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

:root {
    --primary-color: #0066CC;
    --primary-dark: #0052A3;
    --secondary-color: #FFFFFF;
    --accent-gray: #F5F5F5;
    --accent-blue: #E6F3FF;
    --text-dark: #333333;
    --text-medium: #666666;
    --text-light: #999999;
    --border-color: #DDDDDD;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--secondary-color);
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ===== Container ===== */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 40px;
}

@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
}

/* ===== Header & Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--secondary-color);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 60px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    flex-shrink: 0;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

/* ===== Dropdown Menu ===== */
.nav-item {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-item > .nav-link {
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    padding: 8px 0;
}

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

.dropdown-link {
    display: block;
    padding: 12px 20px;
    color: var(--text-dark);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

.dropdown-link:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

/* Mobile Dropdown Support */
@media (max-width: 768px) {
    .nav-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .dropdown-menu {
        position: static;
        left: 0;
        transform: none;
        box-shadow: none;
        border: none;
        border-radius: 0;
        padding-left: 20px;
        max-height: 0;
        overflow: hidden;
        opacity: 1;
        visibility: visible;
        width: 100%;
        min-width: auto;
    }

    .nav-item:hover .dropdown-menu,
    .nav-item.active .dropdown-menu {
        max-height: 300px;
    }

    .dropdown-link {
        padding: 12px 20px;
    }
}

.contact-icons {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--accent-gray);
    color: var(--primary-color);
    transition: var(--transition);
    text-decoration: none;
    font-size: 16px;
}

.contact-icon:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 28px;
    height: 2px;
    background-color: var(--text-dark);
    transition: var(--transition);
}

@media (max-width: 1024px) {
    .header-left {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: flex;
    }

    .header-left {
        gap: 0;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background-color: var(--secondary-color);
        border-top: 1px solid var(--border-color);
        max-height: 0;
        overflow: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        max-height: 400px;
    }

    .nav-link {
        padding: 15px 40px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-link::after {
        display: none;
    }

    .contact-icons {
        display: none;
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    border-radius: 6px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

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

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

.btn-white:hover {
    background-color: var(--accent-gray);
    color: var(--primary-dark);
}

/* ===== Section Styles ===== */
.section {
    padding: 60px 0;
}

.section-gray {
    background-color: var(--accent-gray);
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
    text-align: center;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-medium);
    max-width: 800px;
    margin: 0 auto 40px;
    text-align: center;
}

@media (max-width: 768px) {
    .section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 16px;
    }
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    margin-top: 80px;
    padding: 20px 0;
}

.breadcrumb-list {
    display: flex;
    gap: 8px;
    font-size: 14px;
    color: var(--text-medium);
}

.breadcrumb-item a {
    color: var(--primary-color);
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-separator {
    color: var(--text-light);
}

.breadcrumb-item.current {
    color: var(--text-medium);
}

@media (max-width: 768px) {
    .breadcrumb {
        margin-top: 80px;
    }
}

/* ===== Footer ===== */
.footer {
    background-color: #1a1a1a;
    color: #ffffff;
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-about p {
    font-size: 14px;
    color: #a0a0a0;
    margin-bottom: 20px;
    line-height: 1.8;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-logo img {
    height: 40px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-4px);
}

.footer-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link {
    font-size: 14px;
    color: #a0a0a0;
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--primary-color);
    padding-left: 8px;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-contact-item i {
    color: var(--primary-color);
    margin-top: 4px;
}

.footer-contact-text {
    font-size: 14px;
    color: #a0a0a0;
    line-height: 1.6;
}

.footer-qr {
    margin-top: 20px;
    text-align: center;
}

.footer-qr img {
    width: 120px;
    height: auto;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.05);
    padding: 8px;
    transition: var(--transition);
}

.footer-qr img:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.footer-qr-caption {
    display: block;
    font-size: 12px;
    color: #888;
    margin-top: 8px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-copyright {
    font-size: 14px;
    color: #666666;
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Common Components ===== */

/* Page Header Banner */
.page-header {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: 80px 0;
    color: var(--secondary-color);
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.85), rgba(0, 82, 163, 0.85));
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--secondary-color);
}

.page-subtitle {
    font-size: 18px;
    color: var(--secondary-color);
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .page-header {
        padding: 60px 0;
    }
    .page-title {
        font-size: 32px;
    }
    .page-subtitle {
        font-size: 16px;
    }
}

/* Product Card */
.product-card {
    background-color: var(--secondary-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    width: 100%;
    padding-top: 100%;
    overflow: hidden;
    background-color: var(--accent-gray);
}

.product-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-image .primary-image {
    transition: opacity 0.4s ease;
}

.product-image .hover-image {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.product-card:hover .product-image .primary-image {
    opacity: 0;
}

.product-card:hover .product-image .hover-image {
    opacity: 1;
}

.product-info {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-category {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.product-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
    line-height: 1.4;
}

.product-description {
    font-size: 14px;
    color: var(--text-medium);
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.product-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
}

.product-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-link:hover {
    gap: 10px;
}

/* News Card */
.news-card {
    background-color: var(--secondary-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.news-image {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    overflow: hidden;
    background-color: var(--accent-gray);
}

.news-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.08);
}

.news-category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border-radius: 4px;
    text-transform: uppercase;
    z-index: 1;
}

.news-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.news-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
    line-height: 1.4;
    flex: 1;
}

.news-title a:hover {
    color: var(--primary-color);
}

.news-excerpt {
    font-size: 14px;
    color: var(--text-medium);
    margin-bottom: 16px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
}

.news-link:hover {
    gap: 10px;
}

/* Feature Card */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .features-grid { grid-template-columns: 1fr; }
}

.feature-card {
    text-align: center;
    padding: 30px;
    background-color: var(--secondary-color);
    border-radius: 12px;
    transition: var(--transition);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--secondary-color);
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-description {
    font-size: 14px;
    color: var(--text-medium);
    line-height: 1.6;
}

/* Category Card */
.category-card {
    background-color: var(--secondary-color);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.category-icon {
    position: relative;
    width: 100%;
    height: 200px;
    margin: 0 auto 24px;
    background-color: var(--accent-gray);
    border-radius: 8px;
    overflow: hidden;
}

.category-icon img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.category-icon .primary-image {
    transition: opacity 0.4s ease;
}

.category-icon .hover-image {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.category-card:hover .category-icon .primary-image {
    opacity: 0;
}

.category-card:hover .category-icon .hover-image {
    opacity: 1;
}

.category-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.category-description {
    font-size: 16px;
    color: var(--text-medium);
    margin-bottom: 24px;
}

.category-link {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.category-link:hover {
    gap: 12px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 50px;
}

.pagination-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background-color: var(--secondary-color);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    font-weight: 500;
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination-btn.active {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border-color: var(--primary-color);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Contact QR Popup */
.contact-icon-wrapper {
    position: relative;
}

.contact-icon-qr {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: white;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1001;
    pointer-events: none;
    width: 160px;
    height: 160px;
}

.contact-icon-qr::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-bottom-color: white;
}

.contact-icon-qr img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.contact-icon-wrapper:hover .contact-icon-qr,
.contact-icon-wrapper.active .contact-icon-qr {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}