* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
        }

        body {
            background: #f8fafc;
            color: #334155;
            min-height: 100vh;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .navbar {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            padding: 20px 80px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            z-index: 1000;
            border-bottom: 1px solid rgba(203, 213, 225, 0.5);
            box-shadow: 0 2px 20px rgba(30, 58, 138, 0.05);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 28px;
            font-weight: 700;
            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 20px;
        }

        .nav-links {
            display: flex;
            gap: 40px;
            align-items: center;
        }

        .nav-links a {
            color: #475569;
            text-decoration: none;
            font-size: 16px;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: #3b82f6;
        }

        .nav-links a.active {
            color: #1d4ed8;
            font-weight: 600;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, #3b82f6, #1d4ed8);
            border-radius: 2px;
        }

        .nav-buttons {
            display: flex;
            gap: 20px;
        }

        .btn {
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
        }

        .btn-login {
            background: transparent;
            color: #475569;
            border: 1px solid #cbd5e1;
        }

        .btn-login:hover {
            background: rgba(59, 130, 246, 0.1);
            border-color: #3b82f6;
            color: #3b82f6;
        }

        .btn-download {
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            color: white;
        }

        .btn-download:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
        }

        /* 英雄区域 - 优化渐变背景 */
        .hero {
            padding: 180px 80px 120px;
            text-align: center;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, 
                #f0f9ff 0%, 
                #e0f2fe 30%, 
                #dbeafe 60%, 
                #eff6ff 100%
            );
            position: relative;
        }

        /* 中心向外辐射渐变效果 */
        .hero::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 120vw;
            height: 120vh;
            background: radial-gradient(
                circle at center,
                rgba(59, 130, 246, 0.15) 0%,
                rgba(37, 99, 235, 0.08) 30%,
                rgba(96, 165, 250, 0.03) 60%,
                transparent 80%
            );
            z-index: 0;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
        }

        .hero h1 {
            font-size: 64px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 22px;
            color: #475569;
            max-width: 800px;
            margin: 0 auto 40px;
            line-height: 1.6;
        }

        .tag-line {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(59, 130, 246, 0.15);
            padding: 12px 24px;
            border-radius: 50px;
            border: 1px solid rgba(59, 130, 246, 0.3);
            margin-bottom: 40px;
            color: #1d4ed8;
            font-weight: 500;
            backdrop-filter: blur(10px);
        }

        .tag-line i {
            color: #3b82f6;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            margin-bottom: 60px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            color: white;
            padding: 16px 40px;
            font-size: 18px;
            border-radius: 12px;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, 
                transparent, 
                rgba(255, 255, 255, 0.2), 
                transparent
            );
            transition: left 0.5s ease;
            z-index: -1;
        }

        .btn-primary:hover::before {
            left: 100%;
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.9);
            color: #3b82f6;
            border: 1px solid rgba(59, 130, 246, 0.3);
            padding: 16px 40px;
            font-size: 18px;
            border-radius: 12px;
            backdrop-filter: blur(10px);
        }

        .btn-primary:hover, .btn-secondary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(59, 130, 246, 0.2);
        }

        /* 支持平台 */
        .platforms {
            padding: 60px 80px;
            text-align: center;
            background: #f8fafc;
            position: relative;
        }

        .platforms::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, 
                transparent, 
                rgba(59, 130, 246, 0.2), 
                transparent
            );
        }

        .platforms-title {
            font-size: 18px;
            color: #64748b;
            margin-bottom: 30px;
        }

        .platforms-grid {
            display: flex;
            justify-content: center;
            gap: 40px;
        }

        .platform-card {
            background: white;
            border-radius: 16px;
            padding: 30px;
            min-width: 200px;
            border: 1px solid rgba(203, 213, 225, 0.5);
            transition: all 0.3s ease;
            box-shadow: 0 4px 20px rgba(30, 58, 138, 0.05);
        }

        .platform-card.active {
            border-color: #3b82f6;
            background: linear-gradient(135deg, 
                rgba(59, 130, 246, 0.05), 
                rgba(29, 78, 216, 0.08)
            );
            transform: translateY(-5px);
        }

