:root {
            --bg-base: #06010d;
            --text-white: #ffffff;
            --text-gray: #b0aac2;
            --accent-purple: #a855f7;
            --accent-blue: #3b82f6;
            --gradient-main: linear-gradient(90deg, var(--accent-purple) 0%, var(--accent-blue) 100%);
            --card-blend-bg: rgba(26, 12, 46, 0.3);
            --card-blend-border: rgba(168, 85, 247, 0.12);
        }

        html {
            scroll-behavior: smooth;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            position: relative;
        }

        .neon-bg-glow {
            position: absolute;
            pointer-events: none;
            z-index: 1;
            filter: blur(50px);
        }
        .glow-1 {
            width: 900px;
            height: 900px;
            top: -150px;
            right: -100px;
            background: radial-gradient(circle, rgba(147, 51, 234, 0.45) 0%, rgba(59, 130, 246, 0.1) 45%, rgba(6, 1, 13, 0) 70%);
        }
        .glow-2 {
            width: 900px;
            height: 900px;
            top: 700px;
            left: -250px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.35) 0%, rgba(147, 51, 234, 0.2) 50%, rgba(6, 1, 13, 0) 70%);
        }
        .glow-3 {
            width: 900px;
            height: 900px;
            top: 1500px;
            right: -250px;
            background: radial-gradient(circle, rgba(168, 85, 247, 0.4) 0%, rgba(6, 1, 13, 0) 70%);
        }

        section,
        header,
        footer {
            position: relative;
            z-index: 2;
            scroll-margin-top: 100px;
        }

        /* 导航栏 */
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 8%;
            background: rgba(6, 1, 13, 0.75);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 9999;
            border-bottom: 1px solid rgba(168, 85, 247, 0.08);
        }
        .logo-img {
            height: 32px;
            display: block;
            cursor: pointer;
        }
        nav {
            display: flex;
            gap: 35px;
        }
        nav span,
        nav a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            cursor: pointer;
            transition: color 0.2s;
            user-select: none;
            text-decoration: none;
        }
        nav span:hover,
        nav a:hover {
            color: var(--text-white);
        }
        .lang-container {
            position: relative;
            display: inline-block;
        }
        .lang-select {
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 5px 0;
        }
        .lang-dropdown {
            position: absolute;
            top: 100%;
            right: 0;
            margin-top: 8px;
            background: rgba(20, 10, 35, 0.95);
            border: 1px solid rgba(168, 85, 247, 0.25);
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            width: 130px;
            padding: 6px 0;
            display: none;
            backdrop-filter: blur(10px);
        }
        .lang-dropdown a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            font-size: 13px;
            transition: all 0.2s;
        }
        .lang-dropdown a:hover {
            background: rgba(168, 85, 247, 0.2);
            color: var(--text-white);
        }
        .lang-container:hover .lang-dropdown {
            display: block;
        }

        /* 英雄区 */
        .hero-container {
            padding: 180px 8% 80px 8%;
            min-height: 500px;
            text-align: center;
        }
        .hero-container h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .brand-gradient {
            display: inline-block;
            font-size: 50px;
            font-weight: 900;
            margin-bottom: 20px;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-container p {
            font-size: 15px;
            color: var(--text-gray);
            max-width: 620px;
            margin: 0 auto 30px auto;
        }
        .security-badge {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
            margin-top: 20px;
        }
        .badge-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-gray);
            font-size: 13px;
        }
        .badge-item i {
            color: var(--accent-purple);
            filter: drop-shadow(0 0 6px var(--accent-purple));
        }

        /* 通用区块 */
        .content-section {
            padding: 90px 8%;
        }
        .section-title {
            font-size: 32px;
            font-weight: bold;
            line-height: 1.4;
            margin-bottom: 12px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-gray);
            text-align: center;
            max-width: 560px;
            margin: 0 auto 50px auto;
        }

