* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-blue: #2a7de1;
            --primary-deep: #1a5bbf;
            --primary-bright: #5b9cf5;
            --primary-glow: rgba(42, 125, 225, 0.25);
            --primary-soft-bg: rgba(42, 125, 225, 0.08);

            --bg-body: #f4f8fe;
            --bg-surface: #ffffff;
            --bg-hero: linear-gradient(135deg, #eaf2fc 0%, #ffffff 100%);
            --bg-footer: #eaf2fc;

            --text-primary: #0b1a30;
            --text-secondary: #2c3e5a;
            --text-muted: #5e6f8a;
            --text-inverse: #ffffff;

            --border-color: #dce5f0;
            --shadow-sm: 0 8px 20px rgba(0, 20, 50, 0.06);
            --shadow-md: 0 12px 30px rgba(0, 20, 50, 0.10);
            --shadow-hover: 0 16px 40px rgba(42, 125, 225, 0.15);

            --font-family: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
            --radius-card: 24px;
            --radius-btn: 60px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

            --scrollbar-track: #dce5f0;
            --scrollbar-thumb: #b0c4de;
        }

        /* 暗色模式 */
        @media (prefers-color-scheme: dark) {
            :root {
                --bg-body: #0f172a;
                --bg-surface: #1e293b;
                --bg-hero: linear-gradient(135deg, #131e3a 0%, #1e293b 100%);
                --bg-footer: #131e3a;
                --text-primary: #f1f5f9;
                --text-secondary: #cbd5e1;
                --text-muted: #94a3b8;
                --border-color: #334155;
                --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.4);
                --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.5);
                --shadow-hover: 0 16px 40px rgba(42, 125, 225, 0.25);
                --primary-soft-bg: rgba(42, 125, 225, 0.15);
                --scrollbar-track: #1e293b;
                --scrollbar-thumb: #475569;
            }
            .download-card,
            .feature-card,
            .friend-link-item,
            .version-card,
            .tutorial-step {
                background: #1e293b !important;
            }
            .friend-link-item:hover {
                background: #2d3b52 !important;
            }
            .header {
                background-color: rgba(15, 23, 42, 0.92) !important;
                border-bottom-color: #334155 !important;
            }
            .nav-menu {
                background-color: #1e293b !important;
            }
            .logo-text {
                background: linear-gradient(135deg, #f1f5f9 0%, var(--primary-bright) 100%);
                background-clip: text;
                -webkit-background-clip: text;
            }
            .download-notes,
            .faq-item {
                background: rgba(42, 125, 225, 0.10);
            }
            .hero-title {
                background: linear-gradient(135deg, #f1f5f9, var(--primary-bright));
                background-clip: text;
                -webkit-background-clip: text;
            }
            /* 新增软件信息暗色适配 */
            .software-info-section {
                background: #1e293b !important;
                border-color: #334155 !important;
            }
            .info-item .label {
                color: #94a3b8 !important;
            }
            .info-item .value {
                color: #e2e8f0 !important;
            }
            .rating-star {
                color: #fbbf24 !important;
            }
        }

        html {
            scroll-behavior: smooth;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            transition: background-color 0.3s, color 0.3s;
            -webkit-font-smoothing: antialiased;
        }

        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--scrollbar-track);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--scrollbar-thumb);
            border-radius: 12px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-blue);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== HEADER ===== */
        .header {
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            transition: background-color 0.3s, border-color 0.3s;
            min-height: 64px;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 64px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-icon {
            color: var(--primary-blue);
            font-size: 26px;
            filter: drop-shadow(0 0 6px var(--primary-glow));
        }

        .logo-text {
            font-size: 22px;
            font-weight: 700;
            background: linear-gradient(135deg, #0b1a30 0%, var(--primary-blue) 100%);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            white-space: nowrap;
        }
        .logo-text span {
            background: linear-gradient(135deg, var(--primary-blue), var(--primary-bright));
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 28px;
            align-items: center;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s;
            padding: 6px 0;
            position: relative;
            letter-spacing: 0.2px;
        }

