@charset "gb2312";
/* Banner 区域 */
.banner {
    position: relative;
    color: #fff;
    text-align: center;
    overflow: hidden;
}

.banner-video {
    display: block;
    width: 100%;
    height: auto;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.banner-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(60px);
    animation: fadeInUp 1s ease forwards;
    animation-delay: 0.3s;
}

.banner p {
    font-size: 20px;
    opacity: 0;
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.6;
    transform: translateY(60px);
    animation: fadeInUp 1s ease forwards;
    animation-delay: 0.6s;
}

.banner .btn-primary {
    opacity: 0;
    transform: translateY(60px);
    animation: fadeInUp 1s ease forwards;
    animation-delay: 0.9s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn-primary {
    display: inline-block;
    color: #fff;
    border: 1px solid #fff;
    padding: 20px 40px;
    font-size: 16px;
    font-weight: bold;
    transition: background-color 0.3s, color 0.3s;
}

.btn-primary:hover {
    background-color: #FFF;
    color: #333;
}

/* ===== 响应式断点 ===== */

/* xl: >= 1200px - 默认样式 */

/* lg: 992px - 1199px */
@media (max-width: 1199px) {

}

/* md: 768px - 991px */
@media (max-width: 991px) {
    .banner h1 {
        font-size: 36px;
    }

    .banner p {
        font-size: 18px;
    }
}

/* sm: 576px - 767px */
@media (max-width: 767px) {
    .banner h1 {
        font-size: 28px;
    }
}

/* xs: < 576px */
@media (max-width: 575px) {
    .banner h1 {
        font-size: 24px;
    }

    .banner p {
        font-size: 16px;
    }
	
	.btn-primary {
        padding: 12px 28px;
        font-size: 16px;
    }
}