.mobile-body{background:#f7f8f5;color:#21332d;overscroll-behavior:none}.mobile-app{display:flex;flex-direction:column;margin:0 auto;min-height:100dvh;max-width:520px;padding:max(22px,env(safe-area-inset-top)) 18px max(18px,env(safe-area-inset-bottom))}.mobile-header{align-items:flex-end;display:flex;justify-content:space-between;margin-bottom:20px}.mobile-header p{color:#ee805f;font-size:10px;font-weight:900;letter-spacing:.18em;margin:0 0 6px}.mobile-header h1{font-family:Georgia,Microsoft YaHei,serif;font-size:27px;letter-spacing:-.03em;margin:0}.today-stat{align-items:flex-end;display:flex;flex-direction:column}.today-stat strong{font-family:Georgia,serif;font-size:26px;line-height:1}.today-stat span{color:#83908b;font-size:10px;margin-top:4px}.review-filters{background:#e8efeb;border-radius:12px;display:grid;gap:4px;grid-template-columns:repeat(3,1fr);padding:4px}.review-filters button{background:transparent;border:0;border-radius:9px;color:#52625d;font-size:13px;font-weight:700;padding:9px}.review-filters button.active{background:#fff;box-shadow:0 3px 12px #2039301a;color:#286755}.mobile-error{background:#ffe4dc;border-radius:9px;color:#b93624;font-size:12px;margin:12px 0 0;padding:10px 12px}.review-stage{display:flex;flex:1;padding:22px 0 16px}.review-card{background:#fff;border:1px solid #e2e8e3;border-radius:22px;box-shadow:0 18px 50px #2039301a;display:flex;flex:1;flex-direction:column;min-height:430px;padding:18px}.review-card-topline{color:#75847e;display:flex;font-size:10px;font-weight:700;justify-content:space-between;letter-spacing:.04em}.review-word{align-items:center;display:flex;flex:1;flex-direction:column;justify-content:center;padding:38px 0 26px;text-align:center}.review-card.revealed .review-word{flex:0;padding:24px 0 18px}.review-word h2{font-family:Georgia,serif;font-size:clamp(38px,12vw,58px);letter-spacing:-.04em;margin:0;overflow-wrap:anywhere}.review-word p{color:#75847e;font-family:Georgia,serif;margin:8px 0 0}.review-word.listening-prompt{gap:4px}.listening-icon{align-items:center;background:#f5c7b7;border-radius:50%;color:#286755;display:flex;font-size:29px;height:74px;justify-content:center;margin-bottom:16px;width:74px}.review-word .hidden-word-title{font-family:Microsoft YaHei,system-ui,sans-serif;font-size:25px;letter-spacing:0}.mobile-speak{background:#e9f1ed;border:0;border-radius:999px;color:#286755;font-size:12px;margin-top:18px;padding:9px 14px}.reveal-button{background:#286755;border:0;border-radius:12px;color:#fff;font-size:15px;font-weight:800;padding:15px;width:100%}.review-answer{border-top:1px solid #e2e8e3;display:grid;gap:16px;padding-top:18px}.review-answer h3{color:#ee805f;font-size:10px;letter-spacing:.1em;margin:0 0 7px}.review-answer p{color:#32463f;font-size:14px;line-height:1.55;margin:3px 0}.review-answer b{color:#ee805f;margin-right:4px}.pronunciation-assessment{border:1px solid #e2e8e3;border-radius:12px;padding:12px}.assessment-heading{align-items:center;display:flex;gap:10px;justify-content:space-between}.assessment-heading>div>p{color:#75847e;font-size:10px;line-height:1.4;margin:0}.assessment-heading button{background:#286755;border:0;border-radius:9px;color:#fff;flex:0 0 auto;font-size:11px;font-weight:800;padding:9px 11px}.assessment-heading button:disabled{opacity:.6}.assessment-error{background:#ffe4dc;border-radius:7px;color:#b93624;font-size:11px;margin-top:10px;padding:8px}.assessment-result{align-items:center;border-top:1px solid #e2e8e3;display:flex;gap:12px;margin-top:12px;padding-top:12px}.assessment-result .score{align-items:center;border-radius:50%;display:flex;flex:0 0 