:root {
            --blue-400: #60a5fa;
            --blue-500: #3b82f6;
            --blue-600: #2563eb;
            --slate-200: #e2e8f0;
            --slate-300: #cbd5e1;
            --slate-400: #94a3b8;
            --slate-500: #64748b;
            --slate-600: #475569;
            --slate-700: #334155;
            --slate-800: #1e293b;
            --slate-900: #0f172a;
            --emerald-400: #34d399;
            --emerald-500: #10b981;
            --emerald-600: #059669;
            --violet-400: #a78bfa;
            --violet-500: #8b5cf6;
            --violet-600: #7c3aed;
            --amber-400: #fbbf24;
            --amber-500: #f59e0b;
            --rose-400: #fb7185;
            --rose-500: #f43f5e;
            --cyan-400: #22d3ee;
            --cyan-500: #06b6d4;
            --gradient-hero: linear-gradient(160deg, #0f172a 0%, #1a2740 25%, #0d1b33 50%, #0a1628 75%, #0f172a 100%);
            --gradient-ai: linear-gradient(135deg, #7c3aed 0%, #3b82f6 50%, #06b6d4 100%);
            --gradient-edge: linear-gradient(135deg, #059669 0%, #10b981 30%, #34d399 70%, #06b6d4 100%);
            --gradient-windows: linear-gradient(135deg, #3b82f6 0%, #60a5fa 50%, #93c5fd 100%);
            --gradient-android: linear-gradient(135deg, #16a34a 0%, #22c55e 50%, #4ade80 100%);
            --gradient-ios: linear-gradient(135deg, #7c3aed 0%, #8b5cf6 50%, #a78bfa 100%);
            --gradient-macos: linear-gradient(135deg, #6b7280 0%, #9ca3af 50%, #d1d5db 100%);
            --gradient-linux: linear-gradient(135deg, #f59e0b 0%, #fbbf24 50%, #fde68a 100%);
            --glow-blue: 0 0 40px rgba(59, 130, 246, 0.25);
            --glow-violet: 0 0 40px rgba(124, 58, 237, 0.25);
            --glow-emerald: 0 0 40px rgba(16, 185, 129, 0.2);
            --glow-amber: 0 0 40px rgba(245, 158, 11, 0.2);
            --glow-rose: 0 0 35px rgba(244, 63, 94, 0.18);
            --radius-sm: 10px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: #0f172a;
            color: #e2e8f0;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER ========== */
        .header {
            background: rgba(15, 23, 42, 0.88);
            backdrop-filter: blur(18px) saturate(140%);
            -webkit-backdrop-filter: blur(18px) saturate(140%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            position: sticky;
            top: 0;
            z-index: 200;
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.3px;
            background: var(--gradient-ai);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--gradient-ai);
            border-radius: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            font-weight: 900;
            -webkit-text-fill-color: #fff;
            box-shadow: var(--glow-violet);
            position: relative;
        }
        .logo-icon::after {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 14px;
            background: var(--gradient-ai);
            opacity: 0.35;
            z-index: -1;
            filter: blur(10px);
            animation: logoPulse 2.4s ease-in-out infinite;
        }
        @keyframes logoPulse {
            0%,
            100% {
                opacity: 0.3;
                transform: scale(1);
            }
            50% {
                opacity: 0.7;
                transform: scale(1.08);
            }
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav a {
            font-size: 14.5px;
            font-weight: 500;
            color: #cbd5e1;
            letter-spacing: 0.2px;
            position: relative;
            padding: 4px 0;
        }
        .nav a:hover {
            color: #ffffff;
        }
        .nav a.active {
            color: #ffffff;
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: -3px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--gradient-ai);
            border-radius: 2px;
        }
        .nav a.nav-cta {
            background: var(--gradient-ai);
            color: #fff;
            padding: 9px 22px;
            border-radius: 22px;
            font-weight: 600;
            font-size: 13.5px;
            letter-spacing: 0.3px;
            box-shadow: var(--glow-violet);
            transition: all 0.3s;
        }
        .nav a.nav-cta:hover {
            box-shadow: 0 0 50px rgba(124, 58, 237, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            cursor: pointer;
            padding: 6px;
            z-index: 210;
        }
        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #e2e8f0;
            border-radius: 4px;
            transition: 0.3s;
        }
        .mobile-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== PAGE HERO ========== */
        .page-hero {
            background: var(--gradient-hero);
            padding: 56px 0 64px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            text-align: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 550px;
            height: 550px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
            animation: heroGlow 9s ease-in-out infinite;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -25%;
            left: -8%;
            width: 450px;
            height: 450px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
            animation: heroGlow 11s ease-in-out infinite reverse;
        }
        @keyframes heroGlow {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(30px, -22px) scale(1.11);
            }
            66% {
