:root {
            --primary: #00d294;
            --primary-deep: #009d6b;
            --primary-soft: rgba(0, 210, 148, 0.12);
            --accent: #00c6ff;
            --bg-root: #0b0f19;
            --bg-card: #151c2c;
            --bg-card-hover: #1b2338;
            --bg-lift: #1a2234;
            --text-main: #ffffff;
            --text-sub: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(255, 255, 255, 0.07);
            --border-glow: rgba(0, 210, 148, 0.25);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Noto Sans SC", sans-serif;
            background-color: var(--bg-root);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER ========== */
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin: 20px auto;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-color);
            position: relative;
            z-index: 10;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .brand:hover {
            opacity: 0.85;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), #0091c7);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 4px 14px rgba(0, 210, 148, 0.3);
        }
        .version-badge {
            font-size: 10px;
            background: var(--primary-soft);
            color: var(--primary);
            border: 1px solid rgba(0, 210, 148, 0.35);
            padding: 3px 10px;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            font-weight: 600;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 34px;
            align-items: center;
        }
        nav a {
            font-size: 14.5px;
            color: var(--text-sub);
            transition: var(--transition);
            position: relative;
            padding: 6px 0;
            font-weight: 500;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        nav a:hover,
        nav a.active {
            color: #fff;
        }
        nav a:hover::after,
        nav a.active::after {
            width: 100%;
        }

        /* ========== HERO ========== */
        .hero {
            padding: 56px 0 50px;
            text-align: center;
            position: relative;
        }
        .hero::before {
            content: "";
            position: absolute;
            top: 5%;
            left: 50%;
            transform: translateX(-50%);
            width: 680px;
            height: 360px;
            background: radial-gradient(ellipse, rgba(0, 210, 148, 0.13) 0%, rgba(0, 150, 200, 0.06) 35%, rgba(0, 0, 0, 0) 72%);
            z-index: -1;
            pointer-events: none;
            animation: heroPulse 8s ease-in-out infinite;
        }
        @keyframes heroPulse {
            0%,
            100% {
                opacity: 0.7;
                transform: translateX(-50%) scale(1);
            }
            50% {
                opacity: 1;
                transform: translateX(-50%) scale(1.08);
            }
        }
        .hero-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            padding: 7px 18px;
            border-radius: 30px;
            font-size: 13px;
            color: var(--primary);
            margin-bottom: 26px;
            letter-spacing: 0.3px;
        }
        .hero h1 {
            font-size: 54px;
            font-weight: 900;
            line-height: 1.14;
            margin-bottom: 18px;
            letter-spacing: -1.5px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--primary) 0%, #00d9ff 60%, #00e5c0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 17px;
            color: var(--text-sub);
            max-width: 640px;
            margin: 0 auto 38px;
            line-height: 1.7;
        }
        .cta-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 56px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #000;
            font-weight: 700;
            font-size: 16px;
            padding: 16px 38px;
            border-radius: 10px;
            box-shadow: 0 10px 28px rgba(0, 210, 148, 0.28);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .btn-primary::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.25) 0%, transparent 60%);
            opacity: 0;
            transition: opacity 0.4s;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 34px rgba(0, 210, 148, 0.4);
        }
        .btn-primary:hover::before {
            opacity: 1;
        }
        .btn-outline {
            border: 1px solid rgba(255, 255, 255, 0.18);
            background: rgba(255, 255, 255, 0.03);
            color: var(--text-main);
            font-weight: 600;
            font-size: 16px;
            padding: 16px 38px;
            border-radius: 10px;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(255, 255, 255, 0.28);
            transform: translateY(-2px);
        }

        /* ========== DASHBOARD CARDS ========== */
        .dashboard-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 56px;
        }
        .dash-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            text-align: left;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .dash-card::after {
            content: '';
            position: absolute;
            top: -30px;
            right: -30px;
            width: 80px;
            height: 80px;
            background: radial-gradient(circle, rgba(0, 210, 148, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .dash-card:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
        }
        .dash-card .card-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 14px;
            color: var(--text-sub);
            font-size: 12.5px;
            letter-spacing: 0.4px;
            position: relative;
            z-index: 1;
        }
        .dash-card .icon-box {
            width: 34px;
            height: 34px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
        }
        .dash-card .value {
            font-size: 34px;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.15;
            position: relative;
            z-index: 1;
        }
        .dash-card .value span {
            font-size: 15px;
            color: var(--primary);
            font-weight: 600;
        }
        .dash-card .desc {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 6px;
            position: relative;
            z-index: 1;
        }

