:root{--pine:#214c3f;--pine-2:#2f6b57;--pine-soft:#eaf3ee;--sage:#d7e7dc;--cream:#f6f4ec;--paper:#fffefa;--ink:#20322c;--muted:#75827b;--line:#e1e8e1;--gold:#bb8745;--gold-soft:#f7eddc;--red:#a7473c;--shadow:0 12px 32px rgba(39,68,52,.055);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:var(--cream)}button,input,select,textarea{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #a2c6b1;outline-offset:2px}button:disabled{opacity:.45;cursor:not-allowed}.app-shell{display:flex;min-height:100vh}.sidebar{width:252px;flex:0 0 252px;position:sticky;top:0;height:100vh;overflow:auto;padding:25px 17px 17px;background:#fbfaf5;border-right:1px solid var(--line);display:flex;flex-direction:column}.brand,.mobile-brand{display:flex;align-items:center;gap:11px;border:0;background:transparent;text-align:left;color:var(--ink)}.brand{padding:0 8px 30px}.brand-mark{width:42px;height:42px;border-radius:15px;display:grid;place-items:center;background:var(--pine);color:#f9f5e8;font-weight:900;font-size:21px;box-shadow:0 7px 18px rgba(33,76,63,.16);flex:none}.brand 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13px}.sidebar-mini-mark{display:grid;place-items:center;width:29px;height:29px;background:#fffdf5;color:var(--gold);border-radius:10px;margin-bottom:10px}.sidebar-bottom strong{font-size:12px}.sidebar-bottom p{font-size:11px;line-height:1.65;color:#728077;margin:7px 0 14px}.sidebar-bottom small{font-size:10px;color:#9aa399}.main-column{flex:1;min-width:0}.topbar{height:65px;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,4vw,50px);position:sticky;top:0;z-index:20;background:rgba(250,249,243,.91);backdrop-filter:blur(14px);border-bottom:1px solid rgba(225,232,225,.8)}.topbar-caption{display:flex;align-items:center;gap:9px;color:#77837b;font-size:11px}.online-dot{width:7px;height:7px;border-radius:50%;background:#6e9f75}.topbar-date{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:999px;padding:7px 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p{font-size:12px;color:#d4e3d8;line-height:1.7;margin:0;max-width:450px}.welcome-progress{margin-top:22px;max-width:470px}.progress-caption{display:flex;justify-content:space-between;gap:10px;font-size:10px;color:#d9e7dc;margin-bottom:8px}.progress-track{height:7px;border-radius:20px;background:rgba(255,255,255,.17);overflow:hidden}.progress-fill{height:100%;border-radius:20px;background:#d9e7bc;transition:width .3s}.welcome-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:17px}.welcome-actions .btn{background:#f5f1df;color:var(--pine)}.welcome-actions 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var(--line);background:#fffefa;border-radius:16px;padding:16px;text-align:left;min-height:130px;transition:.15s;display:flex;flex-direction:column}.bipa-card:hover{border-color:#a9cbb6;box-shadow:0 7px 20px rgba(33,76,63,.07);transform:translateY(-2px)}.bipa-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.bipa-n{font-size:10px;font-weight:850;letter-spacing:.5px;color:var(--pine-2);background:var(--pine-soft);padding:6px 8px;border-radius:8px}.bipa-card strong{font-size:13px;margin-bottom:5px}.bipa-card p{margin:0;color:#89948a;font-size:10px;line-height:1.6}.bipa-card-bottom{display:flex;justify-content:space-between;gap:8px;align-items:center;border-top:1px solid #eef1e9;margin-top:auto;padding-top:11px;font-size:10px;color:#78847b}.bipa-card-bottom b{color:var(--pine);font-size:11px}.bipa-note{margin-top:12px;color:#898f84;font-size:10px;line-height:1.7}.shortcut-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px}.shortcut{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid var(--line);background:#fffefa;border-radius:15px;text-align:left;min-width:0}.shortcut:hover{border-color:#b8cfc0;background:#fcfef9}.shortcut-icon{width:38px;height:38px;flex:none;display:grid;place-items:center;border-radius:12px;background:var(--pine-soft);color:var(--pine);font-size:18px}.shortcut strong{display:block;font-size:12px}.shortcut small{display:block;color:#89948c;font-size:10px;margin-top:5px;line-height:1.5}.