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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: #fff;
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

        /* Video nền + Overlay */
        .video-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
        }
        .background-video {
            width: 100%;
            height: 100%;
            object-fit: cover;
            pointer-events: none;
        }
        .overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.65);
            z-index: 1;
        }

        /* Logo trên cùng */
        .top-logo {
            width: 100%;
            text-align: center;
            padding: 0;
            margin: 0;
            background: transparent;
            z-index: 10;
            position: relative;
        }
        .top-logo img {
            width: 450px;
            height: auto;
            object-fit: contain;
            display: block;
            margin: 0 auto;
            max-width: 90%;
            padding: 20px 0;
        }

        .container { 
            max-width: 1500px; 
            margin: 0 auto; 
            padding: 40px 60px 80px;
            position: relative;
            z-index: 2;
            width: 100%;
            overflow-x: hidden;
        }

        .section-title {
            text-align: center;
            font-size: 2.8rem;
            margin-bottom: 10px;
            color: #ffd700;
            text-shadow: 0 2px 10px rgba(0,0,0,0.8);
        }
        .section-subtitle {
            text-align: center;
            font-size: 1.3rem;
            color: #eee;
            margin-bottom: 60px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.7);
        }

        .services {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            width: 100%;
            max-width: 100%;
            margin: 0 auto;
        }
        
        .service-card:nth-child(1) {
            grid-column: auto;
        }
        .service-card:nth-child(2) {
            grid-column: auto;
        }
        .service-card:nth-child(3) {
            grid-column: auto;
        }
        .service-card:nth-child(4) {
            grid-column: auto;
        }

        .service-card {
            background: rgba(255,255,255,0.08);
            border-radius: 24px;
            padding: 40px 20px 50px;
            text-align: center;
            transition: all 0.4s ease;
            backdrop-filter: blur(8px);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 100%;
        }
        .circle-wrapper {
            width: 280px;
            height: 280px;
            margin: 0 auto 40px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            background: radial-gradient(circle, rgba(60,60,60,0.8) 0%, rgba(40,40,40,0.9) 100%);
            border-radius: 50%;
            box-shadow: 
                0 0 50px rgba(0,0,0,0.9),
                inset 0 0 50px rgba(0,0,0,0.7);
            perspective: 1000px;
            transition: transform 0.6s linear;
            z-index: 1;
        }
        .circle-wrapper::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            border-radius: 50%;
            border: 10px solid transparent;
            border-top-color: #ffd700;
            border-right-color: #ffd700;
            top: 0;
            left: 0;
            box-shadow: inset 0 0 30px rgba(255,215,0,0.4);
            pointer-events: none;
            z-index: 0;
        }
        .circle-wrapper svg {
            display: none;
        }
        .circle-bg {
            fill: none;
            stroke: rgba(255,255,255,0.12);
            stroke-width: 14;
        }
        .circle-progress {
            fill: none;
            stroke: #ffd700;
            stroke-width: 14;
            stroke-linecap: round;
            stroke-dasharray: 440;
            stroke-dashoffset: 0;
        }
        @keyframes spinCircle {
            from { stroke-dashoffset: 440; }
            to   { stroke-dashoffset: 0; }
        }
        @keyframes rotateLogo {
            from { transform: rotateY(0deg); }
            to { transform: rotateY(360deg); }
        }

        .logo-center {
            width: 220px;
            height: 220px;
            min-width: 220px;
            min-height: 220px;
            max-width: 220px;
            max-height: 220px;
            object-fit: contain;
            aspect-ratio: 1 / 1;
            transition: transform 0.3s ease;
            filter: drop-shadow(0 0 15px rgba(255,215,0,0.5));
            margin: 0;
            flex-shrink: 0;
            padding: 0;
            display: block;
            position: relative;
            z-index: 2;
        }
        .service-card:hover .logo-center {
            transform: none;
        }