        .platform-card.upcoming {
            border-color: rgba(203, 213, 225, 0.5);
            opacity: 0.8;
        }

        .platform-icon {
            font-size: 48px;
            margin-bottom: 15px;
        }

        .platform-card.active .platform-icon {
            color: #3b82f6;
        }

        .platform-card.upcoming .platform-icon {
            color: #94a3b8;
        }

        .platform-card h3 {
            font-size: 24px;
            margin-bottom: 10px;
            color: #1e293b;
        }

        .platform-card.active h3 {
            color: #1d4ed8;
        }

        .platform-status {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
        }

        .status-active {
            background: rgba(34, 197, 94, 0.1);
            color: #16a34a;
            border: 1px solid rgba(34, 197, 94, 0.2);
        }

        .status-upcoming {
            background: rgba(148, 163, 184, 0.1);
            color: #64748b;
            border: 1px solid rgba(148, 163, 184, 0.2);
        }

        /* 特性展示 */
        .features {
            padding: 100px 80px;
            background: white;
            position: relative;
        }

        .features::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, 
                transparent, 
                rgba(59, 130, 246, 0.2), 
                transparent
            );
        }

        .section-title {
            text-align: center;
            font-size: 42px;
            font-weight: 700;
            margin-bottom: 60px;
            color: #1e293b;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .feature-card {
            background: white;
            border: 1px solid rgba(203, 213, 225, 0.5);
            border-radius: 16px;
            padding: 40px 30px;
            text-align: center;
            transition: all 0.3s ease;
            box-shadow: 0 4px 20px rgba(30, 58, 138, 0.05);
        }

        .feature-card:hover {
            transform: translateY(-10px);
            border-color: #3b82f6;
            box-shadow: 0 20px 40px rgba(59, 130, 246, 0.1);
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(29, 78, 216, 0.15));
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            color: #3b82f6;
            font-size: 36px;
        }

        .feature-card h3 {
            font-size: 24px;
            margin-bottom: 15px;
            color: #1e293b;
        }

        .feature-card p {
            color: #64748b;
            line-height: 1.6;
            font-size: 16px;
        }

        /* 下载区域 */
        .download {
            padding: 120px 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
        }

        .download::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 100vw;
            height: 100vh;
            background: radial-gradient(
                circle at center,
                rgba(59, 130, 246, 0.1) 0%,
                rgba(37, 99, 235, 0.05) 30%,
                rgba(96, 165, 250, 0.02) 60%,
                transparent 80%
            );
            z-index: 0;
            pointer-events: none;
        }

        .download-content {
            position: relative;
            z-index: 1;
        }

        .download h2 {
            font-size: 48px;
            margin-bottom: 20px;
            color: #1e293b;
        }

        .download p {
            font-size: 20px;
            color: #64748b;
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .download-card {
            background: white;
            border-radius: 20px;
            padding: 50px;
            max-width: 600px;
            margin: 0 auto 40px;
            border: 1px solid rgba(203, 213, 225, 0.5);
            box-shadow: 0 10px 40px rgba(30, 58, 138, 0.08);
        }

        .windows-icon {
            font-size: 80px;
            color: #3b82f6;
            margin-bottom: 20px;
        }

        .version-badge {
            display: inline-block;
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            color: white;
            padding: 8px 20px;
            border-radius: 20px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .download-info {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin: 30px 0;
            color: #64748b;
        }

        .info-item {
            text-align: center;
        }

        .info-item i {
            font-size: 24px;
            color: #3b82f6;
            margin-bottom: 10px;
        }

        /* 路线图 */
        .roadmap {
            padding: 100px 80px;
            background: white;
            position: relative;
        }

        .roadmap::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, 
                transparent, 
                rgba(59, 130, 246, 0.2), 
                transparent
            );
        }

        .roadmap-timeline {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
        }

        .roadmap-timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, #3b82f6, #1d4ed8);
            transform: translateX(-50%);
        }

