*, *::before, *::after {
            box-sizing: border-box;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
            100% { transform: translateY(0px); }
        }
        @keyframes pulseGlow {
            0% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4); }
            70% { box-shadow: 0 0 0 15px rgba(37, 99, 235, 0); }
            100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
        }
        body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            color: #1e293b;
            background-color: #f8fafc;
            line-height: 1.625;
        }
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 76px;
            display: table;
            width: 100%;
        }
        .logo-box {
            display: table-cell;
            vertical-align: middle;
            width: 280px;
        }
        .logo-link {
            text-decoration: none;
            color: #0f172a;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: -0.5px;
        }
        .logo-img {
            vertical-align: middle;
            margin-right: 12px;
            width: 34px;
            height: 34px;
            object-fit: contain;
        }
        .menu-box {
            display: table-cell;
            vertical-align: middle;
            text-align: right;
        }
        .menu-box a {
            color: #475569;
            text-decoration: none;
            margin-left: 32px;
            font-size: 15px;
            font-weight: 600;
            transition: color 0.25s ease;
            vertical-align: middle;
        }
        .menu-box a:hover, .menu-box a.active {
            color: #2563eb;
        }
        .github-btn {
            display: inline-block;
            background: #0f172a;
            color: #ffffff !important;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 14px !important;
            font-weight: 600;
            margin-left: 32px;
            transition: all 0.25s ease !important;
            border: 1px solid #0f172a;
            box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
        }
        .github-btn:hover {
            background: #1e293b !important;
            border-color: #1e293b;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(15, 23, 42, 0.25);
        }
        .github-btn svg {
            vertical-align: middle;
            margin-right: 6px;
            fill: #ffffff;
        }
        .hero-section {
            padding: 100px 24px;
            background: radial-gradient(100% 100% at 50% 0%, rgba(219, 234, 254, 0.4) 0%, rgba(255, 255, 255, 0) 100%);
            border-bottom: 1px solid #e2e8f0;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
        }
        .hero-layout {
            display: table;
            width: 100%;
        }
        .hero-text {
            display: table-cell;
            vertical-align: middle;
            width: 55%;
            padding-right: 60px;
            animation: fadeIn 0.8s ease-out;
        }
        .hero-image-slot {
            display: table-cell;
            vertical-align: middle;
            width: 45%;
            animation: fadeIn 0.8s ease-out 0.2s both;
        }
        h1 {
            font-size: 44px;
            color: #0f172a;
            line-height: 1.2;
            margin: 0 0 24px 0;
            font-weight: 800;
            letter-spacing: -1px;
        }
        .hero-p {
            font-size: 17px;
            color: #475569;
            margin: 0 0 36px 0;
            line-height: 1.7;
        }
        .btn-group a {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 16px;
            text-decoration: none;
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-primary {
            background-color: #2563eb;
            color: #ffffff;
            margin-right: 16px;
            border: 1px solid #2563eb;
            animation: pulseGlow 2s infinite;
        }
        .btn-primary:hover {
            background-color: #1d4ed8;
            border-color: #1d4ed8;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
        }
        .btn-secondary {
            background-color: #ffffff;
            color: #334155;
            border: 1px solid #cbd5e1;
            box-shadow: 0 1px 2px rgba(0,0,0,0.05);
        }
        .btn-secondary:hover {
            background-color: #f8fafc;
            border-color: #94a3b8;
            transform: translateY(-2px);
        }
        .image-placeholder {
            width: 100%;
            height: 320px;
            background: linear-gradient(135deg, #ffffff 0%, #e2e8f0 100%);
            border-radius: 16px;
            border: 1px solid #cbd5e1;
            box-shadow: 0 20px 40px -15px rgba(15,23,42,0.12);
            text-align: center;
            position: relative;
            animation: float 4s ease-in-out infinite;
        }
        .image-placeholder span {
            display: block;
            padding-top: 145px;
            color: #475569;
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.5px;
        }
        .video-wrapper {
            margin-top: 60px;
            background-color: #0f172a;
            border-radius: 16px;
            padding: 12px;
            box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
            animation: fadeIn 0.8s ease-out 0.4s both;
        }
        .video-container {
            position: relative;
            padding-bottom: 56.25%;
            height: 0;
            overflow: hidden;
            border-radius: 10px;
            background-color: #1e293b;
        }
        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: 0;
        }
        .section-title {
            text-align: center;
