body{font-family:Kailasa, "Songti TC", "Times New Roman", 新細明體, "Microsoft Himalaya";font-size:14pt;margin:0;padding:0}#header{height:5rem;color:white;background-color:#7386d5}.header-content{padding:1rem}.site-title{font-size:1.5rem;font-weight:bold;margin:0;text-shadow:2px 2px 4px rgba(0,0,0,0.3);display:inline-block}.sidebar-toggle{color:white}.sidebar-toggle:hover{background:rgba(255,255,255,0.3);color:white;transform:scale(1.05)}.nav-menu{list-style:none;padding:0;margin:0}#container{padding:0}#main{padding:0}#main_content{width:calc(100% - 20rem);padding:1rem;transition:margin-left 0.3s ease-in-out;overflow-y:auto;float:left;display:inline}#main-content.expanded{width:100%}.welcome-card{background:white;border-radius:5px;padding:1rem;box-shadow:0 8px 25px rgba(0,0,0,0.1);margin:1rem;border:1px solid #e9ecef}.feature-card{background:white;border-radius:5px;padding:1rem;margin:1rem;box-shadow:0 4px 15px rgba(0,0,0,0.08);transition:transform 0.3s ease, box-shadow 0.3s ease;border:1px solid #e9ecef}.feature-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,0.15)}footer{border-radius:10px}@media (max-width: 768px){.sidebar{width:280px}.main-content{margin-left:0;padding:1rem}}