:root{--ink:#20201d;--muted:#74736c;--paper:#f4f1e9;--card:#fffdf8;--line:#ddd8cc;--sage:#607a68;--sage-dark:#315641;--sage-light:#dce4da;--coral:#d76f53;--yellow:#e9c86a;--shadow:0 20px 50px rgba(52,48,39,.09)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}button{cursor:pointer}.hidden{display:none!important}
.app-shell{min-height:100vh;display:grid;grid-template-columns:240px 1fr}.sidebar{position:fixed;inset:0 auto 0 0;width:240px;background:#24382d;color:#f7f4ea;padding:32px 24px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border:1px solid #89a28f;border-radius:50%;font:26px Georgia,serif;color:#f2cf6d}.brand strong{display:block;font:22px Georgia,serif}.brand small{font-size:8px;letter-spacing:1.4px;color:#a9b9ae}.main-nav{display:grid;gap:9px;margin-top:64px}.nav-item{border:0;border-radius:10px;background:transparent;color:#a9b9ae;text-align:left;padding:14px 16px;font-size:14px}.nav-item span{display:inline-block;width:28px;font-size:18px}.nav-item:hover,.nav-item.active{background:rgba(255,255,255,.1);color:#fff}.sidebar-bottom{margin-top:auto}.streak-card{display:flex;align-items:center;gap:12px;border-top:1px solid rgba(255,255,255,.12);border-bottom:1px solid rgba(255,255,255,.12);padding:18px 4px}.streak-icon{color:var(--yellow);font-size:24px}.streak-card strong,.streak-card small{display:block}.streak-card strong{font:22px Georgia,serif}.streak-card small{color:#9caf9f;font-size:11px}.sync-status{display:flex;align-items:center;gap:8px;font-size:10px;color:#a9b9ae;margin-top:18px}.sync-status i{width:7px;height:7px;border-radius:50%;background:#83aa89;box-shadow:0 0 0 3px rgba(131,170,137,.13)}
main{grid-column:2;min-width:0}.topbar{height:90px;padding:0 5vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(100,96,85,.14)}.date-block span,.date-block strong{display:block}.date-block span{font-size:10px;letter-spacing:1.3px;color:var(--muted)}.date-block strong{font:22px Georgia,serif;margin-top:4px}.top-actions{display:flex;align-items:center;gap:12px}.icon-button,.menu-button{border:1px solid var(--line);background:transparent;border-radius:50%;width:40px;height:40px}.menu-button{display:none}.goal-avatar{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--coral);color:#fff;font-weight:700;font-size:11px}
.view{display:none;padding:54px 5vw 80px;max-width:1500px;margin:auto}.view.active{display:block;animation:fadeUp .3s ease}.hero-row{display:flex;justify-content:space-between;align-items:center;gap:40px;margin-bottom:40px}.eyebrow,.step-label{font-size:9px;font-weight:700;letter-spacing:2px;color:var(--sage);margin:0 0 12px}.hero-row h1,.page-title h1{font:clamp(40px,4vw,64px)/1.08 Georgia,"Songti SC",serif;margin:0;letter-spacing:-1px}.hero-row h1 em{color:var(--sage);font-style:italic}.hero-copy,.page-title p:not(.eyebrow){color:var(--muted);font-size:13px;line-height:1.8;max-width:680px;margin:18px 0 0}.day-orbit{width:156px;height:156px;position:relative;display:grid;place-items:center;flex:none}.orbit{position:absolute;border-radius:50%;border:1px solid #c6c6b8}.orbit-one{inset:3px;transform:rotate(-12deg);border-left-color:var(--coral)}.orbit-two{inset:18px;border-style:dashed;opacity:.7}.day-orbit:after{content:"";position:absolute;width:8px;height:8px;background:var(--coral);border-radius:50%;top:24px;right:23px}.orbit-number{font:52px Georgia,serif;margin-top:-12px}.day-orbit small{position:absolute;top:100px;font-size:10px;color:var(--muted);letter-spacing:1px}
.goal-overview{display:grid;grid-template-columns:1fr 1fr;gap:22px}.goal-card,.panel{background:rgba(255,253,248,.92);border:1px solid rgba(200,194,180,.75);border-radius:6px;padding:30px;box-shadow:var(--shadow)}.goal-top,.goal-main,.panel-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.goal-pill{font-size:9px;color:var(--sage-dark);background:var(--sage-light);padding:6px 10px;border-radius:20px}.goal-pill.warm{color:#9e503d;background:#fae1da}.goal-main{align-items:center;margin:16px 0}.goal-main>div:first-child strong,.exam-number strong{display:block;font:52px Georgia,serif}.goal-main>div:first-child span,.exam-number span{font-size:11px;color:var(--muted)}.ring{--progress:0%;width:72px;height:72px;border-radius:50%;background:conic-gradient(var(--sage) var(--progress),#e4e3db 0);display:grid;place-items:center;position:relative}.ring:before{content:"";position:absolute;inset:7px;background:var(--card);border-radius:50%}.ring b{position:relative;font-size:11px}.goal-track,.session-track{height:4px;background:#e5e1d7;overflow:hidden;border-radius:9px}.goal-track i,.session-track