:root{--bg:#f7f8f5;--paper:#fff;--ink:#213b32;--muted:#85918a;--green:#285b49;--lime:#e6edb7;--line:#e5e9e3;--red:#b35a49}*{box-sizing:border-box}body{margin:0;background:var(--bg);font:15px/1.6 -apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--ink)}button,input,select,textarea{font:inherit}button,a,input,select,textarea{ -webkit-tap-highlight-color:transparent}button{cursor:pointer;border:1px solid var(--line);background:white;color:var(--ink);border-radius:10px;padding:10px 17px;transition:.15s}button:hover{border-color:#9aac9e;transform:translateY(-1px)}button:disabled{opacity:.5;cursor:default}button.primary{background:var(--green);color:white;border-color:var(--green)}button.soft{background:#edf2e8;border:0}button.danger{color:var(--red)}button.link{padding:0;border:0;background:none;color:var(--green)}a{color:var(--green)}input,select,textarea{border:1px solid var(--line);border-radius:9px;padding:11px 13px;background:white;color:var(--ink);outline:none;max-width:100%}input:focus,textarea:focus,select:focus{border-color:var(--green);box-shadow:0 0 0 3px #285b4910}textarea{width:100%;resize:vertical;min-height:180px}label{display:block;margin:15px 0 6px;font-size:13px;color:#617068}h1,h2,h3,p{margin:0}h1{font-size:30px;letter-spacing:-1px;font-weight:650}h2{font-size:21px;font-weight:600}h3{font-size:16px;font-weight:600}.muted{color:var(--muted);font-size:13px}.eyebrow{font-size:11px;letter-spacing:2px;color:#89998d}.shell{display:grid;grid-template-columns:226px 1fr;min-height:100vh}.sidebar{padding:32px 23px;position:fixed;width:226px;inset:0 auto 0 0;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:5}.brand{display:flex;gap:12px;align-items:center;font-size:25px;font-weight:650;letter-spacing:2px}.brand img{width:40px;height:40px}.brand small{display:block;font-size:10px;letter-spacing:2px;font-weight:400;color:var(--muted)}.navlabel{margin:48px 14px 13px;font-size:11px;color:#98a197}.nav{display:flex;flex-direction:column;gap:8px}.nav button{text-align:left;border:0;background:transparent;padding:12px 15px;color:#758279;display:flex;align-items:center;gap:13px}.nav button.active{background:#edf2e8;color:var(--green);font-weight:600}.ico{font-size:20px;width:24px;text-align:center;font-weight:400}.sidefoot{margin-top:auto;padding-top:30px}.sidecard{padding:18px 15px;background:#f6f7ef;border-radius:12px;margin-bottom:22px;font-size:12px;color:#6c7d68}.sidecard b{display:block;color:var(--green);margin:8px 0}.user{display:flex;align-items:center;gap:9px;padding-top:18px;border-top:1px solid var(--line);font-size:12px}.avatar{background:#e6ebdf;border-radius:50%;width:34px;height:34px;display:grid;place-items:center}.main{grid-column:2;padding:0 45px 40px;max-width:1550px;width:100%;margin:auto}.topbar{height:83px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;margin-bottom:32px;font-size:13px}.dot{display:inline-block;width:6px;height:6px;background:#69996e;border-radius:50%;margin-right:7px}.row{display:flex;align-items:center;gap:12px}.between{justify-content:space-between}.hero{background:#eaf0e3;border-radius:16px;padding:33px 35px;position:relative;overflow:hidden;display:flex;justify-content:space-between;min-height:207px;margin-top:23px}.hero h2{font-size:28px;line-height:1.5;margin:10px 0}.hero p{color:#6a7d68;font-size:13px}.hero button{margin-top:22px}.hero-art{width:220px;min-width:140px;display:grid;place-items:center;position:relative}.book{width:112px;height:130px;border-radius:6px 15px 15px 6px;background:#416e53;transform:rotate(12deg);box-shadow:10px 12px 0 #d0dcc6,14px 17px 0 #aebf9b;position:relative;border-left:8px solid #355c46}.book:before{content:'每日一题';color:#e5efb7;position:absolute;inset:23px 0;text-align:center;font-size:17px;writing-mode:vertical-rl;letter-spacing:5px}.book:after{content:'✦';position:absolute;color:#e8eecb;font-size:37px;bottom:4px;left:23px}.orbit{position:absolute;border:1px solid #cbd8bf;width:200px;height:200px;border-radius:50%}.stats{display:grid;grid-template-columns:repeat(4,1fr);margin:25px 0;gap:16px}.stat{background:white;border:1px solid var(--line);padding:20px 23px;border-radius:12px}.stat .value{font-size:31px;font-weight:600;margin:5px 0;letter-spacing:-1px}.stat small{color:#899287}.stat .value span{font-size:12px;color:var(--muted);margin-left:6px;font-weight:400}.section{margin-top:30px}.