/* Global Styles */
body {
    font-family: 'Microsoft YaHei', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: #333;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    z-index: 1000;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

/* Adjust main content to account for sticky header */
main {
    margin-top: 80px; /* Height of header + padding */
}

/* Hero Section with Carousel Background */
.hero {
    position: relative;
    height: 500px;
    overflow: hidden;
}

.hero .carousel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero .carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    padding-top: 150px;
}

/* Carousel Styles */
.carousel {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 2rem auto;
    overflow: hidden;
}

.carousel-inner {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel-item {
    min-width: 100%;
    box-sizing: border-box;
}

.carousel-item img {
    width: 100%;
    height: auto;
}

/* Video Container Styles */
.video-container {
    width: 100%;
    max-width: 800px;
    margin: 2rem auto;
}

/* Tabs Styles */
.tabs {
    display: flex;
    margin-bottom: 1rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    background: #f4f4f4;
    border: none;
    cursor: pointer;
}

.tab-btn.active {
    background: #2c3e50;
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Footer Styles */
footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}