:root{font-family:Inter,'Noto Sans SC','PingFang SC','Microsoft Yahei',system-ui,sans-serif;color:#1d2844;background:#f5f7fc;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.35;cursor:not-allowed}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip:focus{width:auto;height:auto;clip:auto;background:#fff;z-index:100;padding:12px}
.app-shell{display:grid;grid-template-columns:226px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:#fff;border-right:1px solid #ecedf5;padding:30px 16px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:11px;padding:0 12px 32px}.brand .logo{display:grid;place-items:center;width:40px;height:40px;background:#3d55c9;color:#fff;border-radius:13px;font-size:25px}.brand b{display:block;font-size:19px;letter-spacing:2px}.brand small{display:block;color:#8a94ad;font-size:12px;letter-spacing:2px}.section-label{font-size:11px;font-weight:800;letter-spacing:2px;color:#a2aac1;text-transform:uppercase;margin:0 0 14px;padding-left:12px}.subject-nav{display:grid;gap:7px}.subject-nav button{width:100%;border:0;background:transparent;padding:13px 15px;text-align:left;border-radius:12px;font-weight:650;color:#667188;display:flex;gap:14px;align-items:center}.subject-nav button.active,.subject-nav button:hover{color:#3851bf;background:#eff2ff}.sidebar-bottom{margin-top:auto;border-top:1px solid #ecedf5;padding:19px 10px 0;font-size:12px;color:#59657d;display:flex;gap:7px;align-items:center;flex-wrap:wrap}.sidebar-bottom small{width:100%;color:#acb3c4;padding-left:12px}.dot{height:7px;width:7px;border-radius:50%;background:#e9aa66}
.topbar{height:70px;background:#fff;border-bottom:1px solid #eceef5;padding:0 clamp(20px,4vw,60px);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:#808ba0}.top-actions{display:flex;align-items:center;gap:12px}.connection{display:inline-flex;align-items:center;gap:6px;background:#f1f3fb;border-radius:30px;padding:8px 12px;font-size:12px;color:#596780}.simple-btn{border:1px solid #e1e5f2;color:#4858a9;background:#fff;border-radius:10px;padding:8px 13px}.main{max-width:1170px;margin:auto;padding:29px clamp(18px,4vw,54px) 70px}.welcome{height:218px;display:flex;align-items:center;justify-content:space-between;overflow:hidden;position:relative;border-radius:19px;background:linear-gradient(115deg,#222e70 0%,#4155bf 60%,#8393e4 100%);color:white;padding:26px clamp(25px,4vw,48px)}.welcome h1{font-size:clamp(24px,3vw,36px);line-height:1.4;margin:12px 0;font-weight:800;letter-spacing:.5px}.welcome h1 span{color:#c4d1ff}.welcome p{font-size:14px;color:#d9e0ff;line-height:1.9;margin:0}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:800;color:#c8d0fc}.welcome-shape{font-size:220px;line-height:1;opacity:.15;transform:rotate(23deg);pointer-events:none}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:19px 0 23px}.metric{padding:21px 23px;border-radius:16px;background:white;border:1px solid #edf0f7;box-shadow:0 5px 20px #192d6007}.metric span{font-size:12px;color:#758198;display:block}.metric strong{font-size:29px;font-weight:800;color:#293760;display:block;margin:7px 0}.metric small{color:#a2adc0;font-size:11px}.notice{padding:14px 17px;background:#fff9e9;border:1px solid #f4dfac;border-radius:12px;color:#8a692e;font-size:13px;line-height:1.7}.notice.success{background:#eef9f2;color:#276d49;border-color:#c8e9d2}.notice.warn{background:#fff2f0;color:#b04d3f;border-color:#f4d6cf}
.content-title{display:flex;justify-content:space-between;align-items:end;margin:29px 0 18px}.content-title .section-label{padding:0;margin:0}.content-title h2{font-size:24px;margin:7px 0 0}.outline-btn{background:#fff;border:1px solid #dce2f0;border-radius:10px;padding:10px 15px;color:#465bb5;font-weight:650}.outline-btn:hover{background:#f0f3ff}.filters{display:flex;gap:12px;margin-bottom:16px}.search{display:flex;align-items:center;gap:11px;background:#fff;border:1px solid #e1e6ef;border-radius:11px;padding:0 15px;flex:1;color:#9ca8bb}.search input{outline:0;border:0;padding:13px 0;width:100%;min-width:0;color:#27334c}.filter-label{display:flex;align-items:center;gap:8px;color:#7b859a;font-size:12px}.filter-label select{padding:12px 10px;border:1px solid #e1e6ef;border-radius:10px;background:#fff;color:#556075}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.card{background:#fff;border:1px solid #ebedf3;border-radius:15px;padding:21px;box-shadow:0 5px 18px #14235b06;min-width:0}.card-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.chip{font-size:11px;font-weight:700;border-radius:7px;padding:5px 9px;background:#edf0ff;color:#5062bf}.chip.