i{display:block;width:0;height:100%;background:var(--sage);transition:.3s}.goal-card>p{font-size:12px;color:var(--muted);line-height:1.7;min-height:40px}.review-stack{position:relative;width:72px;height:55px}.review-stack i{position:absolute;width:54px;height:39px;border:1px solid #d8cbbd;background:#f8efe7;border-radius:5px}.review-stack i:nth-child(1){right:0;top:0}.review-stack i:nth-child(2){right:8px;top:7px}.review-stack i:nth-child(3){right:16px;top:14px;background:#fff}.primary-action,.secondary-action,.next-button,.ghost-action,.back-button{border-radius:4px;padding:13px 16px;font-weight:600}.primary-action{width:100%;display:flex;justify-content:space-between;border:0;background:var(--sage-dark);color:#fff}.primary-action:disabled{opacity:.45;cursor:not-allowed}.secondary-action{width:100%;display:flex;justify-content:space-between;border:1px solid var(--ink);background:transparent;color:var(--ink)}
.memory-strip{margin-top:22px;background:#dfe5db;border-radius:6px;padding:28px 35px;display:grid;grid-template-columns:300px 1fr;align-items:center;gap:48px}.memory-strip h2{font:24px/1.25 Georgia,"Songti SC",serif;margin:0}.curve-wrap{position:relative}.curve-wrap svg{width:100%;height:120px;overflow:visible}.curve-line{fill:none;stroke:var(--sage-dark);stroke-width:2}.curve-shadow{fill:none;stroke:#fff;stroke-width:8;opacity:.5}.curve-labels{display:flex;justify-content:space-between;font-size:9px;color:#6d786f}
.page-title{margin-bottom:34px}.library-layout{display:grid;grid-template-columns:1fr 1fr;gap:22px}.panel-heading h2{font:27px Georgia,"Songti SC",serif;margin:0}.word-form{display:grid;gap:14px}.word-form label{display:grid;gap:7px;font-size:11px;font-weight:600}.word-form input,.bulk-panel textarea,.search-box input,.library-toolbar select{border:1px solid var(--line);background:#fff;padding:12px;border-radius:4px;outline:0}.word-form input:focus,.bulk-panel textarea:focus,.search-box input:focus{border-color:var(--sage)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.panel-copy{font-size:12px;color:var(--muted);line-height:1.7}.bulk-panel textarea{width:100%;resize:vertical;line-height:1.7;margin:3px 0 14px}.library-toolbar{display:flex;justify-content:space-between;gap:14px;margin:28px 0 15px}.search-box{flex:1;display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;border-radius:4px;padding-left:12px}.search-box input{border:0;width:100%}.word-table{background:var(--card);border:1px solid var(--line);border-radius:5px;overflow:hidden}.word-row{display:grid;grid-template-columns:minmax(130px,1fr) minmax(220px,2fr) 130px 42px;align-items:center;gap:18px;padding:17px 20px;border-bottom:1px solid #ebe7dd}.word-row:last-child{border-bottom:0}.word-main strong,.word-main small{display:block}.word-main strong{font:22px Georgia,serif}.word-main small,.word-meaning span{font-size:10px;color:var(--muted)}.word-meaning{font-size:12px}.word-meaning span{margin-right:7px;color:var(--coral)}.stage{font-size:10px;color:var(--sage)}.delete-word{border:0;background:transparent;color:#b9a9a1;font-size:18px}.delete-word:hover{color:var(--coral)}.no-words{padding:38px;text-align:center;color:var(--muted);font-size:12px}
.exam-picker{background:var(--card);border:1px solid var(--line);border-radius:6px;box-shadow:var(--shadow);overflow:hidden}.exam-tabs{display:flex;gap:0;border-bottom:1px solid var(--line);overflow:auto}.exam-tabs button{border:0;background:transparent;padding:15px 20px;color:var(--muted);white-space:nowrap}.exam-tabs button.active{background:var(--sage-dark);color:#fff}.exam-summary{padding:28px;display:grid;grid-template-columns:1fr auto 220px;align-items:center;gap:30px}.exam-summary span,.exam-summary small,.exam-summary strong{display:block}.exam-summary>div:first-child>span{font-size:9px;letter-spacing:1.5px;color:var(--sage)}.exam-summary>div:first-child>strong{font:30px Georgia,"Songti SC",serif;margin:5px 0}.exam-summary small{font-size:11px;color:var(--muted)}.exam-number{text-align:center}.exam-word-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}.exam-word{background:rgba(255,253,248,.88);border:1px solid var(--line);padding:18px;border-radius:5px}.exam-word.learned{opacity:.56}.exam-word strong{display:block;font:21px Georgia,serif}.exam-word span{display:block;color:var(--coral);font-size:10px;margin:5px 0}.exam-word p{font-size:12px;margin:0;line-height:1.6}.exam-word small{display:block;color:var(--muted);font-size:10px;margin-top:10px}
