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

        body {
            font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
            background: #f6f9fc;
            color: #1e2a3e;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        /* 主色调跟随工具logo深蓝+活力橙 */
        :root {
            --primary-dark: #1E3A5F;
            --primary: #2c5282;
            --accent: #f97316;
            --accent-dark: #ea580c;
            --gray-light: #f1f5f9;
            --gray-border: #e2e8f0;
            --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 头部导航 */
        .navbar {
            background: white;
            border-bottom: 1px solid var(--gray-border);
            position: sticky;
            top: 0;
            z-index: 40;
            backdrop-filter: blur(4px);
            background: rgba(255,255,255,0.92);
        }
        .nav-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .logo i {
            color: var(--accent);
            background: none;
            -webkit-background-clip: unset;
            background-clip: unset;
        }
        .badge-version {
            background: var(--gray-light);
            padding: 4px 10px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* 按钮样式 */
        .btn-primary {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 8px rgba(249,115,22,0.2);
        }
        .btn-primary:hover {
            background-color: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 20px -12px rgba(249,115,22,0.4);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            transition: 0.2s;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: white;
        }

        /* 英雄区 */
        .hero {
            padding: 60px 0 48px;
            background: linear-gradient(135deg, #ffffff 0%, #f1f6fd 100%);
        }
        .hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 40px;
        }
        .hero-content {
            flex: 1;
        }
        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--primary-dark);
            line-height: 1.2;
            margin-bottom: 20px;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: #334155;
            margin-bottom: 32px;
            max-width: 90%;
        }
        .hero-stats {
            display: flex;
            gap: 24px;
            margin-top: 24px;
            color: #475569;
        }

        /* 通用区块样式 */
        section {
            padding: 64px 0;
            border-bottom: 1px solid var(--gray-border);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 32px;
            position: relative;
            display: inline-block;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 60%;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
        }
        .card {
            background: white;
            border-radius: 28px;
            padding: 28px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            transition: all 0.2s;
            height: 100%;
        }
        .grid-2cols, .grid-3cols {
            display: grid;
            gap: 32px;
        }
        .grid-2cols {
            grid-template-columns: repeat(2, 1fr);
        }
        .grid-3cols {
            grid-template-columns: repeat(3, 1fr);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }
        .compare-table th, .compare-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--gray-border);
        }
        .compare-table th {
            background: var(--primary-dark);
            color: white;
            font-weight: 600;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .fa-check-circle {
            color: #10b981;
        }
        .fa-times-circle {
            color: #ef4444;
        }

        /* 下载区域特殊 */
        .download-area {
            background: linear-gradient(120deg, #f0f7ff 0%, #e9f0fa 100%);
            border-radius: 48px;
            margin-top: 24px;
        }
        .download-card {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: center;
            justify-content: space-between;
        }
        .download-info {
            flex: 2;
        }
        .qr-wrapper {
            flex: 1;
            text-align: center;
            background: white;
            padding: 24px 16px;
            border-radius: 32px;
            box-shadow: var(--card-shadow);
        }
        .qr-wrapper img {
            width: 150px;
            height: 150px;
            margin-bottom: 12px;
        }
        .mobile-download-btn {
            display: none;
            margin-top: 20px;
            width: 100%;
        }
        .badge-safe {
            background: #e6f7e6;
            color: #2e6b2f;
            padding: 8px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .comment-card {
            background: white;
            border-radius: 24px;
            padding: 20px;
            box-shadow: 0 5px 12px rgba(0,0,0,0.03);
            border: 1px solid var(--gray-border);
        }

        /* 浮动下载按钮 */
        .floating-download {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent);
            color: white;
            border: none;
            padding: 14px 24px;
            border-radius: 60px;
            font-weight: bold;
            font-size: 1rem;
            cursor: pointer;
            box-shadow: 0 10px 20px rgba(249,115,22,0.4);
            z-index: 99;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: transform 0.2s, opacity 0.2s;
            opacity: 0;
            visibility: hidden;
            transform: scale(0.9);
        }
        .floating-download.show {
            opacity: 1;
            visibility: visible;
            transform: scale(1);
        }
        .floating-download:hover {
            background: var(--accent-dark);
            transform: scale(1.05);
        }

        footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 0 32px;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            justify-content: center;
            margin-bottom: 32px;
        }
        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .copyright {
            text-align: center;
            font-size: 0.85rem;
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            margin-top: 16px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .grid-2cols, .grid-3cols {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                flex-wrap: wrap;
            }
            .download-card {
                flex-direction: column;
            }
            .qr-wrapper {
                width: 100%;
            }
            .mobile-download-btn {
                display: block;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .floating-download {
                bottom: 20px;
                right: 20px;
                padding: 12px 20px;
                font-size: 0.9rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-download-btn {
                display: none;
            }
        }
        .update-time {
            font-size: 0.8rem;
            margin-top: 8px;
            color: #62748c;
        }
        .icon-text {
            display: flex;
            align-items: center;
            gap: 12px;
        }