/* 基础样式重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #1a1a1a;
            --text-color: #333;
            --text-light: #777;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --success-color: #2ecc71;
            --warning-color: #f39c12;
            --info-color: #3498db;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
            text-rendering: optimizeLegibility;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: var(--secondary-color);
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
            font-size: 1rem;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .btn:hover {
            background-color: #2980b9;
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .section {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 70px;
            height: 3px;
            background-color: var(--secondary-color);
        }

        .section-title p {
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }

        /* 导航栏样式 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: var(--shadow);
            z-index: 1000;
            transition: transform 0.3s ease, background-color 0.3s ease, padding 0.3s ease;
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
        }

        .header-scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            padding: 10px 0;
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }

        .logo span {
            color: var(--secondary-color);
        }

        .nav-links {
            display: flex;
        }

        .nav-links li {
            margin-left: 30px;
        }

        .nav-links a {
            font-weight: 600;
            position: relative;
            padding: 8px 0;
            display: block;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .mobile-menu {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            -webkit-tap-highlight-color: transparent;
        }

        /* 更新日志样式 */
        .updates-hero {
            height: 40vh;
            background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80') no-repeat center center/cover;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
            margin-top: 70px;
        }

        .updates-hero h1 {
            font-size: 3rem;
            margin-bottom: 20px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }

        .updates-hero p {
            font-size: 1.2rem;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
        }

        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }

        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background-color: var(--light-color);
            transform: translateX(-50%);
        }

        .update-card {
            position: relative;
            margin-bottom: 60px;
            width: 100%;
        }

        .update-card:nth-child(odd) {
            padding-right: calc(50% + 30px);
            text-align: right;
        }

        .update-card:nth-child(even) {
            padding-left: calc(50% + 30px);
        }

        .update-content {
            background: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            position: relative;
            transition: var(--transition);
        }

        .update-content:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .update-card:nth-child(odd) .update-content::after {
            content: '';
            position: absolute;
            top: 20px;
            right: -10px;
            width: 0;
            height: 0;
            border-top: 10px solid transparent;
            border-bottom: 10px solid transparent;
            border-left: 10px solid white;
        }

        .update-card:nth-child(even) .update-content::after {
            content: '';
            position: absolute;
            top: 20px;
            left: -10px;
            width: 0;
            height: 0;
            border-top: 10px solid transparent;
            border-bottom: 10px solid transparent;
            border-right: 10px solid white;
        }

        .version-badge {
            position: absolute;
            top: 20px;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 1.2rem;
            box-shadow: var(--shadow);
            z-index: 10;
        }

        .update-card:nth-child(odd) .version-badge {
            right: -30px;
        }

        .update-card:nth-child(even) .version-badge {
            left: -30px;
        }

        .version-major {
            background-color: var(--accent-color);
        }

        .version-minor {
            background-color: var(--secondary-color);
        }

        .version-patch {
            background-color: var(--success-color);
        }

        .update-header {
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--light-color);
        }

        .version-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 5px;
        }

        .update-date {
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .update-features {
            margin-bottom: 20px;
        }

        .update-section {
            margin-bottom: 15px;
        }

        .update-section h4 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }

        .update-section h4::before {
            content: '';
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin-right: 8px;
        }

        .feature-new h4::before {
            background-color: var(--success-color);
        }

        .feature-improved h4::before {
            background-color: var(--info-color);
        }

        .feature-fixed h4::before {
            background-color: var(--warning-color);
        }

        .update-section ul {
            padding-left: 20px;
        }

        .update-section li {
            margin-bottom: 8px;
            position: relative;
            padding-left: 15px;
        }

        .update-section li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--secondary-color);
        }

        .update-actions {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .btn-small {
            padding: 8px 16px;
            font-size: 0.9rem;
            min-height: 36px;
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--secondary-color);
            color: var(--secondary-color);
        }

        .btn-outline:hover {
            background-color: var(--secondary-color);
            color: white;
        }


        .social-links {
            display: flex;
            gap: 15px;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            transition: var(--transition);
        }

        .social-links a:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }

        .footer-links h3, .footer-newsletter h3 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-links h3::after, .footer-newsletter h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--secondary-color);
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }

        .footer-newsletter p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }


        /* 响应式设计 */
        @media (max-width: 992px) {
            .footer-content {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .navbar {
                padding: 15px 0;
            }
            
            .nav-links {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: white;
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 50px;
                transition: var(--transition);
                box-shadow: var(--shadow);
                overflow-y: auto;
                -webkit-overflow-scrolling: touch;
            }
            
            .nav-links.active {
                left: 0;
            }
            
            .nav-links li {
                margin: 0 0 30px 0;
                width: 100%;
                text-align: center;
            }
            
            .nav-links a {
                padding: 12px 0;
                font-size: 1.1rem;
                width: 100%;
            }
            
            .mobile-menu {
                display: block;
            }
            
            .updates-hero {
                height: 30vh;
                min-height: 250px;
            }
            
            .updates-hero h1 {
                font-size: 2.2rem;
            }
            
            .updates-hero p {
                font-size: 1.1rem;
            }
            
            .section {
                padding: 60px 0;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .timeline::before {
                left: 30px;
            }
            
            .update-card:nth-child(odd),
            .update-card:nth-child(even) {
                padding: 0 0 0 70px;
                text-align: left;
            }
            
            .update-card:nth-child(odd) .version-badge,
            .update-card:nth-child(even) .version-badge {
                left: 0;
                right: auto;
            }
            
            .update-card:nth-child(odd) .update-content::after,
            .update-card:nth-child(even) .update-content::after {
                left: -10px;
                right: auto;
                border-right: 10px solid white;
                border-left: none;
            }
        }

        @media (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .updates-hero h1 {
                font-size: 1.8rem;
            }
            
            .section-title h2 {
                font-size: 1.6rem;
            }
            
            .update-content {
                padding: 20px;
            }
            
            .version-number {
                font-size: 1.5rem;
            }
            
            .update-actions {
                flex-direction: column;
            }
        }