        .nav-menu a:hover {
            color: var(--primary-blue);
        }
        .nav-menu .active {
            color: var(--primary-blue);
        }
        .nav-menu .active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary-blue);
            border-radius: 4px;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 26px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 10px 8px;
            margin-right: -8px;
            border-radius: 12px;
            transition: background 0.2s;
            min-width: 48px;
            min-height: 48px;
            justify-content: center;
            align-items: center;
        }
        .mobile-menu-btn:active {
            background: var(--primary-soft-bg);
        }

        /* ===== 通用按钮 ===== */
        .download-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background: linear-gradient(105deg, var(--primary-blue), var(--primary-deep));
            color: #fff;
            text-decoration: none;
            padding: 14px 34px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-base);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(42, 125, 225, 0.25);
            min-height: 52px;
            min-width: 48px;
            letter-spacing: 0.3px;
        }
        .download-btn:hover {
            background: linear-gradient(105deg, var(--primary-deep), var(--primary-blue));
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 24px rgba(42, 125, 225, 0.35);
        }
        .download-btn:active {
            transform: scale(0.96);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary-blue);
            border: 2px solid var(--primary-blue);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: var(--primary-blue);
            color: #fff;
        }

        .section-title {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            color: var(--text-primary);
            margin-bottom: 32px;
            text-align: center;
            font-weight: 600;
            position: relative;
        }
        .section-title:after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-blue), transparent);
            margin: 12px auto 0;
            border-radius: 4px;
        }

        /* ===== HERO ===== */
        .hero-section {
            background: var(--bg-hero);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            margin: 20px 0 24px;  /* 减少底部间距，让信息区块衔接更紧密 */
            display: flex;
            align-items: center;
            gap: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: background 0.3s, border-color 0.3s;
        }
        .hero-content {
            flex: 1;
        }
        .hero-title {
            font-size: clamp(2rem, 5vw, 3.2rem);
            background: linear-gradient(135deg, #0b1a30, var(--primary-blue));
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 16px;
            line-height: 1.2;
            letter-spacing: -0.02em;
            font-weight: 700;
        }
        .hero-description {
            font-size: clamp(1rem, 1.2vw, 1.2rem);
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 600px;
        }
        .hero-image {
            flex: 1;
            text-align: center;
        }
        .hero-image img {
            max-width: 100%;
            height: auto;
            max-height: 260px;
            object-fit: contain;
            border-radius: 16px;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.12);
            border: 1px solid var(--border-color);
        }

        /* ===== 新增：软件信息区块 (hero 下方) ===== */
        .software-info-section {
            background: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 24px 32px;
            margin-bottom: 32px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: background 0.3s, border-color 0.3s;
        }
        .info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px 32px;
        }
        .info-item {
            display: flex;
            flex-direction: column;
            padding: 6px 0;
            border-bottom: 1px dashed var(--border-color);
        }
        .info-item:last-child {
            border-bottom: none;
        }
        .info-item .label {
            font-size: 0.78rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--text-muted);
            font-weight: 600;
            margin-bottom: 2px;
        }
        .info-item .value {
            font-size: 1rem;
            color: var(--text-primary);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .info-item .value .tag {
            background: var(--primary-soft-bg);
            color: var(--primary-blue);
            padding: 0 12px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
            line-height: 22px;
            border: 1px solid rgba(42, 125, 225, 0.15);
        }
        .info-item .value .tag.pass {
            background: rgba(34, 197, 94, 0.12);
            color: #16a34a;
            border-color: rgba(34, 197, 94, 0.2);
        }
        .info-item .value .rating-star {
            color: #f59e0b;
            font-size: 1.05rem;
            letter-spacing: 2px;
        }
        .info-item .value .download-count {
            color: var(--primary-blue);
            font-weight: 600;
        }
        .info-item .value i {
            color: var(--primary-blue);
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
        }
        /* 适配小屏 */
        @media (max-width: 768px) {
            .software-info-section {
                padding: 18px 16px;
                border-radius: 20px;
            }
            .info-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px 20px;
            }
            .info-item .label {
                font-size: 0.7rem;
            }
            .info-item .value {
                font-size: 0.9rem;
            }
        }
        @media (max-width: 480px) {
            .info-grid {
                grid-template-columns: 1fr;
                gap: 6px 0;
            }
        }

