:root{--paper:#f7f5ec;--green:#e7efe5;--blue:#e7f0f5;--ink:#263d35;--muted:#596c61;--line:#d2dbce;--accent:#345c4b;--white:#fffef9}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font:18px/1.8 'Microsoft YaHei','PingFang SC',sans-serif}a{color:inherit;text-underline-offset:5px}button,input,textarea{font:inherit}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;border:1px solid var(--accent);border-radius:10px;padding:10px 22px;background:var(--accent);color:white;text-decoration:none;cursor:pointer;transition:background .15s}button:hover,.button:hover{background:#254737}button.secondary,.button.secondary{background:transparent;color:var(--accent);border-color:var(--line)}button.secondary:hover,.button.secondary:hover{background:var(--green)}button:disabled{opacity:.55;cursor:not-allowed}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #568fab;outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2{font-family:SimSun,'Songti SC',serif}h1{font-size:48px;line-height:1.4;letter-spacing:1px}h2{font-size:29px;line-height:1.5}h3{font-size:20px}p+p{margin-top:12px}.topbar{max-width:1120px;margin:auto;padding:28px 24px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;gap:12px;align-items:center;font-size:24px;font-weight:bold;text-decoration:none}.brand small{display:block;font-size:10px;letter-spacing:2px;font-weight:normal}.topbar nav{display:flex;gap:24px;font-size:14px;flex-wrap:wrap}.topbar nav a{min-height:44px;display:flex;align-items:center;text-decoration:none}main{max-width:1080px;margin:auto;padding:0 24px 56px}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:center;padding:56px 0 40px}.eyebrow{display:block;font-size:12px;letter-spacing:2px;color:var(--muted);margin-bottom:18px}.hero h1{margin-bottom:24px}.subtle{color:var(--muted);font-size:16px}.today{background:var(--green);padding:32px;border-radius:16px;position:relative;box-shadow:0 4px 0 #d9e4d5}.today:before{content:'';position:absolute;left:24px;right:24px;top:0;border-top:3px solid #89a88b}.today h2{margin:10px 0 12px}.today .button{width:100%;margin:24px 0 12px}.stamp{display:inline-block;border:1px solid #789078;border-radius:6px;padding:3px 9px;font-size:12px;letter-spacing:1px}.progress-band{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:24px;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:48px}.progress-band strong{font-size:28px}.progress-band progress{height:10px;width:100%;accent-color:var(--accent)}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:24px;margin:32px 0 20px}.module{margin:24px 0}.module-head{display:flex;justify-content:space-between;gap:16px;margin-bottom:12px}.module-head h3{font-size:17px}.day-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.day-card{display:flex;flex-direction:column;gap:8px;background:var(--white);border:1px solid var(--line);border-radius:12px;padding:16px;text-decoration:none;min-height:138px;font-size:15px}.day-card:hover{border-color:var(--accent)}.day-card small{font-size:11px;letter-spacing:1px;color:var(--muted)}.day-card .state{font-size:12px;color:var(--accent);margin-top:auto}.day-card.done{background:var(--green)}.day-card.planned{background:transparent;border-style:dashed;color:#677266}.day-card.planned:hover{border-color:var(--line)}.records{margin-top:44px;padding:28px;background:var(--blue);border-radius:16px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.records ul{padding-left:24px}.records li{margin-top:8px}.records small{display:block}.daily-top{padding:32px 0 24px}.daily-top>a{font-size:14px}.daily-title{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:24px 0 8px}.daily-title h1{font-size:40px}.knowledge{background:var(--green);border-left:4px solid #819c7c;border-radius:0 16px 16px 0;padding:24px 28px;margin:20px 0 32px}.knowledge strong{display:block;font-size:20px;margin-bottom:6px}.daily-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:28px;align-items:start}.question{border:1px solid var(--line);border-radius:16px;background:var(--white);padding:32px;margin-bottom:24px;box-shadow:0 4px 18px #263d3504}.question h2{margin:12px 0 