auto;font-family:Georgia,serif;font-size:18px;height:48px;justify-content:center;width:48px}.score.good{background:#cfe5da;color:#286755}.score.medium{background:#ffe6a3;color:#8a5700}.score.poor{background:#ffe4dc;color:#b93624}.assessed-word{font-family:Georgia,serif;font-size:24px;font-weight:700;letter-spacing:.04em;line-height:1.1}.assessed-word .correct{color:#286755}.assessed-word .incorrect{color:#d94a35;text-decoration:underline;text-decoration-thickness:2px}.assessment-result small{color:#75847e;display:block;font-size:10px;margin-top:4px}.mobile-collocations{display:grid;gap:6px}.mobile-collocations article{background:#f6ece8;border-radius:6px;color:#67483f;display:grid;gap:2px;padding:6px 8px}.mobile-collocations strong{color:#286755;font-size:12px}.mobile-collocations span{font-size:11px}.mobile-collocations small{color:#75847e;font-size:10px}.mobile-word-image{background:#f5f8fb;border:1px solid #dbe5ed;border-radius:12px;margin:0;overflow:hidden}.mobile-word-image img{display:block;height:190px;object-fit:contain;width:100%}.mobile-word-image figcaption{color:#75847e;font-size:9px;padding:6px 8px}.mobile-example,.mobile-scenario,.mobile-forms{background:#e9f1ed;border-radius:10px;padding:11px 12px}.mobile-example small{color:#6f7781;display:block;font-size:11px;margin-top:4px}.mobile-message,.review-finished{align-items:center;color:#75847e;display:flex;flex:1;flex-direction:column;justify-content:center;text-align:center}.review-finished span{align-items:center;background:#f5c7b7;border-radius:50%;color:#286755;display:flex;font-size:24px;height:58px;justify-content:center;width:58px}.review-finished h2{color:#21332d;font-size:22px;margin:18px 0 6px}.review-finished p{font-size:13px;margin:0}.review-actions{display:grid;gap:10px;grid-template-columns:1fr 1.25fr}.review-actions button{border:0;border-radius:13px;font-size:15px;font-weight:800;padding:15px}.again-button{background:#f6e9e4;color:#9a513c}.known-button{background:#286755;color:#fff}.review-actions button:disabled{opacity:.55}.mobile-home,.mobile-library{gap:16px;padding-bottom:calc(82px + env(safe-area-inset-bottom))}.mobile-home{color:#21332d}.home-topbar{align-items:center;display:flex;justify-content:space-between;padding:2px 2px 8px}.home-topbar b{color:#286755;font-size:13px;letter-spacing:.14em}.home-topbar span{color:#83908b;font-size:10px}.home-action-card{padding-top:6px}.home-primary-button{background:#286755;border:0;border-radius:18px;box-shadow:0 12px 28px #28675533;color:#fff;font-size:17px;font-weight:800;padding:20px;width:100%}.home-primary-button:disabled{background:#c5ceca;cursor:default}.home-progress-card,.home-stats-card{background:#fff;border:1px solid #e2e8e3;border-radius:20px;padding:19px}.home-progress-heading{align-items:center;display:flex;justify-content:space-between}.home-progress-heading>div{display:grid;gap:7px}.home-progress-heading span,.home-stats-card h2{color:#65746f;font-size:11px;font-weight:800;margin:0}.home-progress-heading strong{color:#21332d;font-size:31px;line-height:1}.home-progress-heading strong small{color:#a2aca8;font-size:15px}.home-progress-heading>b{align-items:center;background:#e9f1ed;border-radius:50%;color:#286755;display:flex;font-size:11px;height:46px;justify-content:center;width:46px}.home-progress-track{background:#edf0ed;border-radius:999px;height:8px;margin-top:18px;overflow:hidden}.home-progress-track i{background:#ee805f;border-radius:inherit;display:block;height:100%}.home-progress-card p{color:#83908b;font-size:10px;margin:10px 0 0}.home-progress-card.complete{background:#e9f1ed;border-color:#d4e5dc}.home-progress-card.complete p{color:#286755;font-weight:800}.home-stats-card>div{display:grid;grid-template-columns:repeat(3,1fr);margin-top:19px}.home-stats-card