* {
    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 {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    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 — margin-top: auto để các nút cùng một hàng grid thẳng hàng đáy thẻ */
.btn-experience {
    display: inline-block;
    margin-top: auto;
    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: 0 0 12px;
    color: #ffd700;
    width: 100%;
    max-width: 100%;
    min-height: 3.6em;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.25;
    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;
    }
}