                transform: translate(-16px, 16px) scale(0.93);
            }
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 12.5px;
            font-weight: 600;
            color: #93c5fd;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 18px;
            position: relative;
            z-index: 1;
            backdrop-filter: blur(8px);
        }
        .page-hero .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            background: #60a5fa;
            border-radius: 50%;
            animation: brainPulse 1.8s infinite;
            box-shadow: 0 0 12px rgba(96, 165, 250, 0.7);
        }
        @keyframes brainPulse {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 8px rgba(96, 165, 250, 0.5);
            }
            50% {
                opacity: 0.35;
                box-shadow: 0 0 22px rgba(96, 165, 250, 0.9);
            }
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.15;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: -0.8px;
            position: relative;
            z-index: 1;
        }
        .page-hero h1 .gradient-text {
            background: var(--gradient-ai);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero .hero-sub {
            font-size: 16px;
            color: #94a3b8;
            max-width: 620px;
            margin: 0 auto 6px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.15px;
        }
        .page-hero .hero-highlight {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: #60a5fa;
            font-weight: 600;
            margin-top: 8px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.2px;
        }
        .page-hero .hero-highlight .hl-icon {
            font-size: 16px;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 64px 0;
            position: relative;
        }
        .section-dark {
            background: #0a0f1a;
        }
        .section-alt {
            background: #0f172a;
        }
        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 44px;
        }
        .section-header .tag {
            display: inline-block;
            font-size: 11.5px;
            font-weight: 700;
            letter-spacing: 2.5px;
            text-transform: uppercase;
            color: #93c5fd;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }
        .section-header h2 .gradient-text {
            background: var(--gradient-ai);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header p {
            font-size: 15px;
            color: #94a3b8;
        }

        /* ========== 全平台下载卡片网格 ========== */
        .download-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
            max-width: 1050px;
            margin: 0 auto;
        }
        .download-grid .download-card:last-child {
            grid-column: span 3;
            max-width: 340px;
            justify-self: center;
        }
        .download-card {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            padding: 30px 22px 26px;
            transition: all 0.35s;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            position: relative;
            overflow: hidden;
        }
        .download-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            opacity: 0;
            transition: opacity 0.35s;
            border-radius: 3px 3px 0 0;
        }
        .download-card.card-windows::before {
            background: var(--gradient-windows);
        }
        .download-card.card-android::before {
            background: var(--gradient-android);
        }
        .download-card.card-ios::before {
            background: var(--gradient-ios);
        }
        .download-card.card-macos::before {
            background: var(--gradient-macos);
        }
        .download-card.card-linux::before {
            background: var(--gradient-linux);
        }
        .download-card:hover::before {
            opacity: 1;
        }
        .download-card:hover {
            border-color: rgba(167, 139, 250, 0.25);
            transform: translateY(-6px);
            box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
        }
        .download-card.card-windows:hover {
            box-shadow: var(--glow-blue);
            border-color: rgba(59, 130, 246, 0.3);
        }
        .download-card.card-android:hover {
            box-shadow: 0 0 40px rgba(34, 197, 94, 0.25);
            border-color: rgba(34, 197, 94, 0.3);
        }
        .download-card.card-ios:hover {
            box-shadow: var(--glow-violet);
            border-color: rgba(124, 58, 237, 0.3);
        }
        .download-card.card-macos:hover {
            box-shadow: 0 0 40px rgba(156, 163, 175, 0.2);
            border-color: rgba(156, 163, 175, 0.3);
        }
        .download-card.card-linux:hover {
            box-shadow: var(--glow-amber);
            border-color: rgba(245, 158, 11, 0.3);
        }
        .download-card .platform-icon-wrap {
            width: 68px;
            height: 68px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            margin-bottom: 14px;
            position: relative;
            border: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(255, 255, 255, 0.03);
        }
        .download-card.card-windows .platform-icon-wrap {
            box-shadow: 0 0 24px rgba(59, 130, 246, 0.2);
        }
        .download-card.card-android .platform-icon-wrap {
            box-shadow: 0 0 24px rgba(34, 197, 94, 0.2);
        }
        .download-card.card-ios .platform-icon-wrap {
