:root{--ink:#18312d;--muted:#70817d;--paper:#f5f1e8;--card:#fffdf8;--green:#1e6b57;--lime:#dce99c;--orange:#ef8d52;--line:#deddd3;--nav:#173d35;--shadow:0 18px 50px rgba(38,53,47,.10)}
*{box-sizing:border-box}body{margin:0;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;background:var(--paper)}button,input,select,textarea{font:inherit}button{cursor:pointer}
.login{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr}.hero{padding:8vw;background:var(--nav);color:#fff;display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden}.hero:after{content:"duc  port  spect  vert";position:absolute;bottom:-20px;left:5%;font:700 8vw Georgia;color:rgba(255,255,255,.04);white-space:nowrap}.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:22px}.logo{width:42px;height:42px;border-radius:14px;background:var(--lime);color:var(--nav);display:grid;place-items:center}.hero h1{font-size:clamp(42px,6vw,76px);line-height:1.06;margin:64px 0 24px;letter-spacing:-3px}.hero p{font-size:18px;line-height:1.8;color:#c9d9d4;max-width:610px}.pillrow{display:flex;gap:10px;flex-wrap:wrap;margin-top:32px}.pill{padding:8px 14px;border:1px solid #54756c;border-radius:99px;color:#d9e6e2;font-size:13px}.loginpanel{display:grid;place-items:center;padding:40px}.loginbox{width:min(430px,100%)}.eyebrow{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--orange);font-weight:800}.loginbox h2{font-size:36px;margin:10px 0}.loginbox>p{color:var(--muted);margin-bottom:32px}.field{display:block;margin:16px 0}.field span{display:block;font-size:13px;font-weight:700;margin-bottom:7px}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:12px;padding:13px 14px;background:#fff}.primary{border:0;background:var(--green);color:#fff;border-radius:12px;padding:13px 18px;font-weight:700}.wide{width:100%}.demo{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:16px}.demo button{border:1px solid var(--line);background:var(--card);padding:11px 5px;border-radius:10px;color:var(--ink)}.hint{font-size:12px;color:var(--muted);text-align:center;margin-top:18px}
.shell{display:grid;grid-template-columns:245px 1fr;min-height:100vh}.sidebar{background:var(--nav);color:#fff;padding:28px 20px;position:fixed;width:245px;height:100vh}.sidebar .brand{margin-bottom:45px}.userbox{padding:16px;border-radius:16px;background:rgba(255,255,255,.07);margin-bottom:24px}.userbox b,.userbox span{display:block}.userbox span{color:#a9c0ba;font-size:12px;margin-top:4px}.nav button{width:100%;display:flex;gap:12px;align-items:center;padding:12px 14px;margin:5px 0;border:0;border-radius:11px;background:transparent;color:#bdd0cb;text-align:left}.nav button.active,.nav button:hover{background:#fff;color:var(--nav)}.logout{position:absolute;bottom:25px;left:20px;width:205px;border:1px solid #4d6d64;background:transparent;color:#d9e3e0;border-radius:10px;padding:10px}.main{grid-column:2;padding:38px 45px;max-width:1500px;width:100%}.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.top h1{margin:0;font-size:30px}.top p{margin:7px 0 0;color:var(--muted)}.datechip{background:var(--card);border:1px solid var(--line);padding:10px 14px;border-radius:12px;font-size:13px}
.grid{display:grid;gap:18px}.stats{grid-template-columns:repeat(4,1fr)}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.stat span{font-size:13px;color:var(--muted)}.stat strong{display:block;font:700 32px Georgia;margin:9px 0 4px}.stat small{color:var(--green)}.sectionhead{display:flex;align-items:center;justify-content:space-between;margin:30px 0 14px}.sectionhead h2{margin:0;font-size:20px}.two{grid-template-columns:1.35fr .65fr}.progress{height:9px;background:#e8e9e1;border-radius:99px;overflow:hidden}.progress i{display:block;height:100%;background:var(--green);border-radius:99px}.task{display:flex;align-items:center;gap:16px;padding:17px 0;border-bottom:1px solid var(--line)}.task:last-child{border:0}.taskicon{width:43px;height:43px;border-radius:13px;background:#e8efd1;display:grid;place-items:center;font-weight:800}.taskmain{flex:1}.taskmain b,.taskmain span{display:block}.taskmain span{font-size:12px;color:var(--muted);margin-top:5px}.badge{font-size:12px;border-radius:99px;padding:6px 