span{display:grid;gap:5px;text-align:center}.home-stats-card span+span{border-left:1px solid #e8ece8}.home-stats-card strong{color:#21332d;font-size:25px}.home-stats-card small{color:#83908b;font-size:10px}.study-plan-card{background:#fff;border:1px solid #e2e8e3;border-radius:18px;box-shadow:0 10px 30px #2039300f;padding:17px}.study-plan-card label>span{color:#75847e;font-size:12px}.study-plan-card h2{font-size:16px;margin:0}.study-plan-card label,.study-plan-card .plan-row{align-items:center;border-bottom:1px solid #e8ece8;display:flex;justify-content:space-between;padding:14px 0}.study-plan-card label b{color:#ee805f}.study-plan-card select{background:#e9f1ed;border:0;border-radius:9px;color:#286755;font-weight:800;padding:8px 10px}.start-study-button{background:#286755;border:0;border-radius:12px;color:#fff;font-size:14px;font-weight:800;margin-top:15px;padding:14px;width:100%}.start-study-button:disabled{opacity:.4}.mobile-bottom-nav{background:#fffffff5;border:1px solid #e2e8e3;border-radius:16px;bottom:max(10px,env(safe-area-inset-bottom));box-shadow:0 10px 35px #2039301f;display:grid;gap:6px;grid-template-columns:repeat(3,1fr);left:18px;padding:5px;position:fixed;right:18px;z-index:5}.mobile-bottom-nav button{background:transparent;border:0;border-radius:11px;color:#75847e;font-weight:800;padding:11px}.mobile-bottom-nav button.active{background:#286755;color:#fff}.mobile-word-list{display:grid;gap:8px}.mobile-word-list article{background:#fff;border:1px solid #e2e8e3;border-radius:13px;padding:13px 14px}.mobile-word-list article>div{align-items:center;display:flex;justify-content:space-between}.mobile-word-list article span,.mobile-word-list article small{color:#75847e;font-size:10px}.reward-screen{align-items:center;justify-content:center;text-align:center}.reward-burst{align-items:center;background:#f5c7b7;border:12px solid #f6e9e4;border-radius:50%;color:#286755;display:flex;font-size:48px;height:125px;justify-content:center;width:125px}.reward-screen>p{color:#ee805f;font-size:10px;font-weight:900;letter-spacing:.18em;margin:28px 0 5px}.reward-screen h1{font-family:Georgia,Microsoft YaHei,serif;margin:0 0 12px}.reward-screen>span{color:#75847e;font-size:12px;margin-top:7px}.reward-home-button,.session-header-actions button{background:transparent;border:0;color:#286755;font-size:11px;margin-top:12px}.session-header-actions{align-items:flex-end;display:flex;flex-direction:column}.plan-settings-link{background:transparent;border:0;color:#286755;font-size:10px;padding:9px 0 0}.mobile-settings{gap:16px;padding-bottom:calc(82px + env(safe-area-inset-bottom))}.settings-card>p{color:#75847e;font-size:11px;margin:6px 0 0}.account-settings{background:#fff;border:1px solid #e2e8e3;border-radius:16px;display:grid;gap:6px;padding:17px}.account-settings span{color:#75847e;font-size:10px}.account-settings button{background:#ffe4dc;border:0;border-radius:9px;color:#b93624;margin-top:8px;padding:10px}.mobile-body{background:#f5f8fc;color:#17243d}.mobile-header p,.review-answer h3,.review-answer b,.study-plan-card label b,.reward-screen>p{color:#3b82f6}.today-stat span,.review-card-topline,.review-word p,.assessment-heading>div>p,.assessment-result small,.mobile-collocations small,.mobile-word-image figcaption,.mobile-message,.review-finished,.home-topbar span,.home-progress-card p,.home-stats-card small,.study-plan-card label>span,.mobile-bottom-nav button,.mobile-word-list article span,.mobile-word-list article small,.reward-screen>span,.settings-card>p,.account-settings span{color:#718096}.review-filters{background:#eaf2ff}.review-filters button{color:#61708a}.review-filters button.active{box-shadow:0 3px 12px #2563eb1f;color:#2563eb}.review-card,.home-progress-card,.home-stats-card,.study-plan-card,.mobile-word-list article,.account-settings{border-color:#dfe7f1}.review-card{box-shadow:0 18px 50px #1e40af17}.listening-icon,.review-finished span,.reward-burst{background:#dbeafe;color:#2563eb}.mobile-speak,.mobile-example,.mobile-scenario,.mobile-forms,.home-progress-heading>b,.study-plan-card select{background:#eaf2ff;color:#2563eb}.reveal-button,.assessment-heading button,.known-button,.home-primary-button,.start-study-button,.mobile-bottom-nav button.active{background:#2563eb}.home-primary-button{box-shadow:0 12px 28px #2563eb38}.home-primary-button:disabled{background:#b9c7da}.review-answer,.pronunciation-assessment,.assessment-result,.home-stats-card span+span,.study-plan-card label,.study-plan-card .plan-row{border-color:#e5ebf3}.review-answer p{color:#34364d}.score.good{background:#dbeafe;color:#1d4ed8}.assessed-word .correct,.home-topbar b,.home-progress-card.complete p,.reward-home-button,.session-header-actions button,.plan-settings-link{color:#2563eb}.mobile-collocations article,.again-button{background:#eef5ff}.mobile-collocations strong{color:#2563eb}.review-finished h2,.mobile-home,.home-progress-heading strong,.home-stats-card strong{color:#17243d}.home-progress-heading span,.home-stats-card h2{color:#61708a}.home-progress-heading strong small{color:#a2a4b2}.home-progress-track{background:#e6edf6}.home-progress-track i{background:#60a5fa}.home-progress-card.complete{background:#edf6ff;border-color:#cfe3fa}.mobile-bottom-nav{border-color:#dfe7f1;box-shadow:0 10px 35px #1e40af1f}.reward-burst{border-color:#eef5ff}@media(min-width:700px){.mobile-app{padding-top:40px}}:root{font-family:Inter,Microsoft YaHei,system-ui,sans-serif;color:#0b3158;background:#fff9e9;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(circle at 82% 0%,#ffe385 0,transparent 30%),radial-gradient(circle at 10% 100%,#dcecf8 0,transparent 26%),#fff9e9}.app-loading,.login-page{align-items:center;display:flex;justify-content:center;min-height:100dvh;overflow-y:auto;padding:clamp(16px,4vw,42px)}.app-loading{color:#716b62}.login-card{background:#fffdf7;border:1px solid #ead8a4;border-radius:22px;box-shadow:0 24px 70px #0b315824;max-width:420px;padding:clamp(24px,4vw,36px);text-align:center;width:100%}.login-mark{align-items:center;background:#ffc928;border-radius:18px;color:#0b3158;display:flex;font-family:Georgia,serif;font-size:clamp(32px,8vw,38px);font-weight:900;height:clamp(60px,16vw,72px);justify-content:center;margin:0 auto 18px;width:clamp(60px,16vw,72px)}.login-card>p{color:#d88700;font-size:10px;font-weight:900;letter-spacing:.18em;margin:0}.login-card h1{font-family:Georgia,Microsoft YaHei,serif;font-size:clamp(30px,8vw,40px);margin:7px 0}.login-card>span{color:#716b62;font-size:12px}.login-card form{display:grid;gap:13px;grid-template-columns:1fr;margin-top:24px;text-align:left}.login-card label{color:#716b62;display:grid;font-size:11px;gap:6px}.login-card input{background:#fff;border:1px solid #d9cda9;border-radius:10px;color:#0b3158;font-size:15px;padding:12px;width:100%}.login-card form small{color:#b93624;text-align:center}.login-card form button{background:#0b3158;border:0;border-radius:11px;color:#fff;font-weight:800;padding:13px;width:100%}@media(max-height:650px){.login-page{align-items:flex-start}.login-mark{margin-bottom:10px}.login-card form{margin-top:16px}}.header-account{align-items:flex-end;display:flex;flex-direction:column;gap:4px}.header-account>span,.header-account>button{color:#716b62;font-size:10px}.header-account>button{background:transparent;border:0;padding:2px 0}button,input{font:inherit}button{cursor:pointer}.app-shell{max-width:980px;margin:0 