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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

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

ul {
    list-style: none;
}

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

.header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #fff;
}

.logo span {
    color: #00d4ff;
}

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

.nav a {
    color: #fff;
    font-size: 16px;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.nav a:hover {
    background: rgba(0, 212, 255, 0.2);
    color: #00d4ff;
}

.nav a.active {
    background: rgba(0, 212, 255, 0.3);
    color: #00d4ff;
}

.header-btns {
    display: flex;
    gap: 15px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #f7931a 0%, #e67e00 100%);
    color: #fff;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(247, 147, 26, 0.4);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
}

.banner {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 140px 0 80px;
    margin-top: 70px;
    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="1" fill="rgba(0,212,255,0.1)"/></svg>');
    background-size: 50px 50px;
}

.banner-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff 0%, #00d4ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.banner-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 36px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.section-title p {
    