        .roadmap-item {
            position: relative;
            margin-bottom: 60px;
            width: 50%;
            padding: 30px;
            background: white;
            border-radius: 16px;
            border: 1px solid rgba(203, 213, 225, 0.5);
            box-shadow: 0 4px 20px rgba(30, 58, 138, 0.05);
        }

        .roadmap-item:nth-child(odd) {
            left: 0;
            text-align: right;
            padding-right: 60px;
        }

        .roadmap-item:nth-child(even) {
            left: 50%;
            text-align: left;
            padding-left: 60px;
        }

        .roadmap-item::before {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            background: white;
            border: 3px solid #3b82f6;
            border-radius: 50%;
            top: 40px;
            z-index: 1;
        }

        .roadmap-item:nth-child(odd)::before {
            right: -10px;
        }

        .roadmap-item:nth-child(even)::before {
            left: -10px;
        }

        .roadmap-item.current::before {
            background: #3b82f6;
            box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.3);
        }

        .roadmap-item h3 {
            font-size: 24px;
            margin-bottom: 10px;
            color: #1e293b;
        }

        .roadmap-item p {
            color: #64748b;
            line-height: 1.6;
        }

        .roadmap-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .badge-current {
            background: rgba(59, 130, 246, 0.1);
            color: #1d4ed8;
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

        .badge-upcoming {
            background: rgba(148, 163, 184, 0.1);
            color: #64748b;
            border: 1px solid rgba(148, 163, 184, 0.2);
        }

        /* 页脚 */
        .footer {
            padding: 60px 80px 30px;
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            color: #cbd5e1;
            position: relative;
        }

        .footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, 
                transparent, 
                rgba(59, 130, 246, 0.3), 
                transparent
            );
        }

        .footer-content {
            display: flex;
            justify-content: space-between;
            margin-bottom: 40px;
        }

        .footer-section {
            flex: 1;
        }

        .footer-section h4 {
            font-size: 18px;
            margin-bottom: 20px;
            color: #f1f5f9;
        }

        .footer-links {
            list-style: none;
           
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: #60a5fa;
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(148, 163, 184, 0.2);
            color: #94a3b8;
            font-size: 14px;
        }

        .domain {
            color: #60a5fa;
            font-weight: 600;
        }

        .footer .logo {
            font-size: 24px;
            margin-bottom: 20px;
        }

        .footer .logo-icon {
            width: 36px;
            height: 36px;
            font-size: 18px;
        }



         .activity-banner {
      background-color: #fff7f7;
      border: 1px solid #ffe0e0;
      border-radius: 8px;
      padding: 12px 16px;
      margin:95px auto 12px auto; /* 居中 + 上下间距 */
      font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      display: flex;
      align-items: center;
      gap: 10px;
      box-shadow: 0 2px 6px rgba(255, 0, 0, 0.05);
      max-width: 90vw; /* 防止超出屏幕 */
      box-sizing: border-box;
      justify-content: center;
    }

    .activity-icon {
      color: #ff6b6b;
      font-size: 18px;
      min-width: 18px;
      text-align: center;
    }

    .activity-text {
      color: #d32f2f;
      font-weight: 600;
      font-size: 15px;
      line-height: 1.4;
      margin: 0;
      word-break: keep-all;
      white-space: nowrap; /* 保持一行（可根据需要改为 normal）*/
      overflow: hidden;
      text-overflow: ellipsis;
    }

    /* 小屏优化 */
    @media (max-width: 375px) {
      .activity-banner {
        padding: 10px 12px;
      }
      .activity-text {
        font-size: 14px;
      }
    }



        /* 响应式调整 */
        @media (max-width: 1400px) {
            .navbar, .hero, .platforms, .features, .download, .roadmap, .footer {
                padding-left: 60px;
                padding-right: 60px;
            }
        }

        @media (max-width: 1200px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .navbar {
                padding: 20px 30px;
            }
            