            box-shadow: 0 0 24px rgba(124, 58, 237, 0.2);
        }
        .download-card.card-macos .platform-icon-wrap {
            box-shadow: 0 0 24px rgba(156, 163, 175, 0.15);
        }
        .download-card.card-linux .platform-icon-wrap {
            box-shadow: 0 0 24px rgba(245, 158, 11, 0.2);
        }
        .download-card h3 {
            font-size: 20px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 4px;
            letter-spacing: -0.3px;
        }
        .download-card .version-tag {
            font-size: 12px;
            color: #94a3b8;
            letter-spacing: 0.2px;
            margin-bottom: 6px;
        }
        .download-card .desc {
            font-size: 13px;
            color: #64748b;
            margin-bottom: 16px;
            flex: 1;
            line-height: 1.5;
        }
        .download-card .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 28px;
            font-weight: 700;
            font-size: 14.5px;
            letter-spacing: 0.3px;
            transition: all 0.3s;
            width: 100%;
            justify-content: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            border: none;
            cursor: pointer;
        }
        .download-card .btn-download::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.18) 0%, transparent 55%);
            pointer-events: none;
        }
        .download-card .btn-download .size-tag {
            font-weight: 400;
            font-size: 11.5px;
            opacity: 0.8;
            letter-spacing: 0.1px;
        }
        .btn-win {
            background: var(--gradient-windows);
            box-shadow: var(--glow-blue);
        }
        .btn-win:hover {
            box-shadow: 0 0 50px rgba(59, 130, 246, 0.5);
            transform: translateY(-2px);
        }
        .btn-android {
            background: var(--gradient-android);
            box-shadow: 0 0 40px rgba(34, 197, 94, 0.25);
        }
        .btn-android:hover {
            box-shadow: 0 0 50px rgba(34, 197, 94, 0.5);
            transform: translateY(-2px);
        }
        .btn-ios {
            background: var(--gradient-ios);
            box-shadow: var(--glow-violet);
        }
        .btn-ios:hover {
            box-shadow: 0 0 50px rgba(124, 58, 237, 0.5);
            transform: translateY(-2px);
        }
        .btn-macos {
            background: var(--gradient-macos);
            box-shadow: 0 0 40px rgba(156, 163, 175, 0.2);
        }
        .btn-macos:hover {
            box-shadow: 0 0 50px rgba(156, 163, 175, 0.4);
            transform: translateY(-2px);
        }
        .btn-linux {
            background: var(--gradient-linux);
            box-shadow: var(--glow-amber);
        }
        .btn-linux:hover {
            box-shadow: 0 0 50px rgba(245, 158, 11, 0.5);
            transform: translateY(-2px);
        }

        /* ========== 数字签名校验面板 ========== */
        .verify-panel {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-xl);
            padding: 36px 32px;
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            overflow: hidden;
        }
        .verify-panel::before {
            content: '';
            position: absolute;
            top: -30%;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.06) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }
        .verify-panel .vp-header {
            text-align: center;
            margin-bottom: 22px;
            position: relative;
            z-index: 1;
        }
        .verify-panel .vp-header h3 {
            font-size: 20px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.3px;
            margin-bottom: 4px;
        }
        .verify-panel .vp-header .vp-sub {
            font-size: 13px;
            color: #64748b;
        }
        .verify-panel .hash-table {
            width: 100%;
            border-collapse: collapse;
            position: relative;
            z-index: 1;
            font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
            font-size: 12px;
        }
        .verify-panel .hash-table thead th {
            background: rgba(255, 255, 255, 0.03);
            padding: 10px 14px;
            text-align: left;
            font-weight: 700;
            color: #cbd5e1;
            letter-spacing: 0.3px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 11px;
            text-transform: uppercase;
        }
        .verify-panel .hash-table tbody td {
            padding: 10px 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            color: #94a3b8;
            word-break: break-all;
            letter-spacing: 0.1px;
        }
        .verify-panel .hash-table tbody tr:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .verify-panel .hash-table .hash-val {
            color: #6ee7b7;
            font-weight: 600;
        }
        .verify-panel .hash-table .badge-verified {
            display: inline-block;
            background: rgba(16, 185, 129, 0.15);
            color: #34d399;
            padding: 3px 10px;
            border-radius: 10px;
            font-size: 10px;
            font-weight: 700;
            letter-spacing: 0.4px;
        }

        /* ========== 30秒安装时间线 ========== */
        .install-timeline {
            display: flex;
            align-items: center;
            gap: 0;
            max-width: 800px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
            position: relative;
        }