            font-size: 30px;
            color: #0f172a;
            margin: 90px 0 50px 0;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .section-title::after {
            content: "";
            display: block;
            width: 48px;
            height: 4px;
            background: #2563eb;
            margin: 12px auto 0 auto;
            border-radius: 2px;
        }
        .grid-layout {
            display: table;
            width: 100%;
            table-layout: fixed;
            border-collapse: separate;
            border-spacing: 24px 0;
            margin-bottom: 40px;
        }
        .grid-col {
            display: table-cell;
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            padding: 32px 24px;
            vertical-align: top;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
        }
        .grid-col:hover {
            border-color: #cbd5e1;
            transform: translateY(-6px);
            box-shadow: 0 20px 25px -5px rgba(0,0,0,0.05), 0 10px 10px -5px rgba(0,0,0,0.04);
        }
        .icon-box {
            width: 48px;
            height: 48px;
            background-color: #eff6ff;
            border-radius: 10px;
            margin-bottom: 20px;
            text-align: center;
            line-height: 48px;
        }
        .icon-box svg {
            vertical-align: middle;
            fill: #2563eb;
        }
        .grid-col h3 {
            font-size: 20px;
            color: #0f172a;
            margin: 0 0 14px 0;
            font-weight: 700;
        }
        .grid-col p {
            font-size: 14.5px;
            color: #475569;
            margin: 0;
            line-height: 1.6;
        }
        .content-block {
            background-color: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            padding: 36px;
            margin-bottom: 28px;
            transition: all 0.3s ease;
            box-shadow: 0 2px 4px rgba(0,0,0,0.01);
            display: table;
            width: 100%;
        }
        .content-block:hover {
            border-color: #cbd5e1;
            box-shadow: 0 12px 20px rgba(0,0,0,0.03);
        }
        .scene-icon {
            display: table-cell;
            width: 64px;
            vertical-align: top;
            padding-right: 20px;
        }
        .scene-icon-inner {
            width: 44px;
            height: 44px;
            background-color: #f0fdf4;
            border-radius: 50%;
            text-align: center;
            line-height: 44px;
        }
        .scene-icon-inner svg {
            vertical-align: middle;
            fill: #16a34a;
        }
        .scene-text {
            display: table-cell;
            vertical-align: top;
        }
        .content-block h3 {
            font-size: 20px;
            color: #0f172a;
            margin: 0 0 12px 0;
            font-weight: 700;
        }
        .content-block p {
            font-size: 15px;
            color: #475569;
            margin: 0;
            line-height: 1.65;
        }
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 24px;
            font-size: 14px;
            border-top: 1px solid #1e293b;
            margin-top: 100px;
        }
        .footer-layout {
            display: table;
            width: 100%;
        }
        .footer-left {
            display: table-cell;
            width: 60%;
            vertical-align: top;
        }
        .footer-right {
            display: table-cell;
            width: 40%;
            text-align: right;
            vertical-align: top;
        }
        .footer-left p {
            margin: 0 0 12px 0;
            line-height: 1.6;
        }
        .footer-right p {
            margin: 0 0 12px 0;
        }
        .footer-links {
            margin-top: 20px;
        }
        .footer-links a {
            color: #64748b;
            text-decoration: none;
            margin-left: 20px;
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: #cbd5e1;
        }
        @media (max-width: 768px) {
            .nav-container, .hero-layout, .grid-layout, .footer-layout, .content-block, .scene-icon, .scene-text {
                display: block;
                width: 100%;
            }
            .logo-box, .menu-box, .hero-text, .hero-image-slot, .grid-col, .footer-left, .footer-right {
                display: block;
                width: 100%;
                text-align: left;
                padding: 0;
            }
            .logo-box {
                padding-top: 16px;
            }
            .menu-box {
                padding: 16px 0;
            }
            .menu-box a {
                margin-left: 0;
                margin-right: 24px;
                display: inline-block;
                margin-bottom: 12px;
            }
            .github-btn {
                margin-left: 0;
                margin-top: 4px;
                display: inline-block;
            }
            .hero-text {
                padding-right: 0;
                margin-bottom: 40px;
            }
            .image-placeholder {
                height: 240px;
            }
            .image-placeholder span {
                padding-top: 105px;
            }
            .grid-layout {
                border-spacing: 0;
            }
            .grid-col {
                margin-bottom: 24px;
            }
            .scene-icon {
                padding-right: 0;
                margin-bottom: 16px;
            }
            .footer-right {
                margin-top: 32px;
            }
            .footer-links a {
                margin-left: 0;
                margin-right: 20px;
            }
        }