.study-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.study-header>div{text-align:right}.study-header span,.study-header strong{display:block}.study-header span{font-size:10px;color:var(--muted)}.study-header strong{font:25px Georgia,serif}.back-button{border:1px solid var(--line);background:transparent}.spelling-card{max-width:760px;margin:45px auto 20px;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:36px;box-shadow:var(--shadow)}.card-kicker{display:flex;justify-content:space-between;color:var(--sage);font-size:9px;letter-spacing:1.7px}.card-kicker button{border:1px solid var(--line);background:transparent;border-radius:50%;width:39px;height:39px}.prompt-area{text-align:center;padding:35px 0}.prompt-area>span{color:var(--coral);font-size:11px}.prompt-area h2{font:clamp(28px,4vw,44px) Georgia,"Songti SC",serif;margin:12px 0}.prompt-area p{font-size:10px;color:var(--muted)}#spellingForm label{font-size:11px;font-weight:600}.spelling-input{display:flex;border-bottom:2px solid var(--ink)}.spelling-input input{width:100%;border:0;background:transparent;outline:0;padding:14px 0;font:28px Georgia,serif}.spelling-input button{border:0;background:var(--sage-dark);color:#fff;padding:0 24px;border-radius:4px 4px 0 0}.answer-feedback{display:flex;gap:15px;align-items:center;background:#edf3ec;padding:18px;border-radius:5px}.answer-feedback.wrong{background:#fae8e3}.feedback-icon{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--sage);color:#fff}.wrong .feedback-icon{background:var(--coral)}.answer-feedback span,.answer-feedback strong,.answer-feedback small{display:block}.answer-feedback span,.answer-feedback small{font-size:10px;color:var(--muted)}.answer-feedback strong{font:25px Georgia,serif;margin:3px 0}.study-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:24px}.ghost-action{border:1px solid var(--line);background:transparent}.next-button{border:0;background:var(--ink);color:#fff}.keyboard-hint{text-align:center;font-size:11px;color:var(--muted)}.keyboard-hint b{color:var(--coral)}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:22px}.stat-grid article{background:var(--card);border:1px solid var(--line);padding:25px;border-radius:5px}.stat-grid span,.stat-grid strong,.stat-grid small{display:block}.stat-grid span{font-size:11px;color:var(--muted)}.stat-grid strong{font:45px Georgia,serif;margin:10px 0}.stat-grid small{font-size:8px;letter-spacing:1.5px;color:var(--sage)}.timeline-panel{margin-top:20px}.upcoming-list{display:grid;gap:0}.upcoming-item{display:grid;grid-template-columns:90px 1fr 100px;gap:20px;padding:14px 0;border-bottom:1px solid #ebe7dd;font-size:12px}.upcoming-item span,.upcoming-item small{color:var(--muted)}
.completion-modal{position:fixed;inset:0;background:rgba(28,31,28,.72);z-index:50;display:grid;place-items:center;padding:20px}.modal-card{width:min(460px,100%);background:var(--card);padding:38px;text-align:center;border-radius:7px}.modal-star{font-size:38px;color:var(--yellow)}.modal-card h2{font:32px Georgia,"Songti SC",serif}.modal-card>p:not(.eyebrow){font-size:12px;color:var(--muted);line-height:1.7}.completion-stats{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);margin:25px 0}.completion-stats div{padding:17px}.completion-stats div+div{border-left:1px solid var(--line)}.completion-stats strong,.completion-stats span{display:block}.completion-stats strong{font:31px Georgia,serif}.completion-stats span{font-size:9px;color:var(--muted)}.modal-card button{width:100%;border:0;background:var(--sage-dark);color:#fff;padding:13px;border-radius:4px}.toast{position:fixed;right:25px;bottom:25px;z-index:60;background:#20201d;color:#fff;padding:13px 18px;border-radius:5px;font-size:12px;transform:translateY(100px);opacity:0;transition:.25s}.toast.show{transform:none;opacity:1}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media(max-width:980px){.app-shell{grid-template-columns:1fr}.sidebar{transform:translateX(-100%);transition:.25s}.sidebar.open{transform:none}main{grid-column:1}.menu-button{display:block}.goal-overview,.library-layout{grid-template-columns:1fr}.memory-strip{grid-template-columns:1fr}.exam-summary{grid-template-columns:1fr auto}.exam-summary .primary-action{grid-column:1/-1}.exam-word-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.topbar{padding:0 20px}.view{padding:38px 20px 65px}.hero-row{align-items:flex-start}.day-orbit{width:105px;height:105px}.orbit-number{font-size:37px}.day-orbit small{top:68px;font-size:8px}.goal-card,.panel,.spelling-card{padding:22px}.form-row,.stat-grid,.exam-word-grid{grid-template-columns:1fr}.word-row{grid-template-columns:1fr 34px;gap:8px}.word-meaning,.stage{grid-column:1}.delete-word{grid-column:2;grid-row:1}.library-toolbar{flex-direction:column}.exam-summary{grid-template-columns:1fr}.exam-number{text-align:left}.memory-strip{padding:24px 20px}.curve-labels{font-size:7px}.spelling-card{margin-top:28px}.study-actions{grid-template-columns:1fr 1fr}}