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

:root {
    --primary-color: #1a5cd9;
    --secondary-color: #0d3a8c;
    --accent-color: #ff6b35;
    --text-dark: #333;
    --text-light: #666;
    --bg-light: #f5f7fa;
    --white: #ffffff;
    --border-color: #e1e4e8;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-dark);
    background-color: var(--white);
}

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

.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-emoji {
    font-size: 36px;
}

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

.nav a {
    color: var(--white);
    text-decoration: none;
    font-size: 16px;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav a:hover {
    background-color: rgba(255,255,255,0.2);
}

.nav a.active {
    background-color: rgba(255,255,255,0.3);
}

.banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 100px;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
    position: relative;
}

.banner p {
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 40px;
    color: var(--text-dark);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    margin: 15px auto 0;
    border-radius: 2px;
}

.section-bg {
    background-color: var(--bg-light);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

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

.product-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
}

.product-content {
    padding: 25px;
}

.product-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.product-content p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.product-price {
    font-size: 24px;
    color: var(--accent-color);
    font-weight: bold;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

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

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

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

.news-list {
    max-width: 900px;
    margin: 0 auto;
}

.news-item {
    background: var(--white);
    padding: 25px;
    margin-bottom: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.news-item:hover {
    transform: translateX(5px);
}

.news-date {
    background: var(--primary-color);
    color: var(--white);
    padding: 10px 15px;
    border-radius: 8px;
    text-align: center;
    min-width: 80px;
}

.news-date .day {
    font-size: 24px;
    font-weight: bold;
    display: block;
}

.news-date .month {
    font-size: 12px;
}

.news-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.news-content h3 a {
    color: inherit;
    text-decoration: none;
}

.news-content h3 a:hover {
    color: var(--primary-color);
}

.news-content p {
    color: var(--text-light);
    line-height: 1.8;
}

.news-meta {
    margin-top: 10px;
    font-size: 14px;
    color: #999;
}

.tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 15px;
}

.tag {
    background: var(--bg-light);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    color: var(--primary-color);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-top: 40px;
}

.about-image {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 400px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 100px;
}

.about-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 2;
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.stat-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    color: var(--text-light);
    margin-top: 10px;
}

.contact-section {
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 40px;
}

.contact-info {
    padding: 40px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-text h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.contact-text p {
    color: var(--text-light);
}

.contact-form {
    padding: 40px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.contact-form h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-col p,
.footer-col a {
    color: rgba(255,255,255,0.8);
    line-height: 2;
    text-decoration: none;
    display: block;
}

.footer-col a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.2);
    color: rgba(255,255,255,0.6);
}

.breadcrumb {
    background: var(--bg-light);
    padding: 15px 0;
}

.breadcrumb-list {
    display: flex;
    gap: 10px;
    list-style: none;
}

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

.breadcrumb-list li a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb-list li:not(:last-child)::after {
    content: ' /';
    margin-left: 10px;
}

.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

.article-detail {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.article-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.article-header h1 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.article-meta {
    color: #999;
    font-size: 14px;
}

.article-content {
    line-height: 2;
    color: var(--text-light);
}

.article-content p {
    margin-bottom: 20px;
}

.article-content h2 {
    color: var(--text-dark);
    margin: 30px 0 20px;
    font-size: 24px;
}

.article-content ul {
    margin: 20px 0;
    padding-left: 30px;
}

.article-content li {
    margin-bottom: 10px;
}

.related-news {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.related-news h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.related-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.related-item {
    padding: 20px;
    background: var(--bg-light);
    border-radius: 8px;
    transition: background-color 0.3s;
}

.related-item:hover {
    background: #e8ecf1;
}

.related-item h4 {
    font-size: 16px;
    margin-bottom: 10px;
}

.related-item h4 a {
    color: var(--text-dark);
    text-decoration: none;
}

.related-item h4 a:hover {
    color: var(--primary-color);
}

.related-item span {
    font-size: 13px;
    color: #999;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.pagination a {
    padding: 10px 20px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-dark);
    text-decoration: none;
    transition: all 0.3s;
}

.pagination a:hover,
.pagination a.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 24px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .about-content,
    .contact-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .banner h1 {
        font-size: 32px;
    }

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

    .news-item {
        flex-direction: column;
    }

    .related-list {
        grid-template-columns: 1fr;
    }
}