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;gap:15px}.filters{display:flex;gap:8px;flex-wrap:wrap}.pill{border-radius:7px;padding:6px 14px;font-size:12px;background:none;border-color:transparent;color:#819087}.pill.active{background:#e7ede1;color:var(--green)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.bank{background:white;border:1px solid var(--line);border-radius:13px;padding:23px;display:flex;flex-direction:column;gap:15px;position:relative}.bank:hover{box-shadow:0 7px 24px #213b3208}.bank-icon{width:43px;height:46px;border-radius:10px;background:#edf1e5;color:#50714f;display:grid;place-items:center;font-size:23px}.tag{font-size:10px;background:#f3f5ee;color:#8b977c;border-radius:4px;padding:3px 7px}.bank h3{margin-bottom:4px}.progress{height:5px;border-radius:9px;background:#eff2eb;overflow:hidden;margin:9px 0}.progress i{display:block;height:100%;background:#6d9062}.bankfoot{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #f0f2ec;padding-top:13px}.bankfoot button{font-size:12px;padding:7px 13px}.bank-new{border:1px dashed #c9d3c2;background:#f7f9f3;display:flex;justify-content:center;align-items:center;min-height:251px;cursor:pointer;text-align:center}.bank-new .plus{font-size:30px;color:#7d9475}.bottomnote{display:flex;justify-content:space-between;margin-top:35px;color:#9aa396;font-size:11px}.empty{padding:50px 25px;text-align:center;color:#85917f;background:#fff;border:1px solid var(--line);border-radius:14px}.panel{background:white;border:1px solid var(--line);border-radius:14px;padding:28px}.two{display:grid;grid-template-columns:1.6fr 1fr;gap:22px}.full{width:100%}.drop{border:1px dashed #aebea4;border-radius:12px;padding:30px;text-align:center;background:#f7f9f3;cursor:pointer}.drop strong{display:block;margin:10px}.steps{display:flex;gap:28px;font-size:12px;color:#82917e;margin:23px 0}.steps b{background:#e7eee0;border-radius:50%;display:inline-grid;place-items:center;width:22px;height:22px;margin-right:6px}.code{font:12px/1.9 ui-monospace,monospace;background:#f5f7f1;padding:18px;border-radius:9px;white-space:pre-wrap;color:#65755d}.preview-item{padding:16px 0;border-bottom:1px solid var(--line);font-size:13px}.error{color:var(--red);background:#fcf0e9;padding:14px;border-radius:9px;font-size:13px;margin:12px 0}.success{color:var(--green);background:#edf4e5;padding:14px;border-radius:9px;margin-top:14px;font-size:13px}.practice-layout{display:grid;grid-template-columns:1fr 260px;gap:24px;margin-top:24px}.question{font-size:20px;line-height:1.8;margin:25px 0;white-space:pre-wrap;overflow-wrap:anywhere}.option{display:flex;align-items:center;text-align:left;width:100%;padding:14px 18px;margin:11px 0;gap:15px;border-radius:10px;white-space:pre-wrap}.option .letter{border:1px solid #dfe5d9;background:#f6f8f1;min-width:29px;height:29px;border-radius:7px;text-align:center;line-height:27px;font-size:13px}.option.selected{border-color:var(--green);background:#f0f5e9}.option.correct{border-color:#73a868;background:#eff7e9}.option.incorrect{border-color:#d39b87;background:#fff1eb}.answerbox{background:#f5f7f0;border-radius:10px;padding:20px;margin:20px 0;font-size:14px;white-space:pre-wrap}.answerbox b{display:block;margin-bottom:9px}.qnums{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:20px}.qnums button{padding:5px;border-radius:6px;font-size:12px}.qnums .active{border-color:var(--green);background:#e6efdc}.qnums .done{background:#eff3e8}.timer{font:32px