:root {
            --bg: #0e0e12;
            --bg-elevated: #16161c;
            --bg-card: #1c1c24;
            --bg-card-hover: #22222c;
            --border: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.14);
            --gold: #c9a84c;
            --gold-light: #e2c87a;
            --gold-soft: rgba(201, 168, 76, 0.12);
            --gold-glow: rgba(201, 168, 76, 0.06);
            --cream: #f0ead6;
            --cream-muted: #c8c2ae;
            --text: #ece8de;
            --text-secondary: #9e9a8f;
            --text-muted: #6a6660;
            --accent-warm: #d4735a;
            --accent-warm-soft: rgba(212, 115, 90, 0.12);
            --accent-teal: #5a9e8f;
            --accent-teal-soft: rgba(90, 158, 143, 0.12);
            --font-display: 'Instrument Serif', Georgia, serif;
            --font-body: 'Source Serif 4', Georgia, serif;
            --font-mono: 'DM Mono', 'Courier New', monospace;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            overflow-x: hidden;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }

        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
            pointer-events: none;
            z-index: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
        }
        ul {
            list-style: none;
        }

        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 2.5rem;
        }

        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(14, 14, 18, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo {
            font-family: var(--font-display);
            font-size: 1.55rem;
            color: var(--cream);
            letter-spacing: -0.01em;
        }
        .logo em {
            color: var(--gold);
            font-style: italic;
        }
        .site-nav ul {
            display: flex;
            gap: 0.35rem;
        }
        .site-nav a {
            font-family: var(--font-mono);
            font-size: 0.78rem;
            color: var(--text-muted);
            padding: 0.5rem 1rem;
            border-radius: 6px;
            transition: all 0.2s ease;
            letter-spacing: 0.02em;
        }
        .site-nav a:hover {
            color: var(--cream);
            background: rgba(255, 255, 255, 0.04);
        }
        .site-nav a[aria-current="page"] {
            color: var(--gold);
            background: var(--gold-soft);
        }

        main {
            position: relative;
            z-index: 1;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1.75rem;
            border-radius: 6px;
            font-family: var(--font-mono);
            font-size: 0.82rem;
            font-weight: 500;
            cursor: pointer;
            border: none;
            transition: all 0.25s ease;
            letter-spacing: 0.03em;
            background: transparent;
            color: var(--cream-muted);
            border: 1px solid var(--border-strong);
            white-space: nowrap;
        }
        .btn:hover {
            border-color: var(--gold);
            color: var(--gold);
            transform: translateY(-1px);
            background: var(--gold-soft);
        }
        .btn-primary {
            background: var(--gold);
            color: var(--bg);
            border: none;
        }
        .btn-primary:hover {
            background: var(--gold-light);
            box-shadow: 0 8px 30px rgba(201, 168, 76, 0.2);
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 0.5rem 1.1rem;
            font-size: 0.72rem;
        }

        /* 下载导航地图 */
        .device-map {
            padding: 5rem 0 3rem;
            text-align: center;
        }
        .device-map h1 {
            font-family: var(--font-display);
            font-size: clamp(3rem, 6vw, 4.5rem);
            font-weight: 400;
            color: var(--cream);
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }
        .device-map h1 em {
            font-style: italic;
            color: var(--gold);
        }
        .device-map .sub-title {
            font-family: var(--font-body);
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 2.5rem;
            font-style: italic;
        }
        .device-icons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.5rem;
            margin-top: 1rem;
        }
        .device-icon {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.6rem;
            cursor: pointer;
            transition: transform 0.25s ease;
            background: none;
            border: none;
            color: var(--text-muted);
            font-family: var(--font-mono);
            font-size: 0.72rem;
            padding: 0.8rem 1.2rem;
            border-radius: 12px;
            background: var(--bg-elevated);
            border: 1px solid var(--border);
            letter-spacing: 0.04em;
            min-width: 80px;
        }
        .device-icon:hover {
            transform: translateY(-6px);
            border-color: var(--gold);
            color: var(--gold);
            background: var(--bg-card-hover);
            box-shadow: 0 12px 28px rgba(0,0,0,0.5);
        }
        .device-icon svg {
            width: 32px;
            height: 32px;
            stroke: currentColor;
            transition: stroke 0.2s;
        }
        .device-icon:hover svg {
            stroke: var(--gold);
        }

        /* 平台区块 */
        .platform-section {
            padding: 5rem 0;
            border-top: 1px solid var(--border);
        }
        .platform-section:nth-of-type(odd) {
            background: rgba(22,22,28,0.5);
        }

