:root {
            --color-primary: #7c3aed;
            --color-primary-deep: #5b21b6;
            --color-primary-light: #a78bfa;
            --color-accent: #c026d3;
            --color-accent-warm: #e11d48;
            --color-surface: #fefcfb;
            --color-surface-alt: #faf7f5;
            --color-card: #ffffff;
            --color-text: #1e1b1c;
            --color-text-muted: #6b5e62;
            --color-text-light: #8c7a7e;
            --color-border: #e8dfdc;
            --color-border-hover: #d4c5c0;
            --color-shadow: rgba(91, 33, 182, 0.08);
            --color-shadow-hover: rgba(124, 58, 237, 0.16);
            --color-footer-bg: #1a1416;
            --color-footer-text: #c4b5b9;
            --color-tag-bg: #f5f0ee;
            --gradient-hero: linear-gradient(135deg, #5b21b6 0%, #7c3aed 30%, #c026d3 65%, #e11d48 100%);
            --gradient-btn: linear-gradient(135deg, #7c3aed, #c026d3);
            --gradient-btn-hover: linear-gradient(135deg, #6d28d9, #a21caf);
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 24px;
            --radius-full: 50px;
            --transition: 0.22s ease;
        }

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

        body {
            font-family: system-ui, -apple-system, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
            background: var(--color-surface);
            color: var(--color-text);
            line-height: 1.55;
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        .container { max-width: 1240px; margin: 0 auto; padding: 0 20px; }

        /* 导航栏（与首页一致） */
        .header {
            background: rgba(255,255,255,0.94);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            box-shadow: 0 1px 4px var(--color-shadow);
            position: sticky; top: 0; z-index: 50;
            border-bottom: 1px solid var(--color-border);
        }
        .navbar {
            display: flex; align-items: center; justify-content: space-between;
            flex-wrap: wrap; padding: 14px 0; gap: 14px;
        }
        .logo {
            font-size: 1.6rem; font-weight: 750;
            background: var(--gradient-hero);
            background-clip: text; -webkit-background-clip: text; color: transparent;
            letter-spacing: -0.02em; text-decoration: none; white-space: nowrap;
        }
        .nav-links { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; list-style: none; }
        .nav-links a {
            text-decoration: none; font-weight: 520; color: #3d3438;
            transition: color var(--transition); font-size: 0.93rem; white-space: nowrap;
            position: relative;
        }
        .nav-links a::after {
            content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
            background: var(--color-primary); border-radius: 2px; transition: width var(--transition);
        }
        .nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
        .nav-links a:hover, .nav-links a.active { color: var(--color-primary); }
        .nav-links .btn-outline {
            border: 1.5px solid var(--color-border); padding: 7px 18px;
            border-radius: var(--radius-full); background: var(--color-card); font-weight: 520;
            transition: all var(--transition);
        }
        .nav-links .btn-outline::after { display: none; }
        .nav-links .btn-outline:hover {
            background: #faf7f5; border-color: var(--color-primary-light); color: var(--color-primary-deep);
        }

        /* Hero区域（下载页精简版） */
        .hero {
            padding: 56px 0 40px;
            background: linear-gradient(165deg, #fefcfb 0%, #faf6f4 40%, #f5eeeb 100%);
            position: relative; overflow: hidden;
        }
        .hero::before {
            content: ''; position: absolute; top: -100px; right: -80px; width: 380px; height: 380px;
            background: radial-gradient(circle, rgba(192,38,211,0.08) 0%, transparent 70%);
            border-radius: 50%; pointer-events: none; z-index: 0;
        }
        .hero::after {
            content: ''; position: absolute; bottom: -60px; left: -60px; width: 300px; height: 300px;
            background: radial-gradient(circle, rgba(124,58,237,0.07) 0%, transparent 70%);
            border-radius: 50%; pointer-events: none; z-index: 0;
        }
        .hero-inner { text-align: center; position: relative; z-index: 2; }
        .hero-badge {
            display: inline-block; background: #f5f0ee; color: var(--color-primary-deep);
            font-size: 0.8rem; font-weight: 600; padding: 5px 16px;
            border-radius: var(--radius-full); margin-bottom: 14px; letter-spacing: 0.03em;
            border: 1px solid var(--color-border);
        }
        .hero-title {
            font-size: clamp(1.9rem, 4.5vw, 2.8rem); font-weight: 800; line-height: 1.2;
            background: var(--gradient-hero); background-clip: text;
            -webkit-background-clip: text; color: transparent;
            margin-bottom: 12px; letter-spacing: -0.03em;
        }
        .hero-sub {
            font-size: 1.05rem; color: var(--color-text-muted); margin-bottom: 18px;
            max-width: 600px; margin-left: auto; margin-right: auto; line-height: 1.6;
        }