        /* ========== SECURITY BANNER ========== */
        .security-banner {
            background: linear-gradient(100deg, rgba(0, 210, 148, 0.07) 0%, rgba(0, 180, 220, 0.06) 100%);
            border: 1px solid rgba(0, 210, 148, 0.18);
            border-radius: var(--radius-lg);
            padding: 22px 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 72px;
            transition: var(--transition);
        }
        .security-banner:hover {
            border-color: rgba(0, 210, 148, 0.35);
        }
        .security-info {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .security-info .badge {
            background: var(--primary);
            color: #000;
            font-weight: 800;
            padding: 7px 14px;
            border-radius: 6px;
            font-size: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            line-height: 1;
            letter-spacing: 0.5px;
        }
        .security-info p {
            font-weight: 600;
            font-size: 14.5px;
            margin: 0;
            line-height: 1;
            color: #e2e8f0;
        }

        /* ========== TRUST STRIP ========== */
        .trust-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            padding: 32px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 76px;
            text-align: center;
        }
        .trust-item h4 {
            font-size: 15px;
            color: var(--text-main);
            margin-bottom: 4px;
            font-weight: 700;
        }
        .trust-item p {
            font-size: 12px;
            color: var(--text-sub);
            letter-spacing: 0.2px;
        }

        /* ========== SECTION HEADER ========== */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 900;
            margin-bottom: 10px;
            letter-spacing: -0.8px;
        }
        .section-header p {
            color: var(--text-sub);
            font-size: 15.5px;
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== FEATURES GRID ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
            margin-bottom: 90px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px 28px;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0;
            transition: opacity 0.4s;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(255, 255, 255, 0.18);
            background: var(--bg-card-hover);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card .f-icon {
            font-size: 34px;
            margin-bottom: 18px;
            display: inline-block;
            transition: transform 0.3s;
        }
        .feature-card:hover .f-icon {
            transform: scale(1.1);
        }
        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.3px;
        }
        .feature-card p {
            color: var(--text-sub);
            font-size: 13.5px;
            line-height: 1.7;
        }

        /* ========== CREATIVE SECTION: 场景拼图 ========== */
        .scenes-section {
            margin-bottom: 90px;
        }
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }
        .scene-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 26px 20px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            cursor: default;
        }
        .scene-card:hover {
            background: var(--bg-lift);
            border-color: rgba(255, 255, 255, 0.14);
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
        }
        .scene-card .scene-emoji {
            font-size: 40px;
            display: block;
            margin-bottom: 14px;
            transition: transform 0.4s;
        }
        .scene-card:hover .scene-emoji {
            transform: scale(1.15) rotate(-4deg);
        }
        .scene-card h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 6px;
            color: #f1f5f9;
        }
        .scene-card p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== CREATIVE SECTION: 数据脉搏 ========== */
        .pulse-section {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            margin-bottom: 90px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            overflow: hidden;
        }
        .pulse-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(0, 210, 148, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .pulse-left h3 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 10px;
            letter-spacing: -0.5px;
        }
        .pulse-left p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        .pulse-right {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            position: relative;
            z-index: 1;
        }
        .pulse-stat {
            text-align: center;
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius-md);
            padding: 20px 14px;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        .pulse-stat .ps-value {
            font-size: 28px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.1;
        }
        .pulse-stat .ps-label {
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 4px;
            letter-spacing: 0.3px;
        }

        /* ========== PLATFORMS ========== */
        .platforms-section {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
            margin-bottom: 90px;
        }
        .platform-icons {
            display: flex;
            justify-content: center;
            gap: 36px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .platform-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            color: var(--text-sub);
            font-size: 13.5px;
            transition: var(--transition);
        }
        .platform-item:hover {
            color: #fff;
            transform: translateY(-2px);
        }
        .platform-icon-box {
            width: 62px;
            height: 62px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            transition: var(--transition);
        }
        .platform-item:hover .platform-icon-box {
            border-color: rgba(0, 210, 148, 0.4);
            box-shadow: 0 6px 20px rgba(0, 210, 148, 0.12);
            background: rgba(0, 210, 148, 0.05);
        }

        /* ========== FOOTER ========== */
        footer {
            background: #070a10;
            border-top: 1px solid var(--border-color);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 44px;
        }
        .footer-about p {
            color: var(--text-sub);
            font-size: 13.5px;
            margin-top: 14px;
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 14.5px;
            margin-bottom: 18px;
            color: var(--text-main);
            font-weight: 700;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 11px;
        }
        .footer-col a {
            color: var(--text-sub);
            font-size: 13.5px;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 26px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .dashboard-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenes-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pulse-section {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero h1 {
                font-size: 40px;
            }
        }
        @media (max-width: 640px) {
            header {
                flex-direction: column;
                gap: 16px;
            }
            nav ul {
                gap: 18px;
                flex-wrap: wrap;
                justify-content: center;
            }
            .dashboard-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenes-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .pulse-section {
                padding: 28px 20px;
            }
            .pulse-right {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .platform-icons {
                gap: 20px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 15px;
            }
            .cta-group {
                flex-direction: column;
                align-items: center;
            }
            .security-banner {
                flex-direction: column;
                gap: 14px;
                text-align: center;
                padding: 18px 20px;
            }
            .security-info {
                flex-direction: column;
                gap: 10px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .trust-strip {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .dash-card .value {
                font-size: 26px;
            }
        }