        /* ===== FEATURES ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-bottom: 40px;
        }
        .feature-card {
            background-color: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            border: 1px solid var(--border-color);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-blue);
        }
        .feature-icon {
            background: var(--primary-soft-bg);
            color: var(--primary-blue);
            width: 56px;
            height: 56px;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 18px;
            border: 1px solid rgba(42, 125, 225, 0.15);
        }
        .feature-title {
            font-size: 1.25rem;
            color: var(--text-primary);
            margin-bottom: 10px;
            font-weight: 600;
        }
        .feature-description {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* ===== DOWNLOAD SECTION ===== */
        .download-section {
            background-color: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: background 0.3s, border-color 0.3s;
        }
        .download-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
            margin-bottom: 32px;
        }
        .download-card {
            background: var(--bg-body);
            border-radius: 20px;
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: all var(--transition-base);
        }
        .download-card:hover {
            border-color: var(--primary-blue);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .download-card .os-icon {
            font-size: 40px;
            color: var(--primary-blue);
            margin-bottom: 12px;
        }
        .download-card h3 {
            font-size: 1.15rem;
            color: var(--text-primary);
            margin-bottom: 6px;
            font-weight: 600;
        }
        .download-card .version {
            color: var(--text-muted);
            margin-bottom: 18px;
            font-size: 0.85rem;
        }
        .download-card .download-btn {
            width: 100%;
            max-width: 220px;
            font-size: 0.95rem;
            padding: 12px 16px;
            min-height: 48px;
        }
        .download-notes {
            background: var(--primary-soft-bg);
            border-left: 4px solid var(--primary-blue);
            padding: 20px 24px;
            border-radius: 0 16px 16px 0;
            transition: background 0.3s;
        }
        .download-notes h4 {
            color: var(--primary-blue);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .download-notes p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            margin-bottom: 4px;
        }

        /* ===== 版本历史列表 ===== */
        .version-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            margin-bottom: 10px;
        }
        .version-card {
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 20px 16px;
            text-align: center;
            transition: all var(--transition-base);
        }
        .version-card:hover {
            border-color: var(--primary-blue);
            transform: translateY(-3px);
        }
        .version-card .ver-num {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-blue);
        }
        .version-card .ver-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .version-card .ver-tag {
            display: inline-block;
            background: var(--primary-soft-bg);
            color: var(--primary-blue);
            border-radius: 20px;
            padding: 2px 14px;
            font-size: 0.75rem;
            margin-top: 8px;
        }

        /* ===== 图文激活教程 ===== */
        .tutorial-section {
            background-color: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .tutorial-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
            max-width: 800px;
            margin: 0 auto;
        }
        .tutorial-step {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: var(--bg-body);
            padding: 20px 24px;
            border-radius: 20px;
            border-left: 4px solid var(--primary-blue);
            border: 1px solid var(--border-color);
            border-left-width: 6px;
            transition: transform 0.2s;
        }
        .tutorial-step:hover {
            transform: translateX(6px);
        }
        .step-number {
            background: var(--primary-blue);
            color: #fff;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
            font-size: 1rem;
        }
        .step-content h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .step-content p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .step-content .warning {
            color: #e67e22;
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background-color: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color 0.2s;
        }
        .faq-item:hover {
            border-color: var(--primary-blue);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            text-align: left;
            transition: background 0.2s;
            font-family: var(--font-family);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--primary-soft-bg);
        }
        .faq-question i {
            color: var(--primary-blue);
            transition: transform 0.3s;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 24px 24px;
        }