        .install-step {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-lg);
            padding: 22px 18px;
            text-align: center;
            flex: 1;
            min-width: 140px;
            max-width: 175px;
            transition: all 0.35s;
            position: relative;
            z-index: 1;
        }
        .install-step:hover {
            border-color: rgba(167, 139, 250, 0.35);
            box-shadow: var(--glow-violet);
            transform: translateY(-4px);
            z-index: 5;
        }
        .install-step .step-circle {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            margin: 0 auto 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 18px;
            letter-spacing: -0.3px;
            background: var(--gradient-ai);
            color: #fff;
            box-shadow: var(--glow-violet);
        }
        .install-step:nth-child(2) .step-circle {
            background: var(--gradient-edge);
            box-shadow: var(--glow-emerald);
        }
        .install-step:nth-child(3) .step-circle {
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
            box-shadow: var(--glow-blue);
        }
        .install-step:nth-child(4) .step-circle {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
            box-shadow: var(--glow-amber);
        }
        .install-step .step-title {
            font-size: 14px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 3px;
            letter-spacing: -0.2px;
        }
        .install-step .step-time {
            font-size: 11px;
            color: #a78bfa;
            font-weight: 700;
            letter-spacing: 0.3px;
        }
        .install-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #475569;
            flex-shrink: 0;
            padding: 0 4px;
            z-index: 1;
        }

        /* ========== 安全认证徽章展示 ========== */
        .badge-showcase {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            max-width: 800px;
            margin: 0 auto;
        }
        .badge-item {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            flex: 1;
            min-width: 180px;
            max-width: 240px;
            transition: all 0.35s;
            cursor: default;
        }
        .badge-item:hover {
            border-color: rgba(16, 185, 129, 0.35);
            box-shadow: var(--glow-emerald);
            transform: translateY(-4px);
        }
        .badge-item .badge-emoji {
            font-size: 40px;
            margin-bottom: 10px;
        }
        .badge-item .badge-name {
            font-size: 15px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.2px;
            margin-bottom: 4px;
        }
        .badge-item .badge-desc {
            font-size: 11.5px;
            color: #64748b;
            letter-spacing: 0.2px;
        }
        .badge-item .badge-check {
            display: inline-block;
            margin-top: 8px;
            background: rgba(16, 185, 129, 0.12);
            color: #34d399;
            padding: 4px 12px;
            border-radius: 12px;
            font-size: 10.5px;
            font-weight: 700;
            letter-spacing: 0.4px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: #0a0f1a;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .cta-box {
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius-xl);
            padding: 44px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            border: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
            overflow: hidden;
        }
        .cta-box::after {
            content: '';
            position: absolute;
            top: -45%;
            right: -14%;
            width: 340px;
            height: 340px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.07) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-box .cta-text h2 {
            font-size: 24px;
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 4px;
            letter-spacing: -0.4px;
            position: relative;
            z-index: 1;
        }
        .cta-box .cta-text p {
            font-size: 14px;
            color: #94a3b8;
            position: relative;
            z-index: 1;
        }
        .cta-box .cta-btn {
            position: relative;
            z-index: 1;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            background: var(--gradient-ai);
            color: #fff;
            padding: 13px 30px;
            border-radius: 28px;
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.3px;
            transition: all 0.3s;
            box-shadow: var(--glow-violet);
            position: relative;
            overflow: hidden;
            border: none;
            cursor: pointer;
        }
        .btn-primary::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 60%);
            pointer-events: none;
        }
        .btn-primary:hover {
            box-shadow: 0 0 55px rgba(124, 58, 237, 0.5);
            transform: translateY(-3px);
            color: #fff;
        }

        /* ========== FOOTER ========== */
        .footer {
            background: #070b14;
            color: #94a3b8;
            padding: 52px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
            font-size: 20px;
        }
        .footer-brand .logo .logo-icon {
            background: var(--gradient-ai);
            -webkit-text-fill-color: #fff;
        }
        .footer-brand p {
            font-size: 13.5px;
