*{box-sizing:border-box;margin:0;padding:0}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#333;background-color:#f5f7fa;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:0 20px}nav{color:#fff;z-index:1000;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);padding:1rem 0;position:sticky;top:0;box-shadow:0 2px 10px #0000001a}nav .container{justify-content:space-between;align-items:center;display:flex}nav .logo{color:#fff;font-size:1.5rem;font-weight:700;text-decoration:none}nav ul{gap:2rem;list-style:none;display:flex}nav ul li a{color:#fff;text-decoration:none;transition:opacity .3s}nav ul li a:hover{opacity:.8}.card{background:#fff;border-radius:12px;margin-bottom:1.5rem;padding:1.5rem;transition:transform .3s,box-shadow .3s;box-shadow:0 4px 6px #0000000d}.card:hover{transform:translateY(-2px);box-shadow:0 8px 15px #0000001a}.news-category{margin-bottom:2rem}.news-category h2{color:#667eea;border-bottom:2px solid #667eea;margin-bottom:1rem;padding-bottom:.5rem}.news-item{border-bottom:1px solid #eee;padding:1rem 0}.news-item:last-child{border-bottom:none}.news-item h3{color:#333;margin-bottom:.5rem}.news-item a{color:#667eea;text-decoration:none}.news-item a:hover{text-decoration:underline}.news-item .meta{color:#666;gap:1rem;margin-top:.5rem;font-size:.9rem;display:flex}.search-container{margin:2rem 0}.search-box{gap:1rem;margin-bottom:2rem;display:flex}.search-box input{border:2px solid #ddd;border-radius:8px;flex:1;padding:1rem;font-size:1rem;transition:border-color .3s}.search-box input:focus{border-color:#667eea;outline:none}.search-box button{color:#fff;cursor:pointer;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border:none;border-radius:8px;padding:1rem 2rem;font-size:1rem;font-weight:700;transition:transform .2s}.search-box button:hover{transform:translateY(-2px)}.social-grid{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-top:2rem;display:grid}.social-card{text-align:center;color:#fff;border-radius:12px;padding:2rem;font-size:1.2rem;font-weight:700;text-decoration:none;transition:transform .3s}.social-card:hover{transform:translateY(-5px)}.social-card.weibo{background:#e6162d}.social-card.wechat{background:#7bb32e}.social-card.qq{background:#12b7f5}.social-card.douyin{background:#000}.social-card.xiaohongshu{background:#fe2c55}.social-card.zhihu{background:#0084ff}.social-card.bilibili{background:#fb7299}.social-card.github{background:#333}@media (width<=768px){nav .container{flex-direction:column;gap:1rem}nav ul{gap:1rem}.search-box{flex-direction:column}.social-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}}