:root{--bg:#f6f4ef;--card:#fff;--text:#252525;--muted:#6e6e6e;--red:#963d34;--red-dark:#792f29;--gold:#c38c3e;--soft:#f7eae1;--line:#e5ddd4}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.65}button,input{font:inherit}button{cursor:pointer;-webkit-tap-highlight-color:transparent}.app{max-width:900px;margin:auto;padding-bottom:90px}.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 14px;background:rgba(246,244,239,.96);border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.brand{font-weight:800;font-size:1rem}.top-actions{display:flex;gap:8px}.btn{border:0;border-radius:12px;padding:10px 14px;background:#fff;color:var(--text);box-shadow:0 2px 8px rgba(0,0,0,.07)}.btn-primary{background:var(--red);color:#fff}.btn-outline{background:transparent;border:1px solid var(--line);box-shadow:none}.btn-small{padding:8px 10px;font-size:.9rem}.hidden{display:none!important}main{padding:20px 15px 30px}.hero{padding:23px;margin-bottom:18px;border-radius:22px;border:1px solid var(--line);background:linear-gradient(135deg,#fff,#f2e4d9);box-shadow:0 8px 25px rgba(0,0,0,.07)}.hero h1{margin:0 0 5px;line-height:1.2;font-size:clamp(1.8rem,5vw,2.7rem)}.hero p{margin:7px 0;color:var(--muted)}.principle{margin-top:15px;padding:14px 16px;border-left:5px solid var(--gold);border-radius:12px;background:#fff;font-weight:700}.home-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:15px}.search{width:100%;margin-bottom:14px;padding:13px 14px;border:1px solid var(--line);border-radius:14px;background:#fff;font-size:1rem}.lesson-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.lesson-card{width:100%;min-height:120px;padding:17px;border:1px solid var(--line);border-radius:18px;background:#fff;text-align:left;box-shadow:0 4px 14px rgba(0,0,0,.05)}.lesson-card:active{transform:scale(.985)}.lesson-number{display:block;color:var(--red);font-weight:850;font-size:.88rem}.lesson-title{display:block;margin-top:5px;font-size:1.12rem;font-weight:850;line-height:1.35}.lesson-hint{display:block;margin-top:8px;color:var(--muted);font-size:.88rem}.lesson-head{padding:22px;margin-bottom:17px;border-radius:22px;color:#fff;background:linear-gradient(135deg,var(--red),var(--red-dark));box-shadow:0 8px 25px rgba(0,0,0,.09)}.lesson-head .lesson-label{font-weight:750;opacity:.9}.lesson-head h1{margin:4px 0 0;line-height:1.25;font-size:clamp(1.7rem,5vw,2.4rem)}.section{padding:18px;margin:12px 0 18px;border:1px solid var(--line);border-radius:18px;background:#fff}.section h2{margin:0 0 9px;font-size:1.3rem}.section ul{margin:7px 0 0;padding-left:1.3em}.section li{margin:6px 0}.section-title{margin:21px 0 9px;font-size:1.35rem;font-weight:900}.question-card{padding:18px;margin:12px 0;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 4px 14px rgba(0,0,0,.04)}.question-title{margin-bottom:12px;font-size:1.14rem;line-height:1.48;font-weight:850}.follow-btn{display:inline-flex;align-items:center;padding:9px 12px;border:1px solid #dab7a4;border-radius:12px;background:#fff8f3;color:#713a33;font-weight:800}.followup{margin-top:12px;padding:14px 16px;border-radius:14px;background:var(--soft)}.followup-title{color:#703d35;font-weight:900}.followup ul{margin:7px 0 0;padding-left:1.25em}.followup li{margin:6px 0}.leader-note{margin-top:12px;padding:12px 14px;border-left:4px solid var(--gold);border-radius:10px;background:#fff9e9}.lesson-nav{display:flex;gap:9px;margin:22px 0 8px}.lesson-nav button{flex:1}.bottom-bar{position:fixed;left:50%;bottom:0;z-index:35;transform:translateX(-50%);display:flex;gap:9px;width:min(900px,100%);padding:9px 12px calc(9px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:rgba(255,255,255,.97);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.bottom-bar button{flex:1;min-height:48px}.rescue-btn{background:#8e3028;color:#fff}.overlay{position:fixed;inset:0;z-index:70;display:flex;align-items:flex-end;justify-content:center;padding:12px;background:rgba(0,0,0,.48)}.sheet{width:min(760px,100%);max-height:86vh;overflow:auto;-webkit-overflow-scrolling:touch;padding:20px;border-radius:23px 23px 15px 15px;background:#fff;box-shadow:0 22px 60px rgba(0,0,0,.28)}.sheet-head{position:sticky;top:-20px;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:7px 0 12px;background:#fff}.sheet h2{margin:0;font-size:1.45rem}.rescue-list{display:grid;gap:10px;margin-top:10px}.rescue-item{padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:#f8f5f0;font-weight:750}.wait-tip{margin-top:14px;padding:14px;border:1px solid #ead4a5;border-radius:14px;background:#fff6df}.rescue-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:16px}@media(min-width:700px){main{padding:26px 21px 34px}.lesson-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media print{.topbar,.bottom-bar,.lesson-nav,.follow-btn,.home-actions,.search{display:none!important}body{background:#fff}.app{max-width:none;padding:0}.followup{display:block!important}}