20px}.question-text{font-size:24px;line-height:1.9;margin-bottom:24px;overflow-wrap:anywhere}.answer-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:20px 0}.answer-row label{font-size:15px}.answer-row input{width:125px;min-height:50px;border:1px solid #96a796;border-radius:8px;padding:8px 12px;background:#fff;font-size:24px;color:var(--ink)}.feedback{font-size:16px;color:var(--accent);min-height:28px;margin-bottom:12px}details{border-top:1px solid var(--line);margin-top:10px;padding-top:8px}summary{cursor:pointer;min-height:44px;display:list-item;padding:8px 0;font-size:16px}details p,details ol{font-size:16px;margin:12px 0}details ol{padding-left:26px}details li{padding-left:4px;margin-bottom:8px}.solution{background:var(--green);border-radius:10px;padding:16px 20px;margin-bottom:12px}.parent{background:var(--blue);border-radius:16px;padding:24px;font-size:16px}.parent h2{font-size:25px;margin-bottom:16px}.parent p{margin-top:14px}.parent strong{font-size:14px}.reflection{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:28px;margin-top:8px}.reflection h2{margin-bottom:12px}.reflection textarea{display:block;width:100%;min-height:110px;resize:vertical;padding:16px;border:1px solid #96a796;border-radius:10px;background:#fff;margin:16px 0;color:var(--ink)}.check-label{display:flex;gap:10px;align-items:flex-start;margin:18px 0;font-size:16px}.check-label input{width:20px;height:20px;flex-shrink:0;margin-top:5px;accent-color:var(--accent)}.daily-nav{display:flex;justify-content:space-between;gap:16px;margin-top:32px}.storage-note{font-size:13px;color:var(--muted);margin-top:14px}.notice{max-width:1032px;margin:16px auto;padding:14px 20px;background:#fff2d4;border:1px solid #d4b779;border-radius:10px;font-size:15px}footer{max-width:1032px;margin:0 auto;padding:24px 0 36px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:24px;color:var(--muted);font-size:14px}footer small{font-size:12px}.skip{position:absolute;top:-80px;left:16px;padding:12px;background:white;z-index:10}.skip:focus{top:8px}.loading{padding:80px 0}.empty{padding:16px 0}.file-label{cursor:pointer}.file-label input{max-width:100%;display:block;margin-top:12px;font-size:14px}section[id]{scroll-margin-top:24px}@media(max-width:850px){h1{font-size:40px}.hero{gap:24px}.daily-layout{grid-template-columns:minmax(0,1fr)}.parent{order:2}.day-grid{grid-template-columns:repeat(4,1fr)}footer{margin:0 24px;flex-direction:column;gap:8px}.daily-title h1{font-size:34px}}@media(max-width:600px){body{font-size:17px}.topbar{padding:20px 18px;align-items:flex-start;flex-direction:column;gap:10px}.topbar nav{gap:24px}.brand{font-size:22px}main{padding:0 18px 36px}.hero{grid-template-columns:1fr;padding:32px 0;gap:28px}h1{font-size:34px}.hero h1{margin-bottom:16px}.today{padding:26px}.day-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.day-card{min-height:126px}.progress-band{gap:14px;grid-template-columns:auto 1fr}.progress-band>small{grid-column:1/-1}.section-head{display:block}.section-head p{margin-top:8px}.module-head{display:block}.question{padding:24px 20px}.question-text{font-size:22px}.daily-title{display:block}.daily-title .stamp{margin-top:12px}.daily-title h1{font-size:30px}.knowledge{padding:20px}.reflection{padding:22px}.records{padding:22px}.daily-nav{flex-wrap:wrap}.notice{margin:12px 18px}.module-head small{font-size:13px}.actions>*{flex:1}.answer-row button{padding:10px 16px}.daily-top{padding-top:24px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media print{.topbar nav,button,.actions,.daily-nav,footer,.skip{display:none}.hero{display:block}.daily-layout{display:block}body{background:white;font-size:14px}.question{break-inside:avoid}.parent{margin-top:20px}main{padding:0}h1{font-size:28px}}

#next-stage{margin-top:48px}.extension-group{padding:12px 0}.extension-group>summary{font-size:19px;font-weight:bold}.extension-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0}.extension-grid .day-card{padding:24px}.extension-grid p{font-size:15px;line-height:1.8}.extension-grid h3{font-size:20px}@media(max-width:600px){.extension-grid{grid-template-columns:1fr}}