        /* 下载卡片区 */
        .download-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            max-width: 900px;
            margin: 0 auto;
        }
        .download-card {
            background: var(--card-blend-bg);
            border: 1px solid var(--card-blend-border);
            backdrop-filter: blur(15px);
            border-radius: 16px;
            padding: 40px 30px;
            text-align: center;
            transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .download-card:hover {
            border-color: rgba(168, 85, 247, 0.5);
            transform: translateY(-5px);
            box-shadow: 0 12px 35px rgba(147, 51, 234, 0.2);
        }
        .download-card-icon {
            width: 70px;
            height: 70px;
            border-radius: 20px;
            background: rgba(168, 85, 247, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 34px;
            color: var(--accent-purple);
            margin-bottom: 20px;
            box-shadow: 0 0 20px rgba(168, 85, 247, 0.2);
        }
        .download-card h3 {
            font-size: 22px;
            font-weight: bold;
            margin-bottom: 8px;
        }
        .download-card .version {
            font-size: 13px;
            color: var(--text-gray);
            margin-bottom: 20px;
        }
        .download-card .file-info {
            display: flex;
            gap: 20px;
            margin-bottom: 28px;
            font-size: 12px;
            color: var(--text-gray);
        }
        .file-info span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .btn-download {
            background: var(--gradient-main);
            color: white;
            padding: 14px 36px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: 0.3s;
            box-shadow: 0 10px 25px rgba(168, 85, 247, 0.3);
            border: none;
            cursor: pointer;
        }
        .btn-download:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(168, 85, 247, 0.5);
        }
        .btn-download-outline {
            background: transparent;
            border: 1px solid rgba(168, 85, 247, 0.4);
            color: var(--text-white);
            padding: 14px 36px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: 0.3s;
            cursor: pointer;
        }
        .btn-download-outline:hover {
            background: rgba(168, 85, 247, 0.1);
            border-color: var(--accent-purple);
        }

        /* 安全检测区域 */
        .security-panel {
            background: var(--card-blend-bg);
            border: 1px solid var(--card-blend-border);
            backdrop-filter: blur(15px);
            border-radius: 12px;
            padding: 35px;
            display: flex;
            align-items: center;
            gap: 30px;
            max-width: 700px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .security-panel i {
            font-size: 44px;
            color: var(--accent-purple);
            filter: drop-shadow(0 0 12px rgba(168, 85, 247, 0.4));
        }
        .security-panel h3 {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 8px;
        }
        .security-panel p {
            font-size: 13px;
            color: var(--text-gray);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-inline {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
            max-width: 860px;
            margin-left: auto;
            margin-right: auto;
        }
        .faq-block {
            background: var(--card-blend-bg);
            border: 1px solid var(--card-blend-border);
            backdrop-filter: blur(15px);
            border-radius: 12px;
            padding: 25px;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .faq-block:hover {
            border-color: rgba(168, 85, 247, 0.4);
            box-shadow: 0 6px 20px rgba(147, 51, 234, 0.1);
        }
        .faq-block h3 {
            font-size: 15px;
            font-weight: bold;
            margin-bottom: 12px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-white);
        }
        .faq-block h3 i {
            color: var(--accent-purple);
            font-size: 12px;
        }
        .faq-block p {
            font-size: 13px;
            color: var(--text-gray);
            line-height: 1.6;
            text-align: justify;
        }

        /* 页脚 */
        footer {
            background: #030008;
            padding: 80px 8% 40px 8%;
            font-size: 13px;
            color: #635f70;
            border-top: 1px solid rgba(168, 85, 247, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-col h4 {
            color: var(--text-white);
            margin-bottom: 15px;
            font-size: 14px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #635f70;
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer-col ul li a:hover {
            color: var(--text-white);
        }
        .footer-lang-container {
            position: relative;
            display: inline-block;
            margin-top: 15px;
        }
        .footer-lang-select {
            color: #fff;
            cursor: pointer;
            padding: 8px 12px;
            border: 1px solid rgba(168, 85, 247, 0.3);
            border-radius: 6px;
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 180px;
        }
        .footer-lang-dropdown {
            position: absolute;
            bottom: 100%;
            left: 0;
            margin-bottom: 8px;
            background: rgba(20, 10, 35, 0.98);
            border: 1px solid rgba(168, 85, 247, 0.3);
            border-radius: 8px;
            width: 180px;
            padding: 6px 0;
            display: none;
            z-index: 999;
        }
        .footer-lang-dropdown a {
            display: block;
            padding: 8px 12px;
            color: #b0aac2;
            text-decoration: none;
            font-size: 12px;
        }
        .footer-lang-dropdown a:hover {
            background: rgba(168, 85, 247, 0.2);
            color: #fff;
        }

        /* 响应式 */
        @media (max-width: 768px) {
            header {
                padding: 15px 5%;
            }
            nav {
                display: none;
            }
            .hero-container h1 {
                font-size: 30px;
            }
            .brand-gradient {
                font-size: 36px;
            }
            .download-grid,
            .faq-inline,
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .security-panel {
                flex-direction: column;
                text-align: center;
            }
        }