:root {
    --primary-color: #d4af37;
    --text-color: #333;
    --bg-color: #fff;
    --gray-light: #f9f9f9;
    --spacing: 80px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Header */
header {
    padding: 20px 0;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
}

nav ul {
    display: flex;
    gap: 30px;
}

nav ul li a {
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--primary-color);
}

/* Search Box */
.search-container {
    padding: 15px 0;
    background: #f4f4f4;
    text-align: center;
}

.search-box {
    width: 300px;
    padding: 8px 15px;
    border: 1px solid #ddd;
    border-radius: 20px;
    outline: none;
}

/* Banner */
.banner {
    height: 80vh;
    background: url('../images/banner.jpg') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    position: relative;
}

.banner::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

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

.banner h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.banner p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Sections */
section {
    padding: var(--spacing) 0;
}

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

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    width: 50px;
    height: 2px;
    background: var(--primary-color);
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

.section-title p {
    color: #888;
    font-size: 1rem;
}

/* Video Cards */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.video-card {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    cursor: pointer;
}

.video-card img {
    width: 100%;
    display: block;
    transition: transform 0.5s;
}

.video-card:hover img {
    transform: scale(1.05);
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(212, 175, 55, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.play-btn::after {
    content: '';
    border-style: solid;
    border-width: 10px 0 10px 15px;
    border-color: transparent transparent transparent #fff;
    margin-left: 5px;
}

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

.video-info {
    padding: 20px;
    background: #fff;
}

.video-info h3 {
    margin-bottom: 10px;
}

.video-stats {
    font-size: 0.9rem;
    color: #666;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 15px;
}

.faq-item h4 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Reviews */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.review-card {
    background: var(--gray-light);
    padding: 30px;
    border-radius: 8px;
    font-style: italic;
}

.review-user {
    margin-top: 15px;
    font-weight: bold;
    font-style: normal;
    color: var(--primary-color);
}

/* Footer */
footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-col h4 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    font-size: 0.9rem;
    color: #888;
}

/* Responsive */
@media (max-width: 768px) {
    .banner h1 { font-size: 2.5rem; }
    nav ul { display: none; }
}