}.hero-copy>p{font-size:9px}.level-card{padding:13px 8px}.level-card h3{font-size:10px}.level-card p{font-size:7px}.level-card footer .icon{display:none}.article-card{padding:15px 12px}.article-card h3{font-size:18px}.card-meta{font-size:8px}.topbar{margin:0 18px}.main-inner{padding-left:16px;padding-right:16px}.test-features small{font-size:9px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.sheet-top-controls{display:flex;gap:8px}.sheet-actions .btn{font-size:12px;padding:12px 10px;white-space:nowrap}.sidebar{overflow-y:auto}.side-plan p{font-size:15px}.level-card footer span{white-space:nowrap}
@media(max-height:800px) and (min-width:761px){.sidebar{padding-top:24px;padding-bottom:24px}.nav-label{margin-top:28px}.side-link{padding-top:9px;padding-bottom:9px}.side-plan{margin-top:24px}.side-plan p{font-size:13px}.side-bottom{margin-top:18px}}