:root{--ink:#17213b;--muted:#66708c;--paper:#f5f6fb;--white:#fff;--purple:#6c54e8;--purple2:#9b87ff;--green:#27a979;--red:#e65a67;--line:#e7e9f3;--shadow:0 18px 45px rgba(48,46,92,.12)}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",sans-serif}button{font:inherit;cursor:pointer;border:0}header{max-width:1180px;margin:auto;padding:36px 24px 18px;display:flex;justify-content:space-between;align-items:end}h1,h2,p{margin-top:0}h1{font-size:38px;margin-bottom:5px}header p{color:var(--muted);margin:0}.eyebrow{color:var(--purple);font-size:13px;font-weight:800;letter-spacing:1.5px}.profile{display:flex;gap:10px}.profile div,.result-stats div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px 18px;text-align:center}.profile strong,.profile span,.result-stats strong,.result-stats span{display:block}.profile strong{font-size:20px}.profile span,.result-stats span{font-size:11px;color:var(--muted)}main{max-width:1180px;margin:auto;padding:16px 24px 60px}.screen{display:none}.screen.active{display:block}.card{background:var(--white);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}.hero{padding:38px 46px;display:flex;justify-content:space-between;align-items:center;background:linear-gradient(135deg,#fff 58%,#ebe7ff)}.hero h2{font-size:30px;max-width:600px;margin:18px 0 10px}.hero p{color:var(--muted);max-width:570px;line-height:1.8}.pill{background:#eeeafe;color:var(--purple);font-size:12px;font-weight:bold;padding:7px 12px;border-radius:99px}.primary{background:var(--purple);color:#fff;padding:13px 22px;border-radius:13px;font-weight:800;box-shadow:0 7px 18px rgba(108,84,232,.25)}.planet{width:170px;height:170px;border-radius:50%;background:linear-gradient(145deg,var(--purple2),var(--purple));color:white;display:grid;place-content:center;text-align:center;font-size:50px;box-shadow:0 20px 35px rgba(108,84,232,.28);transform:rotate(6deg)}.planet span{display:block;font-size:14px}.section-title{display:flex;justify-content:space-between;align-items:end;margin:38px 0 18px}.section-title h2{margin:5px 0 0}.ghost,.back{background:#fff;color:var(--ink);border:1px solid var(--line);padding:10px 15px;border-radius:12px}.ghost b{background:var(--red);color:#fff;border-radius:99px;padding:2px 7px}.subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.subject{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;text-align:left;transition:.2s}.subject:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.subject .icon{font-size:26px;width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:var(--tint)}.subject h3{margin:18px 0 5px}.subject p{color:var(--muted);font-size:12px}.mini-progress{height:6px;background:var(--line);border-radius:9px;overflow:hidden}.mini-progress i{display:block;height:100%;background:var(--color);width:var(--done)}.notice{margin-top:24px;padding:17px 20px;border:1px dashed #c9c2f5;border-radius:16px;color:var(--muted);display:flex;gap:14px;font-size:13px;line-height:1.6}.notice strong{color:var(--purple);white-space:nowrap}.chapter-list{display:grid;gap:12px}.chapter{background:#fff;border:1px solid var(--line);border-radius:17px;padding:18px 20px;display:flex;align-items:center;gap:15px;text-align:left}.chapter-num{width:38px;height:38px;background:#eeeafe;color:var(--purple);border-radius:12px;display:grid;place-items:center;font-weight:bold}.chapter div:nth-child(2){flex:1}.chapter h3{margin:0 0 5px}.chapter p{margin:0;color:var(--muted);font-size:12px}.chapter-status{color:var(--green);font-size:12px}.quiz-top{display:flex;align-items:center;gap:18px;max-width:820px;margin:0 auto 20px}.progress{height:9px;background:#e1e4ef;border-radius:10px;flex:1;overflow:hidden}.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--purple2),var(--purple));transition:.3s}.quiz-card{max-width:820px;margin:auto;background:#fff;border:1px solid var(--line);border-radius:25px;padding:38px;box-shadow:var(--shadow)}.quest-meta{display:flex;gap:8px}.quest-meta span{font-size:12px;background:#eeeafe;color:var(--purple);padding:5px 9px;border-radius:7px}.story{background:#f7f5ff;border-left:4px solid var(--purple);padding:15px 17px;border-radius:0 12px 12px 0;margin:25px 0 18px;line-height:1.7;color:#4d5672}.quiz-card h2{font-size:23px;line-height:1.55}.options{display:grid;gap:10px;margin:23px 0}.option{padding:15px 17px;text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:13px}.option:hover{border-color:var(--purple2)}.option.correct{background:#eaf9f3;border-color:var(--green);color:#187859}.option.wrong{background:#fff0f1;border-color:var(--red);color:#b33c47}.feedback{display:none;padding:17px;border-radius:13px;margin-bottom:15px;line-height:1.7}.feedback.show{display:block}.feedback.good{background:#eaf9f3;color:#187859}.feedback.help{background:#fff5e9;color:#81551c}.feedback strong{display:block;margin-bottom:4px}.hidden{display:none}.result-card{max-width:620px;margin:40px auto;text-align:center;padding:48px}.result-icon{font-size:60px;color:#f0b936}.result-stats{display:flex;justify-content:center;gap:12px;margin:25px}.result-stats strong{font-size:28px;color:var(--purple)}