auto;padding:52px 48px 72px}.app-shell>header{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:36px}.eyebrow{color:#d88700;font-size:11px;font-weight:800;letter-spacing:.18em;margin:0 0 10px}h1{font-family:Georgia,Microsoft YaHei,serif;font-size:44px;line-height:1;letter-spacing:-.04em;margin:0}.subtitle{color:#716b62;margin:12px 0 0}.count{border-left:3px solid #ffc928;display:flex;flex-direction:column;padding-left:20px;min-width:92px}.count strong{font-family:Georgia,serif;font-size:30px}.count span{color:#716b62;font-size:12px}.add-card{background:#fffdf7;border:1px solid #ead8a4;border-radius:18px;box-shadow:0 15px 50px #0b315817;padding:22px}form{display:grid;grid-template-columns:1fr 1.4fr 90px auto;align-items:end;gap:14px}label{color:#5a3423;display:flex;flex-direction:column;font-size:12px;font-weight:700;gap:8px}input,select{background:#fff7db;border:1px solid transparent;border-radius:10px;color:#0b3158;outline:none;padding:13px 14px}input:focus{background:#fff;border-color:#0b3158;box-shadow:0 0 0 3px #ffc92859}form button{background:#0b3158;border:0;border-radius:10px;color:#fff;font-weight:700;padding:13px 20px;white-space:nowrap}form button:hover{background:#061f3b}form button:disabled{cursor:default;opacity:.5}.error{background:#ffe4dc;border-radius:8px;color:#b93624;font-size:13px;margin:14px 0 0;padding:10px 12px}.word-section{margin-top:38px}.section-title{align-items:baseline;display:flex;justify-content:space-between;margin-bottom:12px}.section-title h2{font-family:Georgia,Microsoft YaHei,serif;font-size:21px;margin:0}.section-title span{color:#9c8069;font-size:10px;letter-spacing:.12em;text-transform:uppercase}.word-list{display:grid;gap:8px}.word-row{align-items:center;background:#fffdf7e0;border:1px solid transparent;border-bottom-color:#ead8a4;color:#0b3158;display:flex;justify-content:space-between;padding:16px 18px;text-align:left;transition:.14s ease}.word-row:hover{background:#fffdf7;border-color:#ffc928;border-radius:11px;box-shadow:0 8px 28px #0b315817;transform:translateY(-1px)}.word-row-main,.word-row-meta{align-items:center;display:flex;gap:9px}.word-row-main strong{font-family:Georgia,serif;font-size:22px}.encounter-count{color:#9c6b3c;font-size:11px;min-width:32px;text-align:right}.mastery-badge{background:#eef3f6;border-radius:999px;color:#557087;font-size:10px;font-weight:700;padding:4px 8px}.mastery-badge.mastered{background:#d8efe5;color:#176044}.form-count{color:#557087;font-size:10px}.row-arrow{color:#d88700;font-family:Georgia,serif;font-size:25px;line-height:1}.dialog-backdrop{align-items:center;background:#061f3b6b;display:flex;inset:0;justify-content:center;padding:28px;position:fixed;z-index:20}.dialog-dismiss{background:transparent;border:0;inset:0;padding:0;position:absolute}.word-detail{background:#fffdf7;border:1px solid #ead8a4;border-radius:18px;box-shadow:0 24px 80px #061f3b3d;max-height:calc(100vh - 56px);max-width:780px;overflow-y:auto;padding:24px;position:relative;width:100%;z-index:1}.word-detail-header{align-items:flex-start;display:flex;justify-content:space-between}.word-title-line{align-items:baseline;display:flex;flex-wrap:wrap;gap:10px}.word-detail h3{font-family:Georgia,serif;font-size:27px;margin:0}.pronunciation{color:#7a6f65;font-family:Georgia,serif;font-size:15px}.frequency{border-radius:999px;font-size:11px;font-weight:800;padding:4px 9px}.frequency.essential{background:#ffd9cf;color:#b93624}.frequency.common{background:#ffc928;color:#3f2a17}.frequency.recognition{background:#dcecf8;color:#0b3158}.frequency.discarded{background:#5a3423;color:#fff}.word-meta{align-items:center;color:#9c6b3c;display:flex;font-size:12px;gap:7px;margin-top:7px}.mastery-summary{align-items:center;display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.mastery-summary>span{color:#0b3158;font-size:11px;font-weight:800}.mastery-summary