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}.search-input-wrap{display:flex;align-items:center;gap:10px;min-width:0;flex:1;border:1px solid var(--line);background:#fffefa;border-radius:13px;padding:0 13px;height:46px}.search-input-wrap .magnify{color:#7b887f;font-size:19px}.search-input-wrap input{width:100%;min-width:0;border:0;outline:none;background:transparent;color:var(--ink);font-size:13px}.search-input-wrap input::placeholder{color:#a1aaa0}.select-control{height:42px;border:1px solid var(--line);border-radius:11px;padding:0 11px;background:#fffefa;color:#66776c;font-size:11px;max-width:100%}.chips{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0}.chip{border:1px solid var(--line);background:#fffefa;border-radius:999px;padding:7px 11px;color:#78857b;font-size:10px}.chip.active{background:var(--pine-soft);border-color:#c3daca;color:var(--pine);font-weight:800}.word-list{display:grid;gap:9px}.word-row{display:flex;align-items:center;gap:13px;padding:14px;background:#fffefa;border:1px solid var(--line);border-radius:14px;min-width:0;transition:.14s}.word-row:hover{border-color:#c1d5c6}.word-row-main{flex:1;min-width:0;border:0;background:transparent;text-align:left;padding:0;color:inherit}.word-row-term{display:flex;align-items:center;flex-wrap:wrap;gap:7px;font-size:15px;font-weight:820;line-height:1.45}.word-row-meaning{font-size:12px;color:#63766a;margin-top:4px}.word-row-meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:7px;color:#9aa198;font-size:9px}.tag{display:inline-flex;align-items:center;border-radius:6px;padding:4px 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strong{display:block;color:var(--ink);font-size:14px;margin-bottom:6px}.history-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.history-chip{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:10px;background:#fffefa;padding:8px 10px;color:#607166;font-size:11px}.history-chip:hover{background:var(--pine-soft)}.learning-layout{max-width:900px;margin:0 auto}.learning-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:13px}.learning-step{font-size:11px;color:#7b887e}.learning-progress{height:5px;border-radius:20px;background:#e6eae1;margin-bottom:17px;overflow:hidden}.learning-progress span{display:block;height:100%;background:var(--pine-2);border-radius:20px}.study-card{padding:clamp(22px,4vw,36px);background:#fffefa;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.study-card-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.study-type{font-size:10px;font-weight:800;color:#89948a;letter-spacing:.8px}.study-term{font-size:clamp(30px,5vw,46px);font-weight:850;letter-spacing:-1.8px;line-height:1.2;margin:33px 0 8px;color:var(--pine);overflow-wrap:anywhere}.study-meta{font-size:11px;color:#839084}.study-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:24px}.study-answer{border-top:1px solid #e8ece3;margin-top:22px;padding-top:19px}.study-meaning{font-size:23px;font-weight:830;letter-spacing:-.6px;margin-bottom:9px}.study-note{font-size:11px;color:#859087;line-height:1.6}.example-block{border-radius:13px;padding:14px;background:#f5f5ed;margin-top:15px}.example-id{font-size:13px;line-height:1.8;font-weight:680;color:#33483b;display:flex;align-items:flex-start;gap:8px}.example-zh{font-size:12px;line-height:1.8;color:#7a8478;margin-top:6px}.related-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.related-chip{display:flex;align-items:center;gap:7px;max-width:100%;border:1px solid #e1e8dd;background:#fbfcf7;border-radius:10px;padding:8px 10px;text-align:left;color:#536b5a}.related-chip span{font-size:11px}.related-chip small{color:#8a9488;font-size:10px}.study-rate-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}.study-rate-actions .btn{padding:13px}.celebration{padding:36px 23px;text-align:center;border-radius:22px;background:linear-gradient(145deg,#eaf3eb,#fffdf6);border:1px solid #d9e6d8}.celebration-icon{font-size:33px;margin-bottom:13px}.celebration h2{margin:0 0 8px;font-size:23px;color:var(--pine)}.celebration p{color:#718174;font-size:12px;line-height:1.8;margin:0 auto 17px;max-width:480px}.level-overview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:17px}.level-stat{background:#fffefa;border:1px