            .nav-links {
                display: none;
            }
            
            .hero h1 {
                font-size: 48px;
            }
            
            .features-grid, .platforms-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            .platforms-grid {
                flex-direction: column;
                align-items: center;
            }
            
            .roadmap-timeline::before {
                left: 30px;
            }
            
            .roadmap-item {
                width: 100%;
                left: 0 !important;
                text-align: left !important;
                padding-left: 60px !important;
                padding-right: 30px !important;
            }
            
            .roadmap-item::before {
                left: 20px !important;
                right: auto !important;
            }
            
            .download-info {
                flex-direction: column;
                gap: 20px;
            }
        }

        /* 动画 */
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        .floating {
            animation: float 3s ease-in-out infinite;
        }



        .tutorial-container {
            
            display: flex;
            gap: 30px;
            max-width: 1400px;
            margin: 0 auto;
            padding: 40px 20px;
            margin-top:70px;
            min-height: calc(100vh - 200px);
        }

        .tutorial-sidebar {
            flex: 0 0 340px;
            background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
            border-radius: 16px;
            box-shadow: 0 8px 32px rgba(30, 58, 138, 0.12);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            max-height: 700px;
            border: 1px solid rgba(59, 130, 246, 0.1);
        }

        .tutorial-sidebar-header {
            padding: 24px 24px;
            background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
            color: white;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
        }

        .tutorial-sidebar-header i {
            margin-right: 8px;
            font-size: 20px;
        }

        .tutorial-list {
            flex: 1;
            overflow-y: auto;
            padding: 8px 0;
            scrollbar-width: thin;
            scrollbar-color: rgba(59, 130, 246, 0.3) transparent;
        }

        .tutorial-list::-webkit-scrollbar {
            width: 6px;
        }

        .tutorial-list::-webkit-scrollbar-track {
            background: transparent;
        }

        .tutorial-list::-webkit-scrollbar-thumb {
            background: rgba(59, 130, 246, 0.3);
            border-radius: 3px;
        }

        .tutorial-list::-webkit-scrollbar-thumb:hover {
            background: rgba(59, 130, 246, 0.5);
        }

        .tutorial-item {
            padding: 14px 20px;
            margin: 4px 8px;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            display: flex;
            align-items: center;
            gap: 12px;
            color: #475569;
            text-decoration: none;
            position: relative;
            overflow: hidden;
        }

        .tutorial-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, #3b82f6 0%, #2563eb 100%);
            transform: scaleY(0);
            transform-origin: center;
            transition: transform 0.3s ease;
        }

        .tutorial-item:hover {
            background: rgba(59, 130, 246, 0.08);
            transform: translateX(4px);
        }

        .tutorial-item:hover::before {
            transform: scaleY(1);
        }

        .tutorial-item.active {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(37, 99, 235, 0.1) 100%);
            color: #3b82f6;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
        }

        .tutorial-item.active::before {
            transform: scaleY(1);
        }

        .tutorial-item-icon {
            font-size: 16px;
            flex-shrink: 0;
            transition: all 0.3s ease;
            color: #3b82f6;
        }

        .tutorial-item:hover .tutorial-item-icon {
            transform: scale(1.2) rotate(5deg);
        }

        .tutorial-item.active .tutorial-item-icon {
            animation: bounce 0.6s ease;
        }

        @keyframes bounce {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.3); }
        }

        .tutorial-item-title {
            flex: 1;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-size: 14px;
            font-weight: 500;
        }

        .tutorial-content {
            flex: 1;
            background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
            border-radius: 16px;
            box-shadow: 0 8px 32px rgba(30, 58, 138, 0.12);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(59, 130, 246, 0.1);
        }

        .tutorial-content-empty {
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
            color: #94a3b8;
            font-size: 16px;
        }

        .tutorial-content-header {
            padding: 32px 36px;
            border-bottom: 1px solid rgba(59, 130, 246, 0.1);
            background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
        }

        .tutorial-content-title {
            font-size: 32px;
            font-weight: 800;
            color: #1e293b;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .tutorial-content-meta {
            display: flex;
            gap: 24px;
            font-size: 14px;
            color: #64748b;
            flex-wrap: wrap;
        }

