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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: #fff;
    letter-spacing: 2px;
}

.logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
    display: block;
}

.nav-link:hover {
    color: #00d4ff;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    min-width: 180px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    z-index: 1001;
}

.dropdown:hover > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(10px);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu li a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: #333;
    text-decoration: none;
    font-size: 0.95rem;
    transition: background 0.3s ease, color 0.3s ease;
}

.dropdown-menu li a:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.submenu {
    top: 0;
    left: 100%;
    transform: translateX(0);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}

.dropdown-menu > .dropdown:hover > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(10px);
}

.main {
    min-height: calc(100vh - 200px);
}

.product-section {
    padding: 4rem 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
}

.slider-container {
    max-width: 1200px;
    width: 100%;
    position: relative;
}

.slider {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.slide {
    display: none;
    padding: 4rem 3rem;
    animation: fadeIn 0.5s ease;
}

.slide.active {
    display: block;
}

.slide-tag {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.product-card {
    text-align: center;
}

.product-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.product-subtitle {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 2.5rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.product-images {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.image-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.image-placeholder {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    border: 2px solid #e0e0e0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
    padding: 0;
}

.image-placeholder:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.image-placeholder svg {
    width: 80px;
    height: 80px;
}

.image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: fill;
    border-radius: 10px;
}

.image-label {
    font-size: 1rem;
    color: #333;
    font-weight: 500;
    text-align: center;
}

.product-specs {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
}

.spec-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    color: #fff;
    min-width: 200px;
}

.spec-label {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.spec-value {
    font-size: 1.3rem;
    font-weight: 600;
}

.slider-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 2rem;
}

.slider-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.slider-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.slider-btn:active {
    transform: scale(0.95);
}

.slider-dots {
    display: flex;
    gap: 1rem;
}

.dot {
    width: 80px;
    height: 30px;
    border-radius: 3px;
    border: 2px solid transparent;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding-bottom: 5px;
    font-size: 0.85rem;
    font-weight: 500;
    color: #667eea;
    position: relative;
}

.dot::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: transparent;
    border-radius: 3px;
    transition: background 0.3s ease;
}

.dot.active::before,
.dot:hover::before {
    background: #667eea;
}

.dot.active {
    color: #667eea;
}

.dot:hover {
    color: #667eea;
}

.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-info p {
    margin: 0.5rem 0;
    font-size: 0.9rem;
    color: #aaa;
}

@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.1);
        min-width: 100%;
        margin-top: 0.5rem;
        display: none;
    }

    .dropdown:hover > .dropdown-menu {
        transform: none;
        display: block;
    }

    .dropdown-menu li a {
        color: #fff;
        padding: 0.5rem 1rem;
        text-align: center;
    }

    .dropdown-menu li a:hover {
        background: rgba(255, 255, 255, 0.2);
    }

    .submenu {
        position: static;
        transform: none;
        opacity: 0;
        visibility: hidden;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.15);
        margin-top: 0.5rem;
        margin-left: 1rem;
    }

    .dropdown-menu > .dropdown:hover > .submenu {
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .product-title {
        font-size: 1.8rem;
    }

    .product-subtitle {
        font-size: 1rem;
    }

    .product-specs {
        flex-direction: column;
        gap: 1rem;
    }

    .spec-item {
        min-width: 100%;
    }

    .slide {
        padding: 2rem 1.5rem;
    }

    .slider-controls {
        gap: 1rem;
    }

    .slider-btn {
        width: 40px;
        height: 40px;
    }

    .product-images {
        gap: 1.5rem;
    }

    .image-placeholder {
        width: 150px;
        height: 150px;
    }

    .image-placeholder svg {
        width: 60px;
        height: 60px;
    }

    .image-label {
        font-size: 0.9rem;
    }
}