solid var(--line);border-radius:14px;padding:15px}.level-stat span{display:block;font-size:10px;color:#879187}.level-stat strong{display:block;font-size:23px;color:var(--pine);margin-top:6px}.detail-hero{padding:clamp(22px,4vw,34px);border-radius:22px;background:var(--pine);color:#fffdf4;position:relative;overflow:hidden}.detail-hero:after{content:"";position:absolute;width:180px;height:180px;right:-45px;top:-63px;border:1px solid rgba(255,255,255,.15);border-radius:50%;box-shadow:0 0 0 24px rgba(255,255,255,.03),0 0 0 52px rgba(255,255,255,.02)}.detail-hero>*{position:relative;z-index:1}.detail-word{font-size:clamp(32px,5vw,46px);font-weight:850;letter-spacing:-1.5px;margin:14px 0 9px;overflow-wrap:anywhere}.detail-meaning{font-size:19px;font-weight:750}.detail-meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:13px}.detail-hero .tag{background:rgba(255,255,255,.13);color:#e2eee3}.detail-hero .btn{background:#f8f4e7;color:var(--pine)}.detail-hero .btn-secondary{background:transparent;color:#f4f7ed;border-color:rgba(255,255,255,.25)}.detail-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:19px}.detail-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px;margin-top:14px}.detail-section{padding:19px}.detail-section h3{font-size:13px;margin:0 0 13px}.detail-section p{font-size:12px;line-height:1.8;color:#758177;margin:0}.detail-example{border-top:1px solid #edf0e8;padding:13px 0}.detail-example:first-of-type{border-top:0;padding-top:0}.detail-example .example-id{font-size:13px}.detail-example .example-zh{font-size:12px}.back-link{border:0;background:transparent;color:var(--pine-2);font-size:11px;font-weight:800;padding:8px 0;margin-bottom:10px}.source-note{background:#f7f2e6;border:1px solid #ede1c7;border-radius:10px;padding:11px 13px;color:#867047;font-size:10px;line-height:1.7;margin-top:12px}.grammar-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:16px;align-items:start}.grammar-categories{padding:13px;position:sticky;top:82px}.grammar-cat{width:100%;display:flex;justify-content:space-between;align-items:center;gap:8px;text-align:left;border:0;border-radius:10px;padding:10px;background:transparent;color:#66766b;font-size:11px}.grammar-cat:hover{background:#f2f5ed}.grammar-cat.active{background:var(--pine-soft);color:var(--pine);font-weight:800}.grammar-cat small{font-size:9px;color:#9aa59b}.grammar-main{min-width:0}.grammar-welcome{padding:21px;background:#eaf2e9;border-radius:16px;margin-bottom:14px}.grammar-welcome h2{font-size:18px;color:var(--pine);margin:0 0 8px}.grammar-welcome p{font-size:11px;line-height:1.7;color:#748175;margin:0}.grammar-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.grammar-card{padding:15px;border:1px solid var(--line);background:#fffefa;border-radius:14px;text-align:left;display:flex;flex-direction:column;min-height:152px;transition:.15s}.grammar-card:hover{border-color:#b6d0bd;box-shadow:0 6px 16px rgba(33,76,63,.05)}.grammar-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:13px}.grammar-card strong{font-size:13px;line-height:1.45}.grammar-card p{font-size:10px;line-height:1.65;color:#839086;margin:6px 0 12px}.grammar-pattern{margin-top:auto;background:#f3f5ed;border-radius:8px;padding:8px;color:#607365;font-size:10px;line-height:1.6}.grammar-detail{padding:clamp(20px,4vw,32px)}.grammar-detail h2{font-size:24px;margin:7px 0 10px}.grammar-detail .grammar-intro{font-size:12px;color:#78867b;line-height:1.8;margin:0 0 20px}.grammar-rule{border-left:3px solid var(--pine-2);background:#edf4eb;border-radius:0 12px 12px 0;padding:14px 16px;font-size:14px;line-height:1.75;color:#365641;margin:14px 0}.grammar-examples{display:grid;gap:9px}.grammar-exercise{border:1px solid var(--line);border-radius:14px;padding:16px;margin-top:18px}.grammar-exercise h3{font-size:13px;margin:0 0 10px}.exercise-question{font-size:12px;line-height:1.75;margin-bottom:10px}.exercise-options{display:grid;gap:7px}.exercise-option{padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fffefa;color:#637168;text-align:left;font-size:11px}.exercise-option.correct{border-color:#7fb291;background:#eaf5ec;color:#27593a}.exercise-option.incorrect{border-color:#d5a096;background:#fbefec;color:#9b4c40}.exercise-feedback{font-size:11px;margin-top:10px;color:#738177;line-height:1.7}.review-card{max-width:800px;margin:0 