@media(max-width:800px){header{align-items:start}.profile div:nth-child(3){display:none}.subject-grid{grid-template-columns:repeat(2,1fr)}.hero{padding:28px}.planet{display:none}.hero h2{font-size:24px}.quiz-card{padding:22px}.notice{display:block}.notice strong{display:block;margin-bottom:6px}}
.secondary{background:#fff;color:var(--purple);padding:12px 18px;border:1px solid #cfc7ff;border-radius:13px;font-weight:800;margin-left:8px}.dashboard-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:15px;margin-top:18px}.plan-card,.today-card{padding:24px}.plan-card h2,.today-card h2{margin:7px 0 8px;font-size:20px}.plan-card p,.screen-intro{color:var(--muted);line-height:1.7}.coverage-line{display:flex;justify-content:space-between;font-size:13px;margin-top:20px}.progress.large{margin:8px 0 18px;height:11px}.today-plan{display:grid;gap:8px}.today-item{display:flex;gap:10px;align-items:center;padding:10px 12px;background:#f7f5ff;border-radius:12px;font-size:13px}.today-item b{color:var(--purple)}.knowledge-map{display:grid;gap:17px}.knowledge-subject{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px}.knowledge-subject h3{margin:0 0 14px}.knowledge-chapter{margin-top:14px}.knowledge-chapter h4{margin:0 0 8px;font-size:14px}.point-list{display:flex;flex-wrap:wrap;gap:7px}.point{padding:7px 10px;border-radius:99px;background:#f1f2f7;color:#59617a;font-size:12px}.point.weak{background:#fff1df;color:#9a5b0c}.point.mastered{background:#e5f8ef;color:#147956}.coach-shell{max-width:900px;margin:auto;padding:28px}.coach-head{display:flex;justify-content:space-between;gap:20px}.coach-head h2{margin:5px 0 18px}.ai-status{font-size:12px;color:var(--green);white-space:nowrap}.coach-actions{display:flex;gap:9px;align-items:end;flex-wrap:wrap;padding:14px;background:#f7f5ff;border-radius:14px}.coach-actions label{font-size:12px;color:var(--muted)}select{display:block;margin-top:5px;padding:9px;border:1px solid var(--line);border-radius:9px;background:#fff}.chat-messages{height:390px;overflow:auto;padding:18px 5px;display:flex;flex-direction:column;gap:10px}.message{max-width:82%;padding:12px 14px;border-radius:15px;line-height:1.7;font-size:14px;white-space:pre-wrap}.message.ai{align-self:flex-start;background:#f0edff}.message.user{align-self:flex-end;background:var(--purple);color:#fff}.message.error{background:#fff0f1;color:#a83e49}.chat-input{display:flex;gap:10px}.chat-input textarea{flex:1;resize:vertical;border:1px solid var(--line);border-radius:13px;padding:12px;font:inherit}.privacy-note{font-size:11px;color:var(--muted);margin:10px 0 0}
@media(max-width:800px){body{font-size:14px;overflow-x:hidden}header{padding:22px 16px 12px;gap:12px;align-items:flex-start}h1{font-size:32px;line-height:1.1}header p{font-size:14px;line-height:1.55;max-width:230px}.eyebrow{font-size:11px;letter-spacing:1px}.profile{gap:6px}.profile div{padding:8px 10px;border-radius:13px;min-width:56px}.profile strong{font-size:17px}.profile span{font-size:9px}main{padding:10px 14px 42px}.hero{padding:22px;border-radius:22px;display:block}.hero h2{font-size:23px;line-height:1.35;margin:15px 0 9px}.hero p{font-size:14px;line-height:1.65}.pill{font-size:10px;padding:6px 9px}.primary,.secondary,.ghost,.back{font-size:13px;padding:11px 13px}.hero .primary,.hero .secondary{display:block;width:100%;margin:8px 0 0}.dashboard-grid{grid-template-columns:1fr;gap:11px;margin-top:12px}.plan-card,.today-card{padding:18px;border-radius:20px;overflow:hidden}.plan-card h2,.today-card h2{font-size:19px;line-height:1.35}.coverage-line{font-size:11px;gap:8px}.plan-card .ghost{white-space:normal}.section-title{margin:28px 0 14px;align-items:center;gap:10px}.section-title h2{font-size:21px;line-height:1.3}.section-title .ghost{white-space:nowrap}.subject-grid{grid-template-columns:repeat(2,1fr);gap:10px}.subject{padding:15px;border-radius:17px}.subject .icon{width:42px;height:42px}.subject h3{margin:13px 0 4px}.notice{display:block;font-size:11px;padding:14px}.notice strong{display:block;margin-bottom:6px}.chapter{padding:14px}.quiz-card{padding:18px;border-radius:20px}.quiz-card h2{font-size:19px}.planet{display:none}.coach-shell{padding:18px}.coach-head{display:block}.coach-actions{display:grid}.coach-actions button,.coach-actions label,.coach-actions select{width:100%}.chat-messages{height:360px;padding:12px 0}.message{max-width:92%;font-size:13px}.chat-input{display:block}.chat-input button{width:100%;margin-top:8px}}
@media(max-width:390px){h1{font-size:29px}header p{max-width:200px}.profile div{min-width:50px;padding:7px}.hero h2{font-size:21px}.section-title h2{font-size:19px}}