* {
            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;
            width: 100%;
        }

        /* 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: 95%;
        }

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

        .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);
            text-transform: uppercase;
        }

        .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%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            background: rgba(255, 215, 0, 0.12);
        }

        /* Vòng tròn */
        .circle-wrapper {
            width: 128px;
            height: 128px;
            margin: 0 auto 40px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            perspective: 1000px;
            transition: transform 0.6s linear;
        }
        .circle-wrapper::after {
            display: none;
        }
        .circle-wrapper svg {
            display: block;
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
        }
        .circle-bg {
            fill: none;
            stroke: rgba(255,255,255,0.1);
            stroke-width: 6;
        }
        .circle-progress {
            fill: none;
            stroke: #ffd700;
            stroke-width: 6;
            stroke-linecap: round;
            stroke-dasharray: 440;
            stroke-dashoffset: 440;
            animation: spinLoadingBar 2.5s linear infinite;
        }
        @keyframes spinLoadingBar {
            0% { 
                stroke-dashoffset: 440;
            }
            100% { 
                stroke-dashoffset: 0;
            }
        }
        @keyframes rotateLogo {
            from { transform: rotateY(0deg); }
            to { transform: rotateY(360deg); }
        }

        .logo-center {
            width: 88px;
            height: 88px;
            min-width: 88px;
            min-height: 88px;
            max-width: 88px;
            max-height: 88px;
            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;
            padding: 0;
            display: block;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            z-index: 1;
        }

        /* 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);
            min-height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            cursor: pointer;
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
        }
        .btn-experience:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255, 215, 0, 0.7);
        }
        .btn-experience:active {
            transform: translateY(-1px);
        }

        .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);
        }

        /* Responsive - Tablet và Desktop nhỏ */
        @media (max-width: 1200px) {
            .services { 
                grid-template-columns: repeat(2, 1fr);
                gap: 25px;
            }
            .container {
                padding: 30px 40px 60px;
            }
            .circle-wrapper {
                width: 112px;
                height: 112px;
            }
            .logo-center {
                width: 76px;
                height: 76px;
                min-width: 76px;
                min-height: 76px;
                max-width: 76px;
                max-height: 76px;
            }
            .service-card {
                padding: 30px 15px 40px;
            }
        }

        /* Responsive - Tablet */
        @media (max-width: 768px) {
            .top-logo img { 
                width: 90%;
                max-width: 300px;
            }
            .container {
                padding: 25px 20px 50px;
            }
            .section-title {
                font-size: 2rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 40px;
            }
            .services { 
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .circle-wrapper {
                width: 104px;
                height: 104px;
            }
            .logo-center {
                width: 68px;
                height: 68px;
                min-width: 68px;
                min-height: 68px;
                max-width: 68px;
                max-height: 68px;
            }
            .service-card {
                padding: 25px 15px 35px;
            }
            .service-card h3 {
                font-size: 1.3rem;
            }
            .btn-experience {
                padding: 12px 28px;
                font-size: 0.95rem;
                margin-top: 15px;
            }
        }

        /* Responsive - Mobile */
        @media (max-width: 480px) {
            .top-logo img { 
                width: 85%;
                max-width: 250px;
                padding-top: 15px;
            }
            .services { 
                grid-template-columns: 1fr;
                gap: 15px;
            }
            .container {
                padding: 15px 12px 30px;
            }
            .section-title {
                font-size: 1.4rem;
                margin-bottom: 8px;
            }
            .section-subtitle {
                font-size: 0.85rem;
                margin-bottom: 25px;
            }
            .circle-wrapper {
                width: 88px;
                height: 88px;
                margin: 0 auto 20px;
            }
            .logo-center {
                width: 68px;
                height: 68px;
                min-width: 68px;
                min-height: 68px;
                max-width: 68px;
                max-height: 68px;
            }
            .service-card {
                padding: 20px 10px 30px;
            }
            .service-card h3 {
                font-size: 0.95rem;
                min-height: auto;
                margin-bottom: 15px;
            }
            .btn-experience {
                padding: 10px 24px;
                font-size: 0.9rem;
                margin-top: 12px;
            }
        }

        /* Responsive - Small Mobile */
        @media (max-width: 360px) {
            .top-logo img { 
                width: 85%;
                max-width: 220px;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .section-subtitle {
                font-size: 0.8rem;
            }
            .circle-wrapper {
                width: 80px;
                height: 80px;
                margin: 0 auto 15px;
            }
            .logo-center {
                width: 52px;
                height: 52px;
                min-width: 52px;
                min-height: 52px;
                max-width: 52px;
                max-height: 52px;
            }
            .service-card {
                padding: 18px 8px 28px;
            }
            .service-card h3 {
                font-size: 0.85rem;
            }
        }