auto;padding:25px}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.setting-card{padding:19px}.setting-card h3{font-size:13px;margin:0 0 7px}.setting-card p{font-size:11px;line-height:1.7;color:#829086;margin:0 0 14px}.field-label{display:block;font-size:10px;color:#7e8b80;font-weight:750;margin:13px 0 6px}.field-control{width:100%;min-height:41px;border:1px solid var(--line);border-radius:10px;background:#fffefa;color:#506258;padding:9px 11px;font-size:12px}.status-line{font-size:10px;color:#829086;line-height:1.7;margin-top:10px}.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,18px);opacity:0;pointer-events:none;z-index:1000;background:#1e3e32;color:#fffdf4;padding:11px 16px;border-radius:12px;box-shadow:0 12px 30px rgba(20,40,30,.2);font-size:12px;transition:.2s;max-width:calc(100vw - 28px);text-align:center}.toast.show{opacity:1;transform:translate(-50%,0)}.footer-note{font-size:10px;color:#9aa399;line-height:1.7;margin-top:20px}.mobile-nav{display:none}
@media(max-width:1100px){.sidebar{width:220px;flex-basis:220px}.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.shortcut-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.bipa-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:780px){.sidebar{display:none}.topbar{height:57px;padding:0 15px}.mobile-brand{display:flex}.mobile-brand strong{font-size:15px}.topbar-caption{display:none}.content{padding:20px 14px 95px}.page-head{align-items:flex-start;flex-direction:column;gap:12px;margin-bottom:18px}.page-title{font-size:25px}.home-grid{grid-template-columns:1fr;gap:12px}.welcome-panel{padding:23px;min-height:235px}.welcome-panel h2{font-size:22px}.checkin-panel{min-height:190px}.metric-grid{gap:8px}.metric-card{padding:13px;min-height:93px}.metric-value{font-size:23px}.bipa-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.bipa-card{padding:12px;min-height:134px}.bipa-card strong{font-size:12px}.bipa-card p{font-size:9px}.bipa-card-bottom{font-size:9px}.shortcut-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.shortcut{padding:12px;gap:9px}.shortcut-icon{width:33px;height:33px}.toolbar{align-items:stretch}.search-input-wrap{flex-basis:100%}.select-control{flex:1}.word-row{padding:12px;gap:9px}.word-row-term{font-size:14px}.row-actions .icon-btn{width:32px;height:32px}.detail-grid{grid-template-columns:1fr}.level-overview{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.level-stat{padding:11px}.level-stat strong{font-size:19px}.grammar-layout{grid-template-columns:1fr;gap:10px}.grammar-categories{position:static;display:flex;gap:6px;overflow:auto;padding:8px}.grammar-cat{width:auto;white-space:nowrap;flex:none;padding:9px 11px}.grammar-cat small{display:none}.grammar-grid{grid-template-columns:1fr}.grammar-card{min-height:unset}.grammar-welcome{padding:16px}.settings-grid{grid-template-columns:1fr}.study-term{margin-top:27px}.study-card{padding:21px}.study-rate-actions{grid-template-columns:1fr 1fr}.mobile-nav{position:fixed;z-index:30;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));padding:6px 5px calc(6px + env(safe-area-inset-bottom));background:rgba(255,254,249,.95);backdrop-filter:blur(14px);border-top:1px solid var(--line)}.mobile-nav button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;min-width:0;border:0;border-radius:10px;background:transparent;color:#879288;padding:4px 1px}.mobile-nav button span{font-size:19px;line-height:1.1}.mobile-nav button small{font-size:9px}.mobile-nav button.active{background:var(--pine-soft);color:var(--pine);font-weight:800}.toast{bottom:76px}.topbar-date{font-size:10px;padding:6px 9px}}
@media(max-width:380px){.content{padding-left:10px;padding-right:10px}.bipa-grid{grid-template-columns:1fr 1fr}.bipa-card{padding:10px}.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.study-rate-actions{grid-template-columns:1fr}.topbar-date{gap:4px}.topbar-date-icon{display:none}}