        .tutorial-content-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 12px;
            background: rgba(59, 130, 246, 0.05);
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .tutorial-content-meta-item:hover {
            background: rgba(59, 130, 246, 0.1);
            color: #3b82f6;
        }

        .tutorial-content-meta-item i {
            color: #3b82f6;
            font-size: 16px;
        }

        .tutorial-content-body {
            flex: 1;
            overflow-y: auto;
            padding: 36px;
            scrollbar-width: thin;
            scrollbar-color: rgba(59, 130, 246, 0.2) transparent;
        }

        .tutorial-content-body::-webkit-scrollbar {
            width: 8px;
        }

        .tutorial-content-body::-webkit-scrollbar-track {
            background: transparent;
        }

        .tutorial-content-body::-webkit-scrollbar-thumb {
            background: rgba(59, 130, 246, 0.2);
            border-radius: 4px;
        }

        .tutorial-content-body::-webkit-scrollbar-thumb:hover {
            background: rgba(59, 130, 246, 0.4);
        }

        .tutorial-content-image {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            margin-bottom: 24px;
            box-shadow: 0 8px 24px rgba(30, 58, 138, 0.15);
            transition: all 0.3s ease;
            border: 1px solid rgba(59, 130, 246, 0.1);
        }

        .tutorial-content-image:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(30, 58, 138, 0.2);
        }

        .tutorial-content-text {
            color: #475569;
            line-height: 1.9;
            font-size: 15px;
        }

        .tutorial-content-text h2 {
            font-size: 22px;
            font-weight: 700;
            color: #1e293b;
            margin: 28px 0 16px 0;
            padding-bottom: 12px;
            border-bottom: 2px solid rgba(59, 130, 246, 0.2);
        }

        .tutorial-content-text h3 {
            font-size: 18px;
            font-weight: 600;
            color: #334155;
            margin: 20px 0 12px 0;
        }

        .tutorial-content-text p {
            margin-bottom: 16px;
        }

        .tutorial-content-text ul,
        .tutorial-content-text ol {
            margin-left: 24px;
            margin-bottom: 16px;
        }

        .tutorial-content-text li {
            margin-bottom: 10px;
            padding-left: 8px;
        }

        .tutorial-content-text ul li::marker {
            color: #3b82f6;
            font-weight: 600;
        }
        .tutorial-content-text img{ width:90%; margin:10px auto;}
        .tutorial-type-badge {
            display: inline-block;
            padding: 6px 16px;
            background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
            color: #1e40af;
            border-radius: 24px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.15);
        }

        @media (max-width: 1024px) {
            .tutorial-container {
                flex-direction: column;
                gap: 24px;
            }

            .tutorial-sidebar {
                flex: 0 0 auto;
                max-height: 350px;
            }

            .tutorial-content {
                flex: 1;
            }
        }

        @media (max-width: 768px) {
            .tutorial-container {
                padding: 20px 12px;
                gap: 16px;
            }

            .tutorial-sidebar {
                flex: 0 0 auto;
                max-height: 280px;
                border-radius: 12px;
            }

            .tutorial-sidebar-header {
                padding: 16px 20px;
                font-size: 16px;
            }

            .tutorial-item {
                padding: 12px 16px;
                margin: 3px 6px;
                border-radius: 8px;
                font-size: 13px;
            }

            .tutorial-content-header {
                padding: 20px 24px;
            }

            .tutorial-content-title {
                font-size: 24px;
                margin-bottom: 12px;
            }

            .tutorial-content-meta {
                gap: 12px;
                font-size: 13px;
            }

            .tutorial-content-body {
                padding: 20px 24px;
            }

            .tutorial-content-text {
                font-size: 14px;
                line-height: 1.8;
            }

            .tutorial-content-text h2 {
                font-size: 18px;
                margin: 20px 0 12px 0;
            }

            .tutorial-content-text h3 {
                font-size: 16px;
                margin: 16px 0 10px 0;
            }
        }