语文{background:#fff1e9;color:#bb754c}.chip.英语{background:#ebf8f2;color:#2c8a69}.chip.计划{background:#f7f0ff;color:#885fb6}.date{font-size:11px;color:#a5afbe}.card h3{font-size:17px;margin:16px 0 10px}.snippet{line-height:1.85;color:#626f86;font-size:13px;white-space:pre-wrap;overflow-wrap:anywhere;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;min-height:90px}.card.expanded .snippet{display:block;max-height:none}.card-controls{display:flex;gap:9px;justify-content:space-between;align-items:center;margin-top:14px;border-top:1px solid #eff0f5;padding-top:13px}.text-btn{border:0;background:none;font-size:12px;color:#5062bf;font-weight:750;padding:8px 2px}.star{color:#adbad1}.star.active{color:#ecad4a}.review-pill{border:1px solid #e8eaf0;background:#f9fafc;border-radius:9px;padding:7px 10px;color:#6d7893;font-size:11px}.pagination{display:flex;gap:18px;align-items:center;justify-content:center;margin:26px auto;color:#8891a7;font-size:12px}.empty{grid-column:1/-1;border:1px dashed #cbd3e4;border-radius:14px;padding:58px 18px;text-align:center;color:#76849f;background:#fff}.empty h3{color:#455275;margin:0 0 8px}footer{font-size:12px;line-height:1.9;color:#9ca5b9;margin-top:30px}.bottom-nav{display:none}
.dialog{width:min(440px,calc(100vw - 26px));border:0;border-radius:19px;padding:28px;background:#fff;box-shadow:0 20px 90px #17214938;color:#26324b}.dialog::backdrop{background:#0a173ca1}.dialog h2{font-size:22px;margin:11px 0}.dialog p{font-size:13px;color:#738199;line-height:1.75}.modal-top{display:flex;justify-content:space-between;align-items:center}.modal-glyph{display:grid;place-items:center;width:37px;height:37px;background:#eef1ff;color:#4058c6;border-radius:12px;font-size:20px}.icon-button{border:0;background:#f5f6fa;border-radius:8px;width:30px;height:30px;font-size:20px;color:#69758b}.field{display:grid;gap:8px;font-size:12px;font-weight:700;color:#495672;margin:22px 0 14px}.field input{border:1px solid #dfe4f1;border-radius:10px;padding:13px;color:#28324e}.hint{font-size:12px;color:#8793a8;margin:12px 0;line-height:1.6}.primary-btn{width:100%;background:#4459c7;color:#fff;padding:13px;border:0;border-radius:10px;font-weight:700}.quiz-choices{display:grid;gap:10px;margin:16px 0}.quiz-choice{padding:13px;border:1px solid #e5e7f0;background:#fafbff;border-radius:11px;text-align:left;color:#34405f}.quiz-choice:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #98a5eb;outline-offset:2px}.quiz-choice.correct{background:#effaf4;border-color:#9dd7b5;color:#276744}.quiz-choice.incorrect{background:#fff1f0;border-color:#efb4ac;color:#9d382c}.feedback{font-size:13px;color:#536285;line-height:1.7;min-height:35px;margin:13px 0}
@media(max-width:1050px){.sidebar{width:180px;padding:26px 10px}.app-shell{grid-template-columns:180px 1fr}.cards{grid-template-columns:1fr}}@media(max-width:720px){.app-shell{display:block}.sidebar{display:none}.topbar{height:58px;padding:0 18px}.main{padding:19px 15px 100px}.welcome{height:180px;padding:20px 23px}.welcome h1{font-size:24px}.welcome-shape{font-size:120px}.metrics{gap:8px;margin-top:12px}.metric{padding:15px 11px}.metric strong{font-size:23px}.metric span{font-size:11px}.metric small{font-size:10px}.cards{grid-template-columns:1fr}.content-title h2{font-size:22px}.filters{flex-wrap:wrap}.filter-label{width:100%;justify-content:end}.bottom-nav{display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid #eceef6;position:fixed;bottom:0;left:0;right:0;z-index:10;padding:8px 8px max(8px,env(safe-area-inset-bottom))}.bottom-nav button{display:grid;gap:3px;justify-items:center;place-content:center;border:0;background:none;color:#8490a5;font-size:22px;min-height:48px}.bottom-nav button small{font-size:10px}.bottom-nav button.active{color:#3c55c4}footer{padding-bottom:15px}.welcome-copy{position:relative;z-index:1}}
.notice-row{display:flex;align-items:center;gap:10px}.notice-row .notice{flex:1;min-width:0}.notice-row button{flex:none}.card-kind{color:#7986a2;font-size:11px}.filters{flex-wrap:wrap}.search{min-width:180px}.topbar>span{min-width:0}.card-controls{flex-wrap:wrap}.snippet{overflow-wrap:anywhere}main{min-width:0}.welcome-copy{min-width:0}
@media(max-width:380px){.connection{display:none}.welcome{padding:18px}.welcome h1{font-size:21px}.welcome-shape{display:none}.top-actions{gap:6px}.topbar{padding:0 12px}.notice-row{align-items:stretch;flex-direction:column}.metric span{font-size:10px}.card{padding:16px}.filters .filter-label{width:auto;flex:1}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}