            max-width: 280px;
            color: #64748b;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 13.5px;
            color: #64748b;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: #cbd5e1;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12.5px;
            color: #475569;
        }
        .footer-bottom .links {
            display: flex;
            gap: 18px;
        }
        .footer-bottom .links a {
            color: #475569;
            transition: var(--transition);
            font-size: 12.5px;
        }
        .footer-bottom .links a:hover {
            color: #94a3b8;
        }

        /* ========== 下载提示横幅 ========== */
        .download-banner {
            background: rgba(16, 185, 129, 0.06);
            border: 1px solid rgba(16, 185, 129, 0.18);
            border-radius: var(--radius-lg);
            padding: 18px 24px;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        .download-banner .banner-text {
            font-size: 14px;
            color: #cbd5e1;
            letter-spacing: 0.2px;
        }
        .download-banner .banner-text strong {
            color: #34d399;
            font-weight: 700;
        }
        .download-banner .banner-links {
            margin-top: 8px;
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .download-banner .banner-links a {
            font-size: 13px;
            color: #60a5fa;
            font-weight: 600;
            letter-spacing: 0.2px;
            transition: var(--transition);
        }
        .download-banner .banner-links a:hover {
            color: #93c5fd;
            text-decoration: underline;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .download-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .download-grid .download-card:last-child {
                grid-column: span 2;
                max-width: 100%;
            }
            .install-timeline {
                gap: 6px;
            }
            .install-step {
                min-width: 120px;
                max-width: 150px;
                padding: 16px 10px;
            }
            .install-arrow {
                font-size: 14px;
                padding: 0 1px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .badge-showcase {
                gap: 14px;
            }
            .badge-item {
                min-width: 150px;
                max-width: 200px;
            }
        }
        @media (max-width: 768px) {
            .nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(15, 23, 42, 0.96);
                backdrop-filter: blur(20px);
                padding: 20px 24px;
                gap: 14px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
                z-index: 190;
            }
            .nav.open {
                display: flex;
            }
            .nav a.nav-cta {
                width: 100%;
                text-align: center;
            }
            .mobile-toggle {
                display: flex;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero {
                padding: 40px 0 44px;
            }
            .section {
                padding: 44px 0;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .download-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .download-grid .download-card:last-child {
                grid-column: span 1;
            }
            .install-timeline {
                flex-direction: column;
                align-items: center;
                gap: 4px;
            }
            .install-step {
                max-width: 100%;
                width: 100%;
                min-width: auto;
            }
            .install-arrow {
                transform: rotate(90deg);
                font-size: 12px;
            }
            .badge-showcase {
                flex-direction: column;
                align-items: center;
            }
            .badge-item {
                max-width: 100%;
                width: 100%;
            }
            .verify-panel {
                padding: 22px 14px;
            }
            .verify-panel .hash-table {
                font-size: 10px;
            }
            .verify-panel .hash-table thead th,
            .verify-panel .hash-table tbody td {
                padding: 8px 10px;
            }
            .cta-box {
                padding: 24px 16px;
                flex-direction: column;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .page-hero h1 {
                font-size: 22px;
            }
            .page-hero .hero-sub {
                font-size: 13px;
            }
            .section-header h2 {
                font-size: 20px;
            }
            .download-card {
                padding: 20px 14px;
            }
            .download-card h3 {
                font-size: 17px;
            }
            .download-card .btn-download {
                font-size: 13px;
                padding: 10px 20px;
            }
            .btn-primary {
                padding: 11px 20px;
                font-size: 13.5px;
            }
            .verify-panel .hash-table {
                font-size: 9px;
            }
            .install-step .step-circle {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
            .install-step .step-title {
                font-size: 12px;
            }
            .page-hero .hero-badge {
                font-size: 10.5px;
                padding: 5px 12px;
            }
        }