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

        :root {
            --cyan: #22d3ee;
            --cyan-soft: #a5f3fc;
            --cyan-glow: rgba(34, 211, 238, 0.35);
            --bg-deep: #05070a;
            --bg-card: #0e131f;
            --border-subtle: #1e2a3e;
            --text-primary: #eef2ff;
            --text-secondary: #9ca8bf;
            --text-muted: #6c86a3;
            --radius-lg: 32px;
            --radius-full: 60px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
            background-color: #0a0c12;
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ── Header ── */
        .header {
            background: rgba(10, 12, 18, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(56, 189, 248, 0.12);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 16px 0;
            gap: 18px;
        }
        .logo {
            font-size: 1.9rem;
            font-weight: 700;
            letter-spacing: -1px;
            background: linear-gradient(120deg, #a5f3fc, #22d3ee);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            list-style: none;
            font-weight: 500;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            color: #cbd5e6;
            transition: var(--transition-fast);
            font-size: 0.95rem;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--cyan);
            text-shadow: 0 0 6px var(--cyan-glow);
        }
        .btn-outline-light {
            background: transparent;
            border: 1px solid var(--cyan);
            color: var(--cyan);
            padding: 8px 20px;
            border-radius: var(--radius-full);
            font-weight: 500;
            transition: var(--transition-fast);
            cursor: pointer;
            font-size: 0.9rem;
            white-space: nowrap;
            text-decoration: none;
            display: inline-block;
        }
        .btn-outline-light:hover {
            background: rgba(34, 211, 238, 0.1);
            box-shadow: 0 0 10px var(--cyan-glow);
        }

        /* ── Page Hero ── */
        .page-hero {
            padding: 70px 0 40px;
            text-align: center;
            background: radial-gradient(circle at 50% 0%, #11161f, #05070a);
            border-bottom: 1px solid #1e293b;
        }
        .page-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(to right, #f0f9ff, #7dd3fc);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 12px;
        }
        .page-hero .subtitle {
            font-size: 1.1rem;
            color: #8a99b4;
            max-width: 600px;
            margin: 0 auto;
        }

        /* ── Download Cards ── */
        .download-section {
            padding: 60px 0 70px;
            background: #05080f;
        }
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .download-card {
            background: #0e131f;
            border-radius: 28px;
            padding: 32px 24px 28px;
            border: 1px solid #1e2a3e;
            transition: var(--transition-fast);
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .download-card::after {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 100px;
            height: 100px;
            background: radial-gradient(circle, rgba(34,211,238,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .download-card:hover {
            border-color: var(--cyan);
            box-shadow: 0 16px 32px -12px rgba(34, 211, 238, 0.22);
            transform: translateY(-3px);
        }
        .dc-icon {
            font-size: 3.2rem;
            margin-bottom: 16px;
            filter: drop-shadow(0 0 8px rgba(34,211,238,0.3));
        }
        .download-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #e2efff;
            margin-bottom: 6px;
        }
        .download-card .dc-desc {
            font-size: 0.9rem;
            color: #8a99b4;
            margin-bottom: 20px;
            min-height: 40px;
        }
        .dc-buttons {
            display: flex;
            flex-direction: column;
            gap: 10px;
            width: 100%;
        }
        .btn-download {
            background: #0f172a;
            border: 1.5px solid var(--cyan);
            color: #e2efff;
            padding: 11px 22px;
            border-radius: 44px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition-fast);
            box-shadow: 0 0 8px rgba(34, 211, 238, 0.12);
            font-size: 0.9rem;
            display: inline-block;
        }
        .btn-download:hover {
            background: rgba(34, 211, 238, 0.1);
            border-color: #67e8f9;
            box-shadow: 0 0 18px var(--cyan-glow);
        }
        .btn-guide {
            background: transparent;
            border: 1px solid #334155;
            color: #9ca8bf;
            padding: 9px 18px;
            border-radius: 44px;
            font-weight: 500;
            text-decoration: none;
            transition: var(--transition-fast);
            font-size: 0.85rem;
        }
        .btn-guide:hover {
            border-color: #556b85;
            color: #cbd5e6;
            background: #1a2332;
        }
        .dc-version {
            font-size: 0.7rem;
            color: #4c617b;
            margin-top: 14px;
            letter-spacing: 0.3px;
        }

        /* ── SEO content block ── */
        .seo-download-info {
            padding: 70px 0;
            background: #060910;
            border-top: 1px solid #111826;
            border-bottom: 1px solid #111826;
        }
        .seo-download-info .prose {
            max-width: 860px;
            margin: 0 auto;
            color: #9aaebe;
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .seo-download-info h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: #dce6f5;
            margin-bottom: 18px;
            letter-spacing: -0.3px;
            text-align: center;
        }
        .seo-download-info h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #c5d4eb;
            margin: 28px 0 10px;
        }
        .seo-download-info p {
            margin-bottom: 14px;
        }
        .seo-download-info strong {
            color: #cbd5e6;
            font-weight: 600;
        }
        .seo-download-info ul {
            list-style: none;
            margin: 10px 0 16px;
        }
        .seo-download-info ul li {
            padding: 5px 0 5px 20px;
            position: relative;
            color: #b0bfd4;
        }
        .seo-download-info ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--cyan);
            font-weight: 700;
        }

        /* ── Internal Links Section ── */
        .internal-links {
            padding: 60px 0;
            background: #05080f;
            text-align: center;
        }
        .internal-links .links-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            margin-top: 24px;
        }
        .internal-link-card {
            background: #0e131f;
            border: 1px solid #1e2a3e;
            border-radius: 24px;
            padding: 16px 24px;
            color: #cbd5e6;
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
        }
        .internal-link-card:hover {
            border-color: var(--cyan);
            box-shadow: 0 8px 20px -8px rgba(34,211,238,0.2);
            color: #fff;
        }

        /* ── Install & Verify Section ── */
        .install-verify {
            padding: 70px 0;
            background: #080b14;
            border-top: 1px solid #111826;
        }
        .install-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .install-card {
            background: #0d111c;
            border-radius: 24px;
            padding: 28px 22px;
            border: 1px solid #1a2436;
            position: relative;
        }
        .install-card h4 {
            font-weight: 700;
            color: #dce6f5;
            margin-bottom: 12px;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .install-card p, .install-card li {
            font-size: 0.85rem;
            color: #8a99b4;
            margin-bottom: 6px;
        }
        .install-card ul {
            list-style: none;
            padding-left: 0;
        }
        .install-card ul li {
            padding: 4px 0 4px 18px;
            position: relative;
        }
        .install-card ul li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--cyan);
        }
        .hash-code {
            background: #0a101a;
            padding: 8px 12px;
            border-radius: 12px;
            font-family: monospace;
            font-size: 0.8rem;
            color: #67e8f9;
            word-break: break-all;
            margin: 8px 0;
            display: inline-block;
        }

        /* ── Update Log ── */
        .update-log {
            padding: 60px 0;
            background: #060910;
            border-top: 1px solid #111826;
        }
        .log-timeline {
            max-width: 700px;
            margin: 28px auto 0;
            border-left: 2px solid #1e2a3e;
            padding-left: 24px;
        }
        .log-item {
            margin-bottom: 22px;
            position: relative;
        }
        .log-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 6px;
            width: 10px;
            height: 10px;
            background: var(--cyan);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--cyan-glow);
        }
        .log-version {
            font-weight: 700;
            color: #dce6f5;
            font-size: 0.95rem;
            margin-bottom: 4px;
        }
        .log-date {
            font-size: 0.7rem;
            color: #4c617b;
            margin-left: 10px;
            font-weight: 400;
        }
        .log-details {
            font-size: 0.85rem;
            color: #8a99b4;
            line-height: 1.5;
        }

        /* ── CTA ── */
        .cta-block {
            background: linear-gradient(95deg, #0b1120, #03070f);
            border-top: 1px solid #1e2a3a;
            padding: 60px 0;
            text-align: center;
        }
        .cta-block h2 {
            font-size: 1.9rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .cta-block p {
            color: #8a99b4;
            margin-bottom: 24px;
        }

        /* ── Footer ── */
        .footer {
            background: #020408;
            padding: 50px 0 28px;
            border-top: 1px solid #111826;
        }
        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 38px;
        }
        .footer-col h5 {
            font-weight: 600;
            color: #b9c8df;
            margin-bottom: 10px;
            font-size: 0.9rem;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            color: #6c86a3;
            text-decoration: none;
            font-size: 0.85rem;
            display: block;
            margin-bottom: 6px;
            transition: var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--cyan);
        }
        .copyright {
            text-align: center;
            margin-top: 42px;
            color: #4c617b;
            font-size: 0.8rem;
        }

        /* ── Responsive ── */
        @media (max-width: 780px) {
            .page-hero h1 {
                font-size: 2rem;
            }
            .nav-links {
                gap: 16px;
            }
            .download-card {
                padding: 24px 18px;
            }
            .seo-download-info .prose {
                font-size: 0.9rem;
            }
        }
        @media (max-width: 480px) {
            .nav-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .container {
                padding: 0 16px;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .internal-links .links-wrapper {
                flex-direction: column;
                align-items: center;
            }
        }