small{color:#716b62;font-size:10px}.mastery-track{display:flex;gap:3px}.mastery-track i{background:#e0e7ec;border-radius:99px;display:block;height:5px;width:20px}.mastery-track i.filled{background:#ffc928}.tag{border-radius:999px;display:inline-block;font-family:Inter,Microsoft YaHei,sans-serif;font-size:10px;font-weight:700;margin-left:0;padding:3px 7px;vertical-align:3px}.tag.reading{background:#dcecf8;color:#0b3158}.tag.listening_speaking{background:#fff0a8;color:#704315}.dialog-close{background:transparent;border:0;color:#9c8069;font-size:28px;line-height:1;padding:0 3px}.word-detail-footer{display:flex;justify-content:flex-end;margin-top:18px}.danger-button{background:transparent;border:0;color:#d94a35;font-size:12px;padding:8px}.word-card-content{border-top:1px solid #ead8a4;display:grid;gap:18px 24px;grid-template-columns:1fr 1fr;margin-top:17px;padding-top:17px}.word-image{background:#f5f8fb;border:1px solid #dbe5ed;border-radius:14px;grid-column:1 / -1;margin:0;overflow:hidden}.word-image img{display:block;height:min(250px,32vh);object-fit:contain;width:100%}.word-image figcaption{color:#716b62;font-size:10px;padding:7px 10px}.word-image figcaption a{color:#0b3158;margin-left:8px}.card-section h4{color:#d88700;font-size:11px;letter-spacing:.08em;margin:0 0 8px}.card-section p,.card-section ul{color:#203c5b;font-size:13px;line-height:1.65;margin:0}.meaning-rows{display:grid;gap:4px}.meaning-rows p{display:flex;gap:8px}.meaning-rows b{color:#d88700;min-width:32px}.forms-section{background:#fff9df;border-radius:10px;padding:12px 14px}.headword-line strong{color:#0b3158;font-family:Georgia,serif;font-size:16px;margin-left:5px}.encountered-forms{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}.encountered-forms>span{background:#fffdf7;border:1px solid #ead8a4;border-radius:8px;display:grid;gap:1px;min-width:95px;padding:6px 8px}.encountered-forms b{color:#0b3158;font-size:12px}.encountered-forms small,.encountered-forms em,.common-form-line{color:#716b62;font-size:9px;font-style:normal}.forms-section .common-form-line{margin-top:8px}.collocations{display:grid;gap:7px}.collocations article{background:#fff0a8;border-radius:7px;color:#5a3423;display:grid;gap:2px;padding:6px 9px}.collocations strong{color:#0b3158;font-size:12px}.collocations span{font-size:12px}.collocations small{color:#716b62;font-size:10px;line-height:1.45}.example-section{background:#eaf4fb;border-radius:10px;padding:12px 14px}.example-section small{color:#6f7781;display:block;margin-top:4px}.scenario-section ul{padding-left:18px}.enrichment-state{background:#fff0a8;border-radius:10px;color:#5a3423;font-size:13px;margin:17px 0 0;padding:12px 14px}.enrichment-state.failed{background:#ffe4dc;color:#b93624}.word-note{border-top:1px dashed #ead8a4;color:#716b62;font-size:12px;margin:16px 0 0;padding-top:12px}.empty{align-items:center;border:1px dashed #d9b64d;border-radius:16px;color:#716b62;display:flex;flex-direction:column;gap:8px;padding:52px;text-align:center}.empty span{color:#d88700;font-family:Georgia,serif;font-size:38px}.empty p{margin:0}@media(max-width:760px){.app-shell{padding:32px 22px}form{grid-template-columns:1fr}.app-shell>header{align-items:flex-start}.count{display:none}.word-card-content{grid-template-columns:1fr}.word-row{align-items:flex-start}.word-row-main,.word-row-meta{align-items:flex-start;flex-wrap:wrap}.word-row .pronunciation,.word-row .encounter-count{display:none}.dialog-backdrop{align-items:flex-end;padding:0}.word-detail{border-radius:20px 20px 0 0;max-height:90vh}}