*{margin:0;padding:0;box-sizing:border-box;}body{background:#fef9e7;font-family:'Segoe UI','PingFang SC',Roboto,'Helvetica Neue',sans-serif;display:flex;justify-content:center;align-items:center;min-height:100vh;padding:2rem 1rem;}.double-frame{max-width:1100px;width:100%;background:#ffffffdd;backdrop-filter:blur(2px);border:4px solid #f9cb9c;border-radius:48px 48px 32px 32px;padding:12px;box-shadow:0 20px 40px rgba(251,176,64,0.15);transition:all 0.2s ease;}.inner-card{background:#fffcf5;border:4px solid #f4b886;border-radius:36px 36px 24px 24px;padding:2.5rem 2.8rem;box-shadow:inset 0 0 0 2px #fae1c0;}.title-section{margin-bottom:2.2rem;border-bottom:3px dashed #f7c59f;padding-bottom:1.2rem;}.course-badge{display:inline-block;background:#ffdbb5;padding:0.3rem 1.2rem;border-radius:40px;font-size:0.9rem;font-weight:600;color:#7b4a2b;letter-spacing:1px;margin-bottom:0.8rem;border:2px solid #f3b27a;}h1{font-size:2.8rem;font-weight:700;color:#4d2e1b;letter-spacing:-0.3px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;}h1 small{font-size:1.2rem;font-weight:400;color:#b07d5a;background:#faead6;padding:0.2rem 1rem;border-radius:40px;border:2px solid #e7b68b;}h2{font-size:1.8rem;font-weight:600;color:#5c3822;margin:2rem 0 1rem 0;border-left:12px solid #f7b773;padding-left:1rem;}h3{font-size:1.3rem;font-weight:600;color:#6f452b;margin:1.5rem 0 0.8rem 0;}p{font-size:1.1rem;line-height:1.6;color:#3f2a1b;margin-bottom:1rem;}ul,ol{margin:0.8rem 0 1.5rem 1.8rem;font-size:1.05rem;color:#3f2a1b;}li{margin-bottom:0.4rem;}.table-wrap{overflow-x:auto;margin:1.5rem 0 2rem 0;border-radius:24px;background:#fcf3e9;padding:0.2rem;border:2px solid #f5d5b8;}table{width:100%;border-collapse:collapse;background:#fffaf2;border-radius:20px;font-size:1rem;}th{background:#f7dbbc;color:#4d2e1b;font-weight:600;padding:14px 12px;text-align:left;border-bottom:3px solid #efc4a2;}td{padding:12px 12px;border-bottom:1px solid #f0d6c0;color:#3f2a1b;}tr:last-child td{border-bottom:none;}.svg-container{background:#fcf6ed;border-radius:32px;padding:1.2rem 0.8rem;margin:2rem 0 1.8rem 0;border:2px solid #f2cfb2;display:flex;justify-content:center;}svg text{font-family:'Segoe UI','PingFang SC',system-ui,sans-serif;}pre{background:#2d221c;color:#fbe9d7;padding:1.2rem 1.5rem;border-radius:28px;font-size:0.95rem;line-height:1.6;overflow-x:auto;white-space:pre-wrap;word-break:break-word;border:3px solid #dbaa7c;box-shadow:0 6px 0 #b4835b;margin:1.5rem 0;font-family:'JetBrains Mono','Fira Code',monospace;}pre .comment{color:#b7a18a;}footer{margin-top:3rem;padding-top:1.5rem;border-top:3px solid #f5d5b8;text-align:center;font-size:1.2rem;font-weight:500;color:#7b553b;letter-spacing:2px;}footer span{background:#fae2cc;padding:0.2rem 2rem;border-radius:40px;border:2px solid #e7b68b;display:inline-block;}@media (max-width:680px){.inner-card{padding:1.5rem 1.2rem;}h1{font-size:2rem;}h1 small{font-size:1rem;}}.highlight{background:#fae2cc;padding:0.1rem 0.6rem;border-radius:20px;font-weight:500;}.emoji-big{font-size:1.6rem;vertical-align:middle;}