        /* 平台卡片 */
        .platform-section {
            padding: 48px 0 56px; background: var(--color-card);
        }
        .section-heading {
            text-align: center; font-size: 1.7rem; font-weight: 720; color: var(--color-text);
            margin-bottom: 6px; letter-spacing: -0.01em;
        }
        .section-sub {
            text-align: center; color: var(--color-text-muted); margin-bottom: 32px; font-size: 0.95rem;
        }
        .platform-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 22px;
            max-width: 960px; margin: 0 auto;
        }
        .platform-card {
            background: var(--color-surface-alt); border: 1px solid var(--color-border);
            border-radius: var(--radius-lg); padding: 26px 20px; text-align: center;
            display: flex; flex-direction: column; align-items: center; gap: 12px;
            transition: all 0.25s ease; position: relative;
        }
        .platform-card:hover {
            transform: translateY(-4px); border-color: var(--color-primary-light);
            box-shadow: 0 12px 22px -8px var(--color-shadow-hover); background: #fff;
        }
        .platform-icon {
            font-size: 2.4rem; background: linear-gradient(145deg, #f0e8e5, #ede4f7);
            width: 70px; height: 70px; border-radius: 20px; display: flex;
            align-items: center; justify-content: center; margin-bottom: 4px;
        }
        .platform-name {
            font-weight: 720; font-size: 1.2rem; color: #2d1f24;
        }
        .client-recommend {
            font-size: 0.85rem; color: var(--color-text-muted);
            background: #fff; padding: 4px 14px; border-radius: 20px;
            border: 1px solid var(--color-border); display: inline-block;
        }
        .download-btn {
            display: inline-block; background: var(--gradient-btn); color: #fff;
            font-weight: 700; padding: 11px 28px; border-radius: var(--radius-full);
            text-decoration: none; font-size: 0.95rem; transition: all 0.25s ease;
            box-shadow: 0 6px 16px -6px rgba(124,58,237,0.4);
            margin-top: 4px;
        }
        .download-btn:hover {
            background: var(--gradient-btn-hover); transform: translateY(-2px);
            box-shadow: 0 10px 22px -8px rgba(124,58,237,0.55);
        }
        .version-note {
            font-size: 0.72rem; color: var(--color-text-light); margin-top: 2px;
        }
        .card-win { border-top: 4px solid #7c3aed; }
        .card-mac { border-top: 4px solid #c026d3; }
        .card-android { border-top: 4px solid #16a34a; }

        /* 内核说明区块 */
        .kernel-info {
            padding: 48px 0; background: var(--color-surface-alt);
        }
        .kernel-grid {
            display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center;
        }
        .kernel-text h2 {
            font-size: 1.5rem; font-weight: 720; margin-bottom: 10px;
        }
        .kernel-text p {
            color: #3d3438; margin-bottom: 14px; line-height: 1.6;
        }
        .kernel-badge {
            display: inline-block; background: #ede4f7; color: #5b21b6;
            font-size: 0.7rem; font-weight: 700; padding: 4px 12px;
            border-radius: 14px; margin-right: 8px;
        }
        .kernel-visual {
            background: #fff; border-radius: var(--radius-lg); padding: 24px;
            border: 1px solid var(--color-border); text-align: center;
        }
        .kernel-visual code {
            background: #1e1b1c; color: #e0d6d9; padding: 8px 16px;
            border-radius: 12px; display: inline-block; font-size: 0.85rem;
        }

        /* 常见问题 */
        .faq-download {
            padding: 52px 0; background: #fff;
        }
        .faq-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 18px; margin-top: 28px;
        }
        .faq-item {
            background: var(--color-surface-alt); border-radius: var(--radius-md);
            padding: 20px 16px; border: 1px solid var(--color-border);
            transition: all 0.2s;
        }
        .faq-item:hover { border-color: var(--color-primary-light); box-shadow: 0 4px 12px -4px var(--color-shadow); }
        .faq-item h3 { font-size: 1rem; font-weight: 680; margin-bottom: 6px; }
        .faq-item p { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.4; }

        /* CTA 底部号召 */
        .cta-section {
            padding: 48px 0; background: var(--color-footer-bg); color: #e0d6d9;
        }
        .cta-box {
            background: #23191c; border-radius: var(--radius-lg); padding: 30px;
            text-align: center; border: 1px solid #3d3034;
            max-width: 700px; margin: 0 auto;
        }
        .cta-shout { font-size: 1.5rem; font-weight: 800; color: #fff; margin-bottom: 8px; }
        .cta-desc { color: #c4b5b9; margin-bottom: 20px; font-size: 0.95rem; }
        .btn-cta {
            display: inline-block; background: var(--gradient-btn); color: #fff;
            font-weight: 700; padding: 13px 32px; border-radius: var(--radius-full);
            text-decoration: none; font-size: 1rem; transition: all 0.25s;
            box-shadow: 0 8px 18px -6px rgba(124,58,237,0.5);
            margin: 0 8px;
        }
        .btn-cta:hover {
            background: var(--gradient-btn-hover); transform: translateY(-2px);
            box-shadow: 0 12px 24px -8px rgba(124,58,237,0.6);
        }
        .btn-cta-outline {
            background: transparent; border: 1.5px solid #a78bfa; color: #fff;
            box-shadow: none;
        }
        .btn-cta-outline:hover { background: rgba(124,58,237,0.15); }

        /* 页脚 */
        .footer {
            background: #120e10; color: #c4b5b9; padding: 50px 0 28px;
            font-size: 0.85rem; border-top: 1px solid #2a1f23;
        }
        .footer-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
            gap: 34px; margin-bottom: 36px;
        }
        .footer-col h4 { color: #fff; margin-bottom: 14px; font-weight: 620; font-size: 0.9rem; }
        .footer-col a {
            display: block; color: #9c8a8f; text-decoration: none; margin-bottom: 9px;
            transition: color var(--transition); font-size: 0.82rem;
        }
        .footer-col a:hover { color: #fff; }
        .copyright {
            text-align: center; padding-top: 28px; border-top: 1px solid #2a1f23;
            color: #7a6a6f; font-size: 0.76rem;
        }

        /* 响应式 */
        @media (max-width: 768px) {
            .navbar { flex-direction: column; align-items: flex-start; }
            .nav-links { justify-content: flex-start; gap: 16px; width: 100%; flex-wrap: wrap; }
            .hero-title { font-size: 1.7rem; }
            .kernel-grid { grid-template-columns: 1fr; }
            .platform-grid { grid-template-columns: 1fr; max-width: 400px; }
        }
        @media (max-width: 400px) {
            .nav-links a { font-size: 0.8rem; }
            .download-btn { padding: 10px 22px; font-size: 0.88rem; }
        }