/* 轮播图Banner样式 - 大气醒目字体设计 */

/* Banner容器样式 */
.banner-section {
    position: relative;
    width: 100%;
    height: 450px;
    min-height: 450px;
    overflow: hidden;
}

.video-banner {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.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: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 2;
    width: 100%;
    max-width: 1200px;
    padding: 0 20px;
}

/* 主标题样式 - 超大醒目 */
.banner-title {
    font-size: 4.5rem;          /* 72px - 超大字体 */
    font-weight: 900;           /* 最粗字重 */
    line-height: 1.2;
    margin-bottom: 20px;
   
    letter-spacing: 0.05em;     /* 字间距 */
    text-transform: uppercase;   /* 大写 */
    color:#ffffff;
    
}

/* 副标题样式 - 大气优雅 */
.banner-subtitle {
    font-size: 4.5rem;
    line-height: 1.4;
    margin-bottom: 30px;
    
    letter-spacing: 0.08em;     /* 更大字间距 */
    color: #ffffff;
    opacity: 0.95;
    animation: subtitleFade 2s ease-in-out;
}

/* 标题发光动画 */
@keyframes titleGlow {
    0% {
        text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7), 0 0 20px rgba(255, 255, 255, 0.3);
    }
    100% {
        text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7), 0 0 30px rgba(255, 255, 255, 0.5);
    }
}

/* 副标题淡入动画 */
@keyframes subtitleFade {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 0.95;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .banner-title {
        font-size: 3.5rem;      /* 60px */
    }
    .banner-subtitle {
        font-size: 1.9rem;     /* 30px */
    }
}

@media (max-width: 992px) {
    .banner-title {
        font-size: 3.2rem;     /* 51px */
    }
    .banner-subtitle {
        font-size: 1.6rem;     /* 26px */
    }
}

@media (max-width: 768px) {
    .banner-section {
        height: 350px;
        min-height: 350px;
    }
    
    .banner-title {
        font-size: 2.5rem;     /* 40px */
        margin-bottom: 15px;
    }
    
    .banner-subtitle {
        font-size: 1.3rem;     /* 21px */
        margin-bottom: 20px;
        letter-spacing: 0.05em;
    }
}

@media (max-width: 480px) {
    .banner-title {
        font-size: 2rem;       /* 32px */
        letter-spacing: 0.02em;
    }
    
    .banner-subtitle {
        font-size: 1.1rem;     /* 18px */
        letter-spacing: 0.03em;
    }
    
    .banner-content {
        padding: 0 15px;
    }
}

/* 增强视觉效果 */
.banner-content::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, transparent, #ffffff, transparent);
    opacity: 0.8;
}

.banner-content::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, transparent, #ffffff, transparent);
    opacity: 0.8;
}