*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI','PingFang SC',Roboto,'Helvetica Neue',sans-serif;}body{background:linear-gradient(145deg,#f9f3e8 0%,#ffe9d6 100%);min-height:100vh;padding:2rem 1.5rem 1rem;display:flex;flex-direction:column;align-items:center;}.course-wrapper{max-width:1300px;width:100%;background:rgba(255,250,240,0.7);backdrop-filter:blur(2px);border-radius:48px 48px 32px 32px;padding:2rem 2rem 1.5rem;box-shadow:0 20px 40px rgba(245,180,120,0.25),0 8px 16px rgba(0,0,0,0.05);border:1px solid #fff6e5;}.header{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;margin-bottom:2rem;border-bottom:3px dashed #fbc4ab;padding-bottom:1rem;}.header h1{font-size:2.2rem;font-weight:700;background:linear-gradient(135deg,#f0937a,#e36f5e);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:1px;text-shadow:0 2px 8px rgba(235,120,80,0.2);display:inline-flex;align-items:center;gap:8px;}.header h1::before{content:"📈";font-size:2.4rem;-webkit-text-fill-color:initial;background:none;}.header-badge{background:#fdd8c4;padding:0.5rem 1.4rem;border-radius:60px;font-weight:600;color:#9f5e4a;font-size:1rem;box-shadow:inset 0 -2px 0 #ecc0aa;border:1px solid #fce3d4;backdrop-filter:blur(2px);}.header-badge i{font-style:normal;background:#e6846a;color:white;border-radius:30px;padding:0 10px;margin-left:6px;}.grid-catalog{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin:1.2rem 0 1.8rem;}.chapter-card{background:#fffffffa;border-radius:28px;padding:0.9rem 1.2rem 0.9rem 1.2rem;box-shadow:0 6px 14px rgba(210,150,120,0.15),0 2px 4px rgba(0,0,0,0.02);transition:all 0.2s ease;border:1px solid #f7e3d6;display:flex;align-items:center;gap:12px;backdrop-filter:blur(2px);min-height:70px;}.chapter-card:hover{transform:translateY(-4px) scale(1.01);box-shadow:0 14px 24px rgba(225,150,110,0.25);border-color:#f3c6b0;background:#fffcf7;}.card-num{flex-shrink:0;width:44px;height:44px;background:linear-gradient(145deg,#fbc4ab,#f7ad91);border-radius:30px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;color:#4f2f24;box-shadow:0 4px 6px rgba(200,120,80,0.2);border:2px solid #ffe3d4;}.card-content{flex:1;min-width:0;}.card-title{font-weight:700;font-size:1.04rem;color:#3d2b22;line-height:1.3;display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 8px;}.card-title .highlight{background:#fde6d8;padding:0 8px;border-radius:30px;font-size:0.75rem;font-weight:600;color:#a55b42;letter-spacing:0.3px;}.card-desc{font-size:0.78rem;color:#6f5548;margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4;opacity:0.85;}.chapter-card a{text-decoration:none;color:inherit;display:flex;align-items:center;gap:12px;width:100%;}.footer{margin-top:1.8rem;text-align:center;font-size:1rem;font-weight:500;color:#7d5f4e;border-top:2px dotted #f5cdbb;padding-top:1.5rem;letter-spacing:1px;background:transparent;}.footer span{background:#fae3d6;padding:0.3rem 2rem;border-radius:60px;display:inline-block;backdrop-filter:blur(2px);box-shadow:0 2px 6px rgba(180,120,80,0.1);}@media (max-width:640px){body{padding:1rem 0.8rem;}.course-wrapper{padding:1.2rem 1rem;}.header h1{font-size:1.8rem;}.grid-catalog{grid-template-columns:1fr;gap:12px;}.chapter-card{padding:0.7rem 0.8rem;}.card-num{width:38px;height:38px;font-size:1rem;}}.header h1::after{content:"✨";font-size:1.8rem;margin-left:6px;-webkit-text-fill-color:initial;background:none;opacity:0.7;}.chapter-card:nth-child(6n+1) .card-num{background:linear-gradient(145deg,#fcd5b0,#f8b894);}.chapter-card:nth-child(6n+2) .card-num{background:linear-gradient(145deg,#fcc9b6,#f5aa8e);}.chapter-card:nth-child(6n+3) .card-num{background:linear-gradient(145deg,#fddac2,#fbc0a4);}.chapter-card:nth-child(6n+4) .card-num{background:linear-gradient(145deg,#fbcbbd,#f3a88c);}.chapter-card:nth-child(6n+5) .card-num{background:linear-gradient(145deg,#fad3c0,#f7b397);}.chapter-card:nth-child(6n) .card-num{background:linear-gradient(145deg,#fcdacb,#f8b99e);}