        .platform-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: start;
        }
        .platform-info h2 {
            font-family: var(--font-display);
            font-size: 2.6rem;
            font-weight: 400;
            color: var(--cream);
            letter-spacing: -0.01em;
            margin-bottom: 1rem;
        }
        .platform-info h2 span {
            color: var(--gold);
            font-style: italic;
        }
        .platform-info .meta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1.25rem 0;
        }
        .meta-badge {
            font-family: var(--font-mono);
            font-size: 0.68rem;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            background: var(--bg-card);
            color: var(--text-secondary);
            letter-spacing: 0.04em;
            border: 1px solid var(--border);
        }
        .platform-info .desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 1.5rem;
        }
        .platform-info .desc strong {
            color: var(--cream);
            font-weight: 500;
        }
        .platform-detail-list {
            margin: 1.5rem 0;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .detail-item {
            display: flex;
            align-items: baseline;
            gap: 0.8rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
            border-left: 2px solid var(--border);
            padding-left: 1rem;
            transition: border-color 0.2s;
        }
        .detail-item:hover {
            border-left-color: var(--gold);
        }
        .detail-item strong {
            font-family: var(--font-mono);
            font-size: 0.7rem;
            color: var(--gold);
            min-width: 70px;
            letter-spacing: 0.05em;
        }
        .platform-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin-top: 1.8rem;
        }
        .platform-visual {
            background: var(--bg-elevated);
            border: 1px solid var(--border-strong);
            border-radius: 14px;
            padding: 2rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            min-height: 280px;
        }
        .platform-visual .client-icon {
            width: 70px;
            height: 70px;
            margin-bottom: 1.2rem;
            color: var(--gold);
        }
        .platform-visual .version-tag {
            font-family: var(--font-mono);
            font-size: 0.7rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }
        .platform-visual .arch-list {
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
            justify-content: center;
            margin: 1rem 0;
        }
        .arch-list span {
            background: var(--bg-card);
            padding: 0.3rem 0.8rem;
            border-radius: 5px;
            font-family: var(--font-mono);
            font-size: 0.68rem;
            color: var(--text-secondary);
            letter-spacing: 0.04em;
        }
        .tutorial-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-family: var(--font-mono);
            font-size: 0.75rem;
            color: var(--accent-teal);
            margin-top: 1rem;
            transition: color 0.2s;
        }
        .tutorial-link:hover {
            color: var(--gold);
        }

        footer {
            border-top: 1px solid var(--border);
            padding: 3rem 0;
            position: relative;
            z-index: 1;
        }
        footer .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .footer-left {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .footer-logo {
            font-family: var(--font-display);
            font-size: 1.15rem;
            color: var(--cream);
        }
        .footer-logo em {
            color: var(--gold);
            font-style: italic;
        }
        .footer-copy {
            font-family: var(--font-mono);
            font-size: 0.72rem;
            color: var(--text-muted);
        }
        .footer-links {
            display: flex;
            gap: 2rem;
        }
        .footer-links a {
            font-family: var(--font-mono);
            font-size: 0.76rem;
            color: var(--text-muted);
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: var(--gold);
        }

        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .platform-section {
            animation: fadeUp 0.6s ease forwards;
            opacity: 0;
        }
        .platform-section:nth-child(1) { animation-delay: 0.05s; }
        .platform-section:nth-child(2) { animation-delay: 0.15s; }
        .platform-section:nth-child(3) { animation-delay: 0.25s; }
        .platform-section:nth-child(4) { animation-delay: 0.35s; }
        .platform-section:nth-child(5) { animation-delay: 0.45s; }

        @media (max-width: 900px) {
            .platform-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .platform-visual {
                order: -1;
                min-height: auto;
                padding: 1.8rem;
            }
            .device-map h1 {
                font-size: 2.8rem;
            }
            footer .container {
                flex-direction: column;
                gap: 1.5rem;
                text-align: center;
            }
            .footer-left {
                flex-direction: column;
                gap: 0.5rem;
            }
        }
        @media (max-width: 600px) {
            .container {
                padding: 0 1.25rem;
            }
            header .container {
                flex-direction: column;
                height: auto;
                padding-top: 0.75rem;
                padding-bottom: 0.75rem;
                gap: 0.5rem;
            }
            .device-icons {
                gap: 0.8rem;
            }
            .device-icon {
                padding: 0.5rem 0.8rem;
                font-size: 0.65rem;
            }
            .platform-info h2 {
                font-size: 2rem;
            }
            .platform-actions {
                flex-direction: column;
            }
            .platform-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }