/* ===== CSS 变量 & 重置 ===== */
        :root {
            --primary-orange: #FF6C37;
            --primary-dark: #E55A2B;
            --primary-light: #FF8A5C;
            --bg-light: #f8f9fc;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888aa;
            --border-color: #e8ecf4;
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 40px rgba(255, 108, 55, 0.15);
            --radius: 16px;
            --transition: 0.3s ease;
            --max-width: 1200px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== HEADER ===== */
        .header {
            background: var(--bg-card);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 2px solid var(--primary-orange);
        }

        .nav-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
        }

        .logo-icon {
            color: var(--primary-orange);
            font-size: 1.7rem;
        }

        .logo-text span {
            color: var(--primary-orange);
        }

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

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition);
            position: relative;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary-orange);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2.5px;
            background: var(--primary-orange);
            border-radius: 4px;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 8px;
        }

        /* ===== HERO ===== */
        .hero-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            padding: 48px 0 32px;
        }

        .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
        }

        .hero-title .highlight {
            color: var(--primary-orange);
        }

        .hero-description {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
            max-width: 540px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }

        .hero-badges span {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 40px;
            padding: 4px 16px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            box-shadow: var(--shadow-sm);
        }

        .hero-badges i {
            color: var(--primary-orange);
            margin-right: 6px;
        }

        /* ----- 下载按钮 (button 样式) ----- */
        .download-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary-orange);
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 14px 36px;
            border-radius: 60px;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 8px 24px rgba(255, 108, 55, 0.3);
            font-family: inherit;
            line-height: 1.4;
        }

        .download-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(255, 108, 55, 0.4);
        }

        .download-btn:active {
            transform: translateY(0);
        }

        .download-btn:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none !important;
        }

        .download-btn i {
            font-size: 1.1rem;
        }

        .download-btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-orange);
            color: #fff;
            font-weight: 600;
            padding: 10px 28px;
            border-radius: 60px;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            font-family: inherit;
            line-height: 1.4;
        }

        .download-btn-sm:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        .download-btn-sm:active {
            transform: translateY(0);
        }

        .download-btn-sm:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none !important;
        }

        .hero-image {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-image img {
            max-width: 100%;
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
            background: #fff;
            width: 100%;
            height: auto;
            object-fit: contain;
            aspect-ratio: 16/10;
        }

        /* ===== 软件信息区块 ===== */
        .software-info-section {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 32px;
            margin: 12px 0 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 16px 24px;
        }

        .info-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .info-item .label {
            font-size: 0.78rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .info-item .value {
            font-weight: 600;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .info-item .value i {
            color: var(--primary-orange);
            width: 18px;
            text-align: center;
        }

        .tag {
            background: var(--primary-orange);
            color: #fff;
            font-size: 0.65rem;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 40px;
            letter-spacing: 0.3px;
        }

        .tag.pass {
            background: #e8f5e9;
            color: #2e7d32;
        }

        .rating-star {
            color: #f9a825;
            letter-spacing: 2px;
        }

        .download-count {
            color: var(--primary-orange);
            font-weight: 700;
        }

        /* ===== 通用标题 ===== */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
        }

        .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 32px;
            font-size: 1.05rem;
        }

        /* ===== FEATURES ===== */
        .features-section {
            padding: 40px 0;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .feature-icon {
            font-size: 2rem;
            color: var(--primary-orange);
            margin-bottom: 14px;
        }

        .feature-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .feature-description {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* ===== DOWNLOAD ===== */
        .download-section {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 32px;
            margin: 32px 0;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .download-options {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
            margin-top: 12px;
        }

        .download-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .download-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .download-card .os-icon {
            font-size: 2.8rem;
            color: var(--primary-orange);
            margin-bottom: 8px;
        }

        .download-card h3 {
            font-size: 1.15rem;
            margin-bottom: 4px;
        }

        .download-card .version {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        .download-notes {
            margin-top: 28px;
            padding: 20px 24px;
            background: #fff8f5;
            border-radius: var(--radius);
            border-left: 4px solid var(--primary-orange);
        }

        .download-notes h4 {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--primary-orange);
            margin-bottom: 10px;
        }

        .download-notes p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }

        .download-notes a {
            color: var(--primary-orange);
            font-weight: 600;
        }

        /* ===== 版本列表 ===== */
        .version-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
            gap: 16px;
            margin: 20px 0;
        }

        .version-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px 16px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: transform var(--transition);
        }

        .version-card:hover {
            transform: translateY(-3px);
        }

        .version-card .ver-num {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-orange);
        }

        .version-card .ver-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 4px 0 8px;
        }

        .version-card .ver-tag {
            font-size: 0.7rem;
            background: var(--primary-orange);
            color: #fff;
            padding: 2px 12px;
            border-radius: 40px;
            font-weight: 600;
        }

        /* ===== 教程步骤 ===== */
        .tutorial-section {
            padding: 32px 0;
        }

        .tutorial-steps {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }

        .tutorial-step {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px 24px;
            border: 1px solid var(--border-color);
            align-items: flex-start;
        }

        .step-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            background: var(--primary-orange);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .step-content h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }

        .step-content p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        .step-content .warning {
            background: #fff3e0;
            color: #e65100;
            padding: 2px 10px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 0.85rem;
        }

        .step-content code {
            background: #f1f3f5;
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.85rem;
            color: var(--primary-orange);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 32px 0 40px;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: border-color var(--transition);
        }

        .faq-item.active {
            border-color: var(--primary-orange);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            background: none;
            border: none;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            text-align: left;
            transition: background var(--transition);
            font-family: inherit;
        }

        .faq-question:hover {
            background: #fafafa;
        }

        .faq-question i.fa-chevron-down {
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .faq-item.active .faq-question i.fa-chevron-down {
            transform: rotate(180deg);
            color: var(--primary-orange);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            margin-bottom: 6px;
        }

        /* ===== 相关工具 ===== */
        .related-tools {
            padding: 32px 0;
        }

        .tools-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .tool-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 60px;
            padding: 10px 24px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: var(--shadow-sm);
        }

        .tool-item:hover {
            border-color: var(--primary-orange);
            color: var(--primary-orange);
            transform: translateY(-2px);
        }

        .tool-item i {
            color: var(--primary-orange);
        }

        /* ===== 友情链接 ===== */
        .friend-links-section {
            padding: 20px 0 40px;
        }

        .friend-links-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px 32px;
        }

        .friend-link-item {
            color: var(--text-secondary);
            font-weight: 500;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .friend-link-item:hover {
            color: var(--primary-orange);
        }

        /* ===== FOOTER ===== */
        .footer {
            background: var(--text-dark);
            color: #ccc;
            padding: 40px 24px 20px;
            margin-top: 40px;
        }

        .footer-content {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 32px;
        }

        .footer-column h3 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 12px;
        }

        .footer-column ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-column ul a {
            color: #aaa;
            font-size: 0.9rem;
            transition: color var(--transition);
        }

        .footer-column ul a:hover {
            color: var(--primary-orange);
        }

        .footer-column p {
            font-size: 0.9rem;
            color: #aaa;
        }

        .copyright {
            max-width: var(--max-width);
            margin: 28px auto 0;
            padding-top: 20px;
            border-top: 1px solid #333;
            text-align: center;
            font-size: 0.85rem;
            color: #888;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .hero-section {
                grid-template-columns: 1fr;
                text-align: center;
                padding: 24px 0;
            }

            .hero-description {
                margin-left: auto;
                margin-right: auto;
            }

            .hero-badges {
                justify-content: center;
            }

            .hero-image img {
                max-width: 80%;
                margin: 0 auto;
            }
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }

            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-card);
                padding: 20px 24px;
                gap: 16px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
                border-bottom: 2px solid var(--border-color);
            }

            .nav-menu.show {
                display: flex !important;
            }

            .nav-menu a {
                font-size: 1rem;
            }

            .hero-title {
                font-size: 2rem;
            }

            .section-title {
                font-size: 1.6rem;
            }

            .download-options {
                grid-template-columns: 1fr;
            }

            .info-grid {
                grid-template-columns: 1fr 1fr;
            }

            .footer-content {
                grid-template-columns: 1fr 1fr;
            }

            .tutorial-step {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }

            .step-number {
                align-self: center;
            }
        }

        @media (max-width: 480px) {
            .info-grid {
                grid-template-columns: 1fr;
            }

            .hero-title {
                font-size: 1.6rem;
            }

            .download-section {
                padding: 24px 16px;
            }

            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .download-btn {
                width: 100%;
                justify-content: center;
            }

            .download-btn-sm {
                width: 100%;
                justify-content: center;
            }
        }