*{margin:0;padding:0;box-sizing:border-box;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Open Sans","Helvetica Neue",sans-serif}body{background-color:#f5f5f5;color:#333;line-height:1.6;padding-top:56px;padding-bottom:60px}.header{position:fixed;top:0;left:0;right:0;height:56px;background-color:white;display:flex;align-items:center;padding:0 16px;box-shadow:0 2px 4px rgba(0,0,0,0.1);z-index:100}.menu-btn{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:none;border:none;cursor:pointer;margin-right:8px}.menu-btn:active{background-color:#f0f0f0}.search-container{flex:1;position:relative;margin:0 8px}.search-input{width:100%;height:40px;border-radius:20px;border:none;background-color:#f0f0f0;padding:0 16px 0 40px;font-size:14px;outline:none}.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:#999}.user-btn{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:none;border:none;cursor:pointer;margin-left:8px}.user-btn:active{background-color:#f0f0f0}.sidebar{position:fixed;top:56px;left:0;bottom:0;width:80%;max-width:300px;background-color:white;transform:translateX(-100%);transition:transform .3s ease;overflow-y:auto;z-index:101;box-shadow:2px 0 10px rgba(0,0,0,0.1)}.sidebar.open{transform:translateX(0)}.sidebar-title{padding:16px;font-size:14px;color:#999;font-weight:500}.accordion{border-top:1px solid #f0f0f0}.accordion-item{border-bottom:1px solid #f0f0f0}.accordion-header{padding:16px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-weight:500}.accordion-header:active{background-color:#f9f9f9}.accordion-icon{transition:transform .3s ease;color:#999}.accordion-icon.rotate{transform:rotate(180deg)}.accordion-content{max-height:0;overflow:hidden;transition:max-height .3s ease}.accordion-content.open{max-height:1000px}.accordion-list{list-style:none}.accordion-list li{padding:12px 16px 12px 32px}.accordion-list a{text-decoration:none;color:#333;display:block}.accordion-list a.active{color:#007AFF;border-left:3px solid #007AFF;padding-left:12px}.accordion-list a:active{background-color:#f0f0f0}.overlay{position:fixed;top:56px;left:0;right:0;bottom:0;background-color:rgba(0,0,0,0.5);z-index:100;display:none}.overlay.show{display:block}.article-container{background-color:white;margin:16px;border-radius:12px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,0.05)}.article-image{width:100%;height:200px;object-fit:cover;display:block}.article-category{position:absolute;top:16px;left:16px;background-color:#007AFF;color:white;font-size:12px;padding:4px 8px;border-radius:12px}.article-header{padding:16px;position:relative}.article-title{font-size:20px;font-weight:600;margin-bottom:12px;line-height:1.3}.article-meta{font-size:12px;color:#999;display:flex;gap:12px}.article-content{padding:0 16px 16px}.article-content p{margin-bottom:16px;font-size:15px}.article-content h3{font-size:17px;margin:24px 0 12px;font-weight:600}.article-content ul{margin:0 0 16px 24px}.article-content li{margin-bottom:8px;font-size:15px}.article-actions{display:flex;justify-content:space-between;padding:16px;border-top:1px solid #f0f0f0;margin-top:16px}.action-btn{display:flex;align-items:center;gap:4px;color:#666;background:none;border:none;font-size:14px;cursor:pointer}.action-btn:active{color:#007AFF}.related-section{padding:0 16px 16px}.section-title{font-size:18px;font-weight:600;margin:24px 0 16px;display:flex;align-items:center}.section-title::before{content:'';width:4px;height:20px;background-color:#007AFF;border-radius:2px;margin-right:8px}.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.related-item{background-color:white;border-radius:8px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,0.05);text-decoration:none;color:#333}.related-image{width:100%;height:120px;object-fit:cover;display:block}.related-content{padding:12px}.related-title{font-size:14px;font-weight:500;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}.related-meta{font-size:11px;color:#999;display:flex;gap:8px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:60px;background-color:white;display:flex;justify-content:space-around;align-items:center;box-shadow:0 -2px 10px rgba(0,0,0,0.05);z-index:99}.nav-item{display:flex;flex-direction:column;align-items:center;text-decoration:none;color:#999;font-size:11px}.nav-item.active{color:#007AFF}.nav-icon{font-size:20px;margin-bottom:4px}/* 原有样式保持不变，新增以下内容 */
.user-area{position:relative}.login-modal{position:fixed;top:0;left:0;right:0;bottom:0;z-index:102;display:none;align-items:center;justify-content:center}.login-modal.show{display:flex}.modal-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:rgba(0,0,0,0.5)}.modal-content{position:relative;background-color:white;width:90%;max-width:300px;border-radius:12px;padding:20px;box-shadow:0 4px 20px rgba(0,0,0,0.15)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.modal-header h3{font-size:18px;font-weight:600}.close-btn{background:none;border:none;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;cursor:pointer}.close-btn:active{background-color:#f0f0f0}.login-form .form-group{margin-bottom:16px}.login-form label{display:block;font-size:14px;margin-bottom:6px;color:#666}.login-form input{width:100%;height:40px;border:1px solid #ddd;border-radius:6px;padding:0 12px;font-size:14px;outline:none}.login-form input:focus{border-color:#007AFF}.login-submit{width:100%;height:44px;background-color:#007AFF;color:white;border:none;border-radius:6px;font-size:16px;font-weight:500;cursor:pointer;margin-top:8px}.login-submit:active{background-color:#0066cc}.username-display{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;background-color:#007AFF;color:white;font-size:14px;font-weight:500;cursor:pointer}