:root {
    --primary-color: #ff4d6d;
    --secondary-color: #ff8fa3;
    --dark-color: #333;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    margin: 0;
    padding: 0;
    background-color: #fff;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Nav */
header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo img {
    height: 50px;
}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Search Box */
.search-section {
    background: #f1f1f1;
    padding: 10px 0;
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px 0 0 4px;
}

.search-box button {
    padding: 10px 20px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}

/* Banner */
.banner {
    background: url('../images/banner.jpg') no-repeat center center/cover;
    height: 500px;
    display: flex;
    align-items: center;
    color: #fff;
    text-align: center;
    position: relative;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
}

.banner-content {
    position: relative;
    z-index: 1;
    width: 100%;
}

.banner h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary-color);
    color: #fff;
    border-radius: 30px;
    font-weight: bold;
}

/* Sections */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--dark-color);
}

/* Video Cards */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.video-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    position: relative;
    cursor: pointer;
}

.video-thumb {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.5s;
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 50px;
    color: #fff;
    opacity: 0;
    transition: 0.3s;
}

.video-card:hover .play-btn {
    opacity: 1;
}

.video-card:hover .video-thumb img {
    transform: scale(1.1);
}

.video-info {
    padding: 20px;
}

/* FAQ */
.faq-item {
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.faq-q {
    font-weight: bold;
    cursor: pointer;
    color: var(--primary-color);
}

/* Footer */
footer {
    background: #333;
    color: #fff;
    padding: 50px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #444;
    padding-top: 20px;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .banner h1 {
        font-size: 2rem;
    }
}