        /* ===== 相关工具推荐 ===== */
        .related-tools {
            background-color: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 10px;
        }
        .tool-item {
            display: flex;
            align-items: center;
            gap: 14px;
            background: var(--bg-body);
            padding: 16px 20px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 500;
            transition: all var(--transition-base);
        }
        .tool-item:hover {
            border-color: var(--primary-blue);
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
            color: var(--primary-blue);
        }
        .tool-item i {
            font-size: 24px;
            color: var(--primary-blue);
            width: 30px;
            text-align: center;
        }

        /* ===== FRIEND LINKS ===== */
        .friend-links-section {
            background-color: var(--bg-surface);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .friend-links-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            margin-top: 24px;
        }
        .friend-link-item {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 60px;
            padding: 12px 24px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-primary);
            text-decoration: none;
            transition: all var(--transition-base);
            min-height: 48px;
        }
        .friend-link-item:hover {
            border-color: var(--primary-blue);
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            color: var(--primary-deep);
        }

        /* ===== FOOTER ===== */
        .footer {
            background-color: var(--bg-footer);
            color: var(--text-secondary);
            padding: 40px 0 20px;
            margin-top: 40px;
            border-top: 1px solid var(--border-color);
            transition: background 0.3s, border-color 0.3s;
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-column h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            color: var(--primary-blue);
            font-weight: 600;
        }
        .footer-column ul {
            list-style: none;
        }
        .footer-column ul li {
            margin-bottom: 8px;
        }
        .footer-column ul li a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s;
            font-size: 0.92rem;
        }
        .footer-column ul li a:hover {
            color: var(--primary-blue);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(42, 125, 225, 0.15);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* ========================================
                   RESPONSIVE (移动端优化)
                ======================================== */
        @media (max-width: 992px) {
            .hero-section {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
            }
            .hero-content {
                order: 2;
            }
            .hero-image {
                order: 1;
                margin-bottom: 8px;
            }
            .hero-image img {
                max-height: 200px;
            }
            .hero-description {
                margin-left: auto;
                margin-right: auto;
            }
        }

        @media (max-width: 768px) {
            .nav-container {
                height: 60px;
                padding: 0 12px;
            }
            .logo-text {
                font-size: 19px;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 60px;
                left: 0;
                width: 100%;
                background: var(--bg-surface);
                padding: 20px 24px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                border-bottom: 1px solid var(--border-color);
                gap: 8px;
                z-index: 999;
                transition: background 0.3s;
            }
            .nav-menu.show {
                display: flex;
                animation: slideDown 0.25s ease forwards;
            }
            @keyframes slideDown {
                0% {
                    opacity: 0;
                    transform: translateY(-8px);
                }
                100% {
                    opacity: 1;
                    transform: translateY(0);
                }
            }
            .nav-menu a {
                padding: 12px 16px;
                border-radius: 12px;
                font-size: 1rem;
                width: 100%;
            }
            .nav-menu a:active {
                background: var(--primary-soft-bg);
            }
            .nav-menu .active::after {
                display: none;
            }
            .nav-menu .active {
                background: var(--primary-soft-bg);
                color: var(--primary-blue);
                border-radius: 12px;
            }

            .container {
                padding: 0 12px;
            }
            .hero-section {
                padding: 24px 16px;
                margin: 12px 0 16px;
                border-radius: 20px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .download-section,
            .tutorial-section,
            .faq-section,
            .related-tools,
            .friend-links-section {
                padding: 28px 16px;
                border-radius: 20px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .download-options {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .version-list {
                grid-template-columns: 1fr 1fr;
            }
            .tools-grid {
                grid-template-columns: 1fr;
            }
            .tutorial-step {
                flex-direction: column;
                align-items: flex-start;
                padding: 16px;
            }
            .footer-content {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .download-btn {
                padding: 12px 24px;
                font-size: 0.95rem;
                min-height: 48px;
                width: 100%;
                max-width: 320px;
            }
            .hero-content .download-btn {
                max-width: 100%;
            }
            .download-notes {
                padding: 16px;
            }
        }

        @media (max-width: 420px) {
            .logo-text {
                font-size: 17px;
            }
            .hero-title {
                font-size: 1.5rem;
            }
            .version-list {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 0.9rem;
            }
        }