/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

/* Header */
header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #000;
}

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

nav ul li a {
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #ff4d4f;
}

.search-box {
    position: relative;
    margin-top: 10px;
    padding-bottom: 10px;
}

.search-box input {
    width: 100%;
    padding: 8px 15px;
    border: 1px solid #ddd;
    border-radius: 20px;
    outline: none;
}

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

.hero-content {
    background: rgba(0,0,0,0.4);
    padding: 40px;
    border-radius: 10px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: #ff4d4f;
    color: #fff;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn:hover {
    background: #e03e3f;
}

/* Section Titles */
.section-title {
    text-align: center;
    margin: 60px 0 40px;
}

.section-title h2 {
    font-size: 32px;
    margin-bottom: 10px;
}

.section-title p {
    color: #888;
}

/* Products */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.product-info .price {
    color: #ff4d4f;
    font-weight: bold;
    font-size: 20px;
}

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

.video-card {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
}

.video-card img {
    width: 100%;
    transition: transform 0.3s;
}

.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(255,255,255,0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

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

.play-btn::after {
    content: '';
    border-style: solid;
    border-width: 10px 0 10px 15px;
    border-color: transparent transparent transparent #000;
}

/* Reviews */
.review-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.review-card {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.review-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.review-header img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 10px;
}

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

.faq-item {
    background: #fff;
    margin-bottom: 10px;
    border-radius: 5px;
    overflow: hidden;
}

.faq-question {
    padding: 15px 20px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 20px 15px;
    display: none;
    color: #666;
}

/* Footer */
footer {
    background: #333;
    color: #fff;
    padding: 60px 0 20px;
    margin-top: 80px;
}

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

.footer-logo {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #444;
    padding-top: 20px;
    font-size: 14px;
    color: #aaa;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 32px; }
    nav ul { display: none; }
}