* {
            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;
        }

        .container { 
            max-width: 1300px; 
            margin: 0 auto; 
            padding: 40px 20px 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);
        }

        .services {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .service-card {
            background: rgba(255,255,255,0.08);
            border-radius: 24px;
            padding: 40px 20px 45px;
            text-align: center;
            transition: all 0.4s ease;
            backdrop-filter: blur(8px);
        }
        .service-card:hover {
            transform: translateY(-10px);
            background: rgba(255, 215, 0, 0.12);
        }

        /* Vòng tròn */
        .circle-wrapper {
            width: 155px;
            height: 155px;
            margin: 0 auto 30px;
            position: relative;
        }
        .circle-wrapper svg {
            width: 100%;
            height: 100%;
            transform: rotate(-90deg);
        }
        .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;
            animation: spinCircle 1.8s linear infinite;
        }
        @keyframes spinCircle {
            from { stroke-dashoffset: 440; }
            to   { stroke-dashoffset: 0; }
        }

        .logo-center {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 98px;
            height: 98px;
            object-fit: contain;
        }

        /* 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: 1.45rem;
            margin-bottom: 20px;
            color: #ffd700;
            min-height: 44px;
            text-shadow: 0 2px 6px rgba(0,0,0,0.7);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .top-logo img { width: 340px; }
        }
        @media (max-width: 480px) {
            .top-logo img { width: 377px; }
        }
        @media (max-width: 1200px) {
            .services { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 600px) {
            .services { grid-template-columns: 1fr; }
        }
    `;