:root{color-scheme:light;--ink:#172033;--muted:#5d6c7c;--blue:#0b63ce;--line:#d7e5f0;--paper:#fffdf4;--radius:8px;font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif}
*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#eef9ff,#fff8dd 48%,#f4fff2);color:var(--ink)}.app{width:min(1120px,100%);margin:auto;padding:14px 14px 80px}.hero,.panel,.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 30px rgba(15,23,42,.08)}.hero{padding:24px;margin-bottom:12px}.hero h1{margin:0 0 8px;font-size:clamp(30px,5vw,52px);color:#0f3b57}.lead{line-height:1.7;color:#344256}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.card{padding:14px;text-decoration:none;color:inherit;border-left:7px solid #0ea5e9}.card h2,.card h3{margin:0 0 8px;color:#102a43}.pill{display:inline-flex;align-items:center;min-height:28px;border-radius:999px;background:#eef6ff;border:1px solid #cce4f6;color:#0f4f6d;padding:0 9px;font-weight:900;font-size:12px;margin:0 6px 6px 0}.controls{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:var(--radius);padding:10px;display:grid;grid-template-columns:1fr auto auto;gap:8px;margin:12px 0}input,select,button{min-height:42px;border-radius:var(--radius);font:inherit}input,select{border:1px solid #c6d7e7;padding:0 10px;background:#fff}button,.btn{border:1px solid #bdd7f0;background:#fff;color:#0f3b57;font-weight:900;padding:0 12px;text-decoration:none;display:inline-grid;place-items:center;cursor:pointer}.reader{display:grid;grid-template-columns:270px minmax(0,1fr);gap:12px}.list{max-height:calc(100vh - 104px);overflow:auto;padding:10px}.unitBtn{width:100%;text-align:left;border:1px solid #dbe7f2;background:#fff;margin-bottom:8px;padding:9px;border-radius:var(--radius);cursor:pointer}.unitBtn.active{border-color:#0b63ce;background:#eef6ff}.content{padding:14px}.content h2{font-size:clamp(24px,4vw,38px);margin:0 0 10px}.quad{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.section{border:1px solid #dbe7f2;border-radius:var(--radius);background:#fbfdff;padding:12px}.section h3{margin:0 0 8px;color:#0f3b57}.para{display:grid;gap:8px}.para p{margin:0;border-left:4px solid #d7e5f0;background:#fff;border-radius:0 var(--radius) var(--radius) 0;padding:8px 10px;line-height:1.68}.steps{counter-reset:step;display:grid;gap:8px;margin:0;padding:0}.steps li{list-style:none;counter-increment:step;position:relative;background:#fff;border:1px solid #dbe7f2;border-radius:var(--radius);padding:9px 10px 9px 42px;line-height:1.62}.steps li:before{content:counter(step);position:absolute;left:10px;top:10px;width:23px;height:23px;border-radius:50%;background:#0b63ce;color:#fff;font-weight:900;display:grid;place-items:center;font-size:13px}.status{background:#fff8db;border:1px solid #f5c542;color:#854d0e;border-radius:var(--radius);padding:9px 10px;font-weight:900;margin-bottom:8px}.footer{font-size:12px;color:#64748b;margin-top:16px}@media(max-width:800px){.grid,.reader,.quad,.controls{grid-template-columns:1fr}.list{max-height:240px}.hero{padding:16px}.app{padding:10px 10px 70px}}