9px;background:#edf3ef;color:var(--green)}.orange{background:#fff0e6;color:#b45d2c}.bookgrid{grid-template-columns:repeat(4,1fr)}.book{min-height:155px;display:flex;flex-direction:column;justify-content:space-between}.book .level{font:700 28px Georgia;color:var(--green)}.book p{font-size:13px;color:var(--muted);margin:5px 0}.book footer{display:flex;justify-content:space-between;font-size:12px}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--line);font-size:13px}.table th{color:var(--muted);font-size:12px}.avatar{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--lime);margin-right:8px}.actions{display:flex;gap:8px}.ghost{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 13px;color:var(--ink)}.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.formgrid .full{grid-column:1/-1}.modalshade{position:fixed;inset:0;background:rgba(15,35,30,.48);display:grid;place-items:center;padding:20px;z-index:10}.modal{background:var(--card);border-radius:20px;padding:28px;width:min(620px,100%);max-height:90vh;overflow:auto}.modal h2{margin-top:0}.modalfoot{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}
.learnwrap{max-width:900px;margin:auto}.steps{display:flex;gap:8px;margin-bottom:22px}.step{flex:1;background:#e5e7df;height:7px;border-radius:9px}.step.on{background:var(--green)}.learncard{text-align:center;padding:50px}.rootword{font:700 68px Georgia;color:var(--green);margin:20px}.parts{display:flex;justify-content:center;gap:8px;margin:28px 0}.part{padding:12px 18px;border-radius:12px;background:#edf1e3}.part b,.part small{display:block}.part small{color:var(--muted);margin-top:5px}.meaning{font-size:24px}.story{background:#f4eadc;padding:18px;border-radius:14px;line-height:1.7;text-align:left;margin:20px 0}.family{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}.family span{padding:9px 13px;border:1px solid var(--line);border-radius:10px}.answergrid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:25px 0}.answergrid button{padding:14px;border:1px solid var(--line);background:#fff;border-radius:12px}.answergrid button:hover{border-color:var(--green);background:#eef6f1}.toast{position:fixed;right:30px;bottom:30px;background:var(--nav);color:#fff;padding:13px 18px;border-radius:12px;z-index:20}
.loading{min-height:100vh;display:grid;place-content:center;justify-items:center;gap:12px;color:var(--muted)}.loading .logo{animation:pulse 1.2s infinite}.brand em{font-style:normal;font-size:10px;background:var(--orange);padding:3px 6px;border-radius:99px;color:#fff}.muted{color:var(--muted);font-size:13px}.empty{text-align:center;color:var(--muted);padding:30px}.mini{height:5px;background:#e7e9e2;border-radius:9px;overflow:hidden;margin-top:8px}.mini i{display:block;height:100%;background:var(--green)}.clickable{cursor:pointer}.clickable:hover{background:#f8f6ef}.toastbad{background:#8f3b32}.primary:disabled{opacity:.6;cursor:wait}.tablewrap{overflow:auto}.center{justify-content:center;margin-top:28px}.smallroot{font-size:52px}.reviewcount{font:700 58px Georgia;color:var(--green);margin:25px}@keyframes pulse{50%{transform:scale(1.08);opacity:.65}}
.offline{min-height:100vh;display:grid;place-items:center;padding:24px;background:var(--nav)}.offlinebox{width:min(560px,100%);background:var(--card);border-radius:24px;padding:42px;box-shadow:var(--shadow)}.offlinebox .logo{margin-bottom:22px}.offlinebox h1{font-size:34px;margin:10px 0}.offlinebox p{color:#8f3b32}.offlinebox ol{line-height:2;color:var(--muted);padding-left:22px;margin:24px 0}
.classgrid{grid-template-columns:repeat(3,1fr)}.classcard{display:flex;justify-content:space-between;gap:16px;align-items:flex-end}.classcard h3{font-size:20px;margin:8px 0}.classcard p{color:var(--muted);font-size:12px}.danger{border:1px solid #d8a39d;background:#fff5f3;color:#9a3e35;border-radius:10px;padding:9px 13px}.compact{padding:6px 9px}.bookhero{margin-bottom:18px}.bookhero h2{font-size:30px;margin:10px 0}.wordlist{display:grid;gap:10px}.wordrow{display:grid;grid-template-columns:48px 1fr auto;gap:18px;align-items:center}.wordrow h3{font:700 24px Georgia;margin:0 0 7px}.wordrow h3 small{font:400 13px system-ui;color:var(--muted)}.wordrow p{margin:0 0 6px}.wordrow>div>span{font-size:12px;color:var(--muted)}.wordnum{font:700 18px Georgia;color:var(--orange)}.phonetic{color:var(--muted);margin-top:-12px}.studyhead{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;margin-bottom:14px;font-size:13px}.studyhead .progress{min-width:100px}
