*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;font-size:16px;line-height:1.5;color:#333;background-color:#f9f9f9}.container{max-width:1200px;margin:0 auto;padding:0 20px}.text-center{text-align:center}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}input,textarea,select{width:100%;padding:10px;border:1px solid #ddd;border-radius:4px;font-size:16px;transition:border-color .2s}input:focus,textarea:focus,select:focus{outline:none;border-color:#4285f4}button{cursor:pointer;font-size:16px;padding:10px 16px;border-radius:4px;border:none;background-color:#4285f4;color:#fff;transition:background-color .2s}button:hover{background-color:#3367d6}button:disabled{background-color:#ccc;cursor:not-allowed}header{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}.card{background-color:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;padding:20px;margin-bottom:20px}main{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:center}.main-content{display:flex;justify-content:center;max-width:1200px;width:100%;margin:0 auto;gap:20px}.left-content{flex:0 0 70%;max-width:800px;background-color:var(--bg-secondary);border-radius:12px;padding:20px;box-shadow:var(--shadow-sm)}.side-feed{flex:0 0 25%;max-width:300px;display:flex;flex-direction:column;gap:20px}.side-feed-section{background-color:var(--bg-secondary);border-radius:12px;padding:20px}.side-feed-section h3{margin-bottom:15px;color:var(--text-primary);font-weight:600}.side-feed-section ul{list-style-type:none;padding:0}.side-feed-section ul li{padding:10px;border-bottom:1px solid var(--border-color);transition:background-color .3s ease}.side-feed-section ul li:hover{background-color:var(--bg-hover);cursor:pointer}.side-feed-section ul li:last-child{border-bottom:none}.main-section{max-width:1200px;margin:0 auto;padding:20px;display:flex;justify-content:center;align-items:center;flex-direction:column}.news-item{font-size:14px;margin-bottom:20px}.news-title{font-size:18px;font-weight:700}.news-meta{font-size:12px;color:#666}.news-excerpt{font-size:14px;margin-top:5px}.profile-icon{cursor:pointer;margin-right:10px}.profile-dropdown{display:none;position:absolute;top:30px;right:0;background-color:#fff;border:1px solid #ccc;z-index:1000}.profile-icon:hover+.profile-dropdown,.profile-dropdown:hover{display:block}@media (max-width: 768px){html{font-size:14px}.container{padding:0 10px}}@media (max-width: 1024px){.main-content{flex-direction:column}.left-content,.side-feed{flex:0 0 100%}}