ui-monospace,monospace;letter-spacing:3px;margin:15px 0;color:var(--green)}.result-score{font-size:72px;color:var(--green);line-height:1.3;font-weight:600}.record{padding:20px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.record strong{font-size:23px}.auth{max-width:1050px;margin:8vh auto;display:grid;grid-template-columns:1.1fr 1fr;min-height:570px;border:1px solid var(--line);border-radius:22px;overflow:hidden;background:white}.auth-story{background:#e7efdd;padding:50px;display:flex;flex-direction:column;justify-content:space-between}.auth-story h1{font-size:42px;line-height:1.5;margin:40px 0 20px}.auth-story .book{margin:50px auto}.auth-form{padding:55px 48px}.auth-form input{width:100%}.auth-form h2{font-size:27px;margin:25px 0 5px}.auth-form button.primary{margin:24px 0 15px;width:100%}dialog{border:1px solid var(--line);border-radius:17px;padding:28px;width:500px;max-width:calc(100vw - 30px);color:var(--ink)}dialog::backdrop{background:#16332866;backdrop-filter:blur(3px)}dialog h2{margin-bottom:10px}dialog input,dialog select{width:100%}dialog .row{margin-top:24px}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);background:#213b32;color:white;padding:12px 23px;border-radius:10px;z-index:50;display:none;font-size:13px;max-width:90vw}footer{margin-top:25px;font-size:11px;color:#9ba395;text-align:center}.search{width:230px}.chapterline{margin-top:20px;display:flex;gap:8px;flex-wrap:wrap}.mobilebrand{display:none}button:focus-visible,a:focus-visible{outline:3px solid #c2d18d;outline-offset:3px}
@media(min-width:1500px){.main{padding-left:65px;padding-right:65px}}@media(max-width:1100px){.main{padding:0 25px 30px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.sidebar{width:195px;padding:28px 16px}.shell{grid-template-columns:195px 1fr}.stats{gap:10px}.stat{padding:15px}.practice-layout{grid-template-columns:1fr 210px}.two{grid-template-columns:1fr}.hero-art{width:180px}}
@media(max-width:720px){body{font-size:14px}.shell{display:block}.sidebar{inset:auto 0 0;width:100%;height:70px;padding:5px 8px;border:0;border-top:1px solid var(--line)}.sidebar .brand,.navlabel,.sidefoot{display:none}.nav{flex-direction:row;justify-content:space-around;gap:0}.nav button{display:flex;flex-direction:column;gap:0;padding:5px 8px;font-size:10px;border-radius:8px}.nav .ico{font-size:21px}.main{padding:0 18px 100px}.topbar{height:66px;margin-bottom:23px}.mobilebrand{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:600}.mobilebrand img{width:28px}.topbar .crumb{display:none}.topbar .muted{font-size:11px}h1{font-size:25px}.hero{padding:24px;min-height:200px}.hero h2{font-size:23px}.hero-art{display:none}.stats{grid-template-columns:repeat(2,1fr);gap:10px;margin:18px 0}.stat{padding:15px 18px}.stat .value{font-size:28px}.grid{grid-template-columns:1fr}.section-head{align-items:flex-start;flex-wrap:wrap}.section-head .row{width:100%;justify-content:space-between}.search{width:100%}.bank-new{min-height:150px}.bottomnote{display:block;line-height:2}.two,.practice-layout{display:flex;flex-direction:column}.practice-layout>.panel:last-child{order:2}.qnums{grid-template-columns:repeat(8,1fr)}.panel{padding:20px}.question{font-size:18px}.auth{display:block;margin:18px;border-radius:15px}.auth-story{padding:25px}.auth-story h1{font-size:25px;margin:20px 0 10px}.auth-story .book,.auth-story>.muted{display:none}.auth-form{padding:25px}.auth-form h2{margin:10px 0}.steps{gap:12px;font-size:11px}.row{flex-wrap:wrap}input,textarea,select{font-size:16px}.auth-story .brand small{display:none}}

.mobile-exit{display:none}@media(max-width:720px){.mobile-exit{display:block;font-size:12px}.mobilebrand{letter-spacing:2px}.topbar{gap:8px}.topbar>.muted{margin-left:auto}}
.sidebar{overflow-y:auto}@media(max-height:800px) and (min-width:721px){.navlabel{margin-top:28px}.nav button{padding:10px 15px}.sidefoot{padding-top:18px}.sidecard{display:none}}