.booktools{display:flex;gap:10px;align-items:center;margin-top:18px}.booktools input{flex:1;min-width:180px;border:1px solid var(--line);border-radius:12px;padding:12px 14px}.sourceNote{font-size:11px!important;color:var(--muted)}.pagination{display:flex;justify-content:center;align-items:center;gap:16px;padding:25px}.ghost:disabled{opacity:.4;cursor:not-allowed}
.booktools select{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff}.wordrow em{display:block;margin-top:6px;color:var(--green);font-style:normal}.dictgrid{align-items:start}.dicttool h2{margin:8px 0 12px}.dictrow{display:grid;grid-template-columns:1fr auto;gap:16px}.dictrow h3{font:700 28px Georgia;margin:0 0 8px}.dictrow h3 small{font:400 13px system-ui;color:var(--muted)}.compactparts{justify-content:flex-start;margin:14px 0}.compactparts .part{padding:8px 11px}.translateResult{margin-top:16px;background:#edf3ef;border-radius:12px;padding:15px;line-height:1.8;color:var(--ink);white-space:normal}.exampleZh{color:var(--green);font-size:14px!important;margin-top:-2px!important}
.testitem h3{font-size:18px;line-height:1.5;margin:14px 0}.choice{display:flex;align-items:center;gap:10px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px;cursor:pointer}.choice:hover{border-color:var(--green);background:#eef6f1}.choice input{width:18px;height:18px}.testInput{width:100%;border:1px solid var(--line);border-radius:12px;padding:13px 14px;background:#fff}.wrongAnswer{grid-column:1/-1;padding:16px;background:#fff0e6;color:#9a3e35;border-radius:12px;font-weight:700}
.audioActions{display:flex;justify-content:center;gap:9px;margin:12px 0}.exampleBox{background:#edf3ef;border-left:4px solid var(--green);border-radius:12px;padding:16px;text-align:left;margin:18px 0}.exampleBox p{font-size:17px;line-height:1.6;margin:8px 0}.phraseBox{background:#fff5e9;border-radius:13px;padding:16px;text-align:left;margin:18px 0}.phraseBox>div{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.phraseBox span{padding:7px 10px;background:#fff;border-radius:8px;font-size:13px}.rootLink{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 13px;text-align:left}.rootLink b,.rootLink small{display:block}.rootLink small{color:var(--muted);margin-top:3px}.correctAnswer{grid-column:1/-1;padding:16px;background:#e8f3ed;color:var(--green);border-radius:12px;font-weight:700}.ratingTitle{font-weight:700;margin-top:20px}.ratingGrid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.ratingGrid button{border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px 5px;font-weight:700}.ratingGrid small{display:block;color:var(--muted);font-weight:400;margin-top:5px}
@media(max-width:560px){.ratingGrid{grid-template-columns:1fr 1fr}.audioActions,.booktools{flex-wrap:wrap}.booktools select{width:100%}.dictrow{grid-template-columns:1fr}.dictrow>.badge{justify-self:start}}
@media(max-width:900px){.classgrid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.classgrid{grid-template-columns:1fr}.classcard{align-items:flex-start;flex-direction:column}.wordrow{grid-template-columns:35px 1fr}.wordrow>.badge{grid-column:2}}
@media(max-width:900px){.login{grid-template-columns:1fr}.hero{display:none}.shell{display:block}.sidebar{position:static;width:100%;height:auto}.sidebar .brand{margin-bottom:20px}.userbox{display:none}.nav{display:flex;overflow:auto}.nav button{white-space:nowrap;width:auto}.logout{position:static;width:100%;margin-top:12px}.main{padding:25px 18px}.stats,.bookgrid,.two{grid-template-columns:1fr 1fr}.top{align-items:flex-start}.datechip{display:none}}
@media(max-width:560px){.stats,.bookgrid,.two,.formgrid{grid-template-columns:1fr}.answergrid{grid-template-columns:1fr}.learncard{padding:25px 15px}.rootword{font-size:48px}.parts{flex-wrap:wrap}.main{padding:20px 12px}.demo{grid-template-columns:1fr}}