:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --text-color: #333;
    --bg-color: #F5F5F7;
    --white: #FFFFFF;
    --gray: #8E8E93;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

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

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

/* Header */
header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #E5E5E5;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 30px;
}

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

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

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

/* Hero Section */
.hero {
    height: 80vh;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
}

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

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

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

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 25px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn:hover {
    background: var(--secondary-color);
}

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

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

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

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

.product-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

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

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-info {
    padding: 20px;
}

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

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

.video-card img {
    width: 100%;
    display: block;
}

.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: none;
    align-items: center;
    justify-content: center;
}

.video-card:hover .play-btn {
    display: flex;
}

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

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

.user-info {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

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

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

.faq-item {
    background: var(--white);
    margin-bottom: 10px;
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    padding: 15px 20px;
    font-weight: bold;
    cursor: pointer;
    background: #F9F9F9;
}

.faq-answer {
    padding: 15px 20px;
    display: none;
}

/* Footer */
footer {
    background: #333;
    color: var(--white);
    padding: 60px 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;
    padding-top: 20px;
    border-top: 1px solid #444;
    font-size: 14px;
}

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