        /* Nút */
        .btn-experience {
            display: inline-block;
            margin-top: 20px;
            padding: 14px 32px;
            background: linear-gradient(90deg, #ffd700, #ffaa00);
            color: #1a0033;
            font-weight: bold;
            font-size: 1.05rem;
            border-radius: 50px;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
        }
        .btn-experience:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255, 215, 0, 0.7);
        }

        .service-card h3 {
            font-size: 1.8rem;
            margin-bottom: 25px;
            color: #ffd700;
            min-height: 54px;
            text-shadow: 0 2px 6px rgba(0,0,0,0.7);
        }

        /* Desktop - Luôn 4 cột nằm ngang, căn giữa */
        @media (min-width: 1201px) {
            .services {
                grid-template-columns: repeat(4, 1fr);
                max-width: 1400px;
            }
        }

        /* Tablet - 2 cột */
        @media (max-width: 1200px) {
            .services { 
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }
            .container {
                padding: 30px 40px 60px;
            }
            .section-title {
                font-size: 2.2rem;
            }
            .circle-wrapper {
                width: 240px;
                height: 240px;
            }
            .logo-center {
                width: 160px;
                height: 160px;
                min-width: 160px;
                min-height: 160px;
                max-width: 160px;
                max-height: 160px;
            }
            .service-card {
                padding: 40px 20px 50px;
            }
            .service-card h3 {
                font-size: 1.5rem;
            }
        

        /* Responsive - Tablet */
        @media (max-width: 768px) {
            .top-logo img { 
                width: 80%;
                max-width: 340px;
            }
            .services { 
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .container {
                padding: 25px 20px 50px;
            }
            .section-title {
                font-size: 1.8rem;
                margin-bottom: 8px;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 40px;
            }
            .circle-wrapper {
                width: 200px;
                height: 200px;
                margin: 0 auto 30px;
            }
            .logo-center {
                width: 160px;
                height: 160px;
                min-width: 160px;
                min-height: 160px;
                max-width: 160px;
                max-height: 160px;
            }
            .service-card {
                padding: 30px 15px 40px;
                border-radius: 16px;
            }
            .service-card h3 {
                font-size: 1.2rem;
                min-height: 40px;
                margin-bottom: 15px;
            }
            .btn-experience {
                padding: 12px 24px;
                font-size: 0.95rem;
                margin-top: 15px;
            }
        }

        /* Responsive - Mobile */
        @media (max-width: 480px) {
            .top-logo img { 
                width: 85%;
                max-width: 280px;
            }
            .services { 
                grid-template-columns: 1fr;
                gap: 25px;
            }
            .container {
                padding: 20px 15px 40px;
                max-width: 100%;
            }
            .section-title {
                font-size: 1.5rem;
                margin-bottom: 5px;
            }
            .section-subtitle {
                font-size: 0.9rem;
                margin-bottom: 30px;
            }
            .circle-wrapper {
                width: 170px;
                height: 170px;
                margin: 0 auto 25px;
            }
            .logo-center {
                width: 140px;
                height: 140px;
                min-width: 140px;
                min-height: 140px;
                max-width: 140px;
                max-height: 140px;
                filter: drop-shadow(0 0 10px rgba(255,215,0,0.4));
            }
            .service-card {
                padding: 25px 12px 35px;
                border-radius: 12px;
            }
            .service-card h3 {
                font-size: 1rem;
                min-height: auto;
                margin-bottom: 12px;
            }
            .btn-experience {
                padding: 10px 20px;
                font-size: 0.9rem;
                margin-top: 12px;
            }
        }

        /* Responsive - Small Mobile */
        @media (max-width: 360px) {
            .top-logo img { 
                width: 90%;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .circle-wrapper {
                width: 150px;
                height: 150px;
            }
            .logo-center {
                width: 120px;
                height: 120px;
                min-width: 120px;
                min-height: 120px;
                max-width: 120px;
                max-height: 120px;
            }
        }
        }