* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }
        
        body {
            background-color: #f6f6f6;
            color: #1a1a1a;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 导航栏 */
        .navbar {
            background-color: #fff;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 52px;
        }
        
        .logo {
            font-size: 22px;
            font-weight: 600;
            color: #0084ff;
            text-decoration: none;
        }
        
        .search-bar {
            flex-grow: 1;
            max-width: 400px;
            margin: 0 20px;
            position: relative;
        }
        
        .search-bar input {
            width: 100%;
            padding: 8px 12px 8px 35px;
            border: 1px solid #ebebeb;
            border-radius: 20px;
            background-color: #f6f6f6;
            outline: none;
            transition: all 0.3s;
        }
        
        .search-bar input:focus {
            background-color: #fff;
            border-color: #8590a6;
        }
        
        .search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: #8590a6;
        }
        
        .nav-links {
            display: flex;
            align-items: center;
        }
        
        .nav-links a {
            margin-left: 20px;
            color: #8590a6;
            text-decoration: none;
            font-size: 15px;
        }
        
        .nav-links a:hover {
            color: #0084ff;
        }
        
        .ask-btn {
            background-color: #0084ff;
            color: white !important;
            padding: 6px 12px;
            border-radius: 4px;
            margin-left: 15px !important;
        }
        
        /* 主要内容区 */
        .main-content {
            display: flex;
            margin-top: 20px;
        }
        
        .left-sidebar {
            width: 180px;
            margin-right: 20px;
        }
        
        .sidebar-menu {
            background-color: #fff;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }
        
        .menu-item {
            padding: 12px 20px;
            border-bottom: 1px solid #f6f6f6;
            cursor: pointer;
            display: flex;
            align-items: center;
        }
        
        .menu-item:last-child {
            border-bottom: none;
        }
        
        .menu-item:hover {
            background-color: #f6f6f6;
        }
        
        .menu-item.active {
            color: #0084ff;
            font-weight: 500;
        }
        
        .menu-icon {
            margin-right: 10px;
            font-size: 18px;
        }
        
        .content-area {
            flex-grow: 1;
        }
        
        /* 问题详情 */
        .question-detail {
            background-color: #fff;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            padding: 20px;
            margin-bottom: 20px;
        }
        
        .question-header {
            margin-bottom: 20px;
        }
        
        .question-title {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        
        .question-meta {
            display: flex;
            align-items: center;
            color: #8590a6;
            font-size: 14px;
        }
        
        .meta-item {
            margin-right: 15px;
            display: flex;
            align-items: center;
        }
        
        .meta-icon {
            margin-right: 5px;
        }
        
        .question-content {
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        
        .question-content p {
            margin-bottom: 15px;
        }
        
        .question-content img {
            max-width: 100%;
            border-radius: 4px;
            margin: 10px 0;
        }
        
        .question-footer {
            display: flex;
            align-items: center;
            padding-top: 15px;
            border-top: 1px solid #f6f6f6;
        }
        
        .action-btn {
            display: flex;
            align-items: center;
            margin-right: 20px;
            color: #8590a6;
            cursor: pointer;
            font-size: 14px;
        }
        
        .action-btn:hover {
            color: #0084ff;
        }
        
        .action-icon {
            margin-right: 5px;
            font-size: 16px;
        }
        
        /* 回答列表 */
        .answer-list {
            background-color: #fff;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }
        
        .answer-header {
            padding: 15px 20px;
            border-bottom: 1px solid #f6f6f6;
            font-weight: 600;
            font-size: 16px;
        }
        
        .answer-item {
            padding: 20px;
            border-bottom: 1px solid #f6f6f6;
        }
        
        .answer-item:last-child {
            border-bottom: none;
        }
        
        .answer-author {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            margin-right: 10px;
            object-fit: cover;
        }
        
        .author-info {
            flex-grow: 1;
        }
        
        .author-name {
            font-size: 15px;
            font-weight: 500;
            color: #1a1a1a;
            text-decoration: none;
        }
        
        .author-desc {
            font-size: 13px;
            color: #8590a6;
            margin-top: 2px;
        }
        
        .answer-content {
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 15px;
        }
        
        .answer-content p {
            margin-bottom: 15px;
        }
        
        .answer-content img {
            max-width: 100%;
            border-radius: 4px;
            margin: 10px 0;
        }
        
        .answer-footer {
            display: flex;
            align-items: center;
            color: #8590a6;
            font-size: 14px;
        }
        
        .vote-btn {
            display: flex;
            align-items: center;
            margin-right: 20px;
            cursor: pointer;
        }
        
        .vote-count {
            margin: 0 5px;
            min-width: 20px;
            text-align: center;
        }
        
        .vote-up:hover {
            color: #0084ff;
        }
        
        .vote-down:hover {
            color: #f1403c;
        }
        
        .comment-btn, .share-btn {
            margin-right: 15px;
            cursor: pointer;
            display: flex;
            align-items: center;
        }
        
        .comment-btn:hover, .share-btn:hover {
            color: #0084ff;
        }
        
        .footer-icon {
            margin-right: 5px;
        }
        
        .right-sidebar {
            width: 280px;
            margin-left: 20px;
        }
        
        /* 右侧卡片 */
        .sidebar-card {
            background-color: #fff;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            margin-bottom: 20px;
            overflow: hidden;
        }
        
        .card-header {
            padding: 12px 15px;
            border-bottom: 1px solid #f6f6f6;
            font-weight: 600;
            font-size: 15px;
        }
        
        .card-body {
            padding: 15px;
        }
        
        .related-question {
            padding: 10px 0;
            border-bottom: 1px solid #f6f6f6;
        }
        
        .related-question:last-child {
            border-bottom: none;
        }
        
        .related-title {
            font-size: 14px;
            color: #1a1a1a;
            text-decoration: none;
            display: block;
            margin-bottom: 5px;
        }
        
        .related-title:hover {
            color: #175199;
        }
        
        .related-count {
            color: #8590a6;
            font-size: 12px;
        }
        
        .user-card {
            display: flex;
            align-items: center;
            padding: 10px 0;
        }
        
        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            margin-right: 10px;
            object-fit: cover;
        }
        
        .user-info {
            flex-grow: 1;
        }
        
        .user-name {
            font-size: 14px;
            font-weight: 500;
            color: #1a1a1a;
            text-decoration: none;
        }
        
        .user-desc {
            font-size: 12px;
            color: #8590a6;
            margin-top: 2px;
        }
        
        .follow-btn {
            background-color: #0084ff;
            color: white;
            border: none;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            cursor: pointer;
        }
        
        /* 回答编辑器 */
        .answer-editor {
            background-color: #fff;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            padding: 20px;
            margin-top: 20px;
        }
        
        .editor-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 15px;
        }
        
        .editor-toolbar {
            border: 1px solid #ebebeb;
            border-bottom: none;
            padding: 5px;
            display: flex;
            flex-wrap: wrap;
        }
        
        .tool-btn {
            background: none;
            border: none;
            padding: 5px 8px;
            margin-right: 5px;
            cursor: pointer;
            color: #8590a6;
        }
        
        .tool-btn:hover {
            color: #0084ff;
            background-color: #f6f6f6;
            border-radius: 3px;
        }
        
        .editor-content {
            border: 1px solid #ebebeb;
            min-height: 200px;
            padding: 15px;
            outline: none;
        }
        
        .editor-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 15px;
        }
        
        .submit-btn {
            background-color: #0084ff;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            font-size: 14px;
            cursor: pointer;
        }
        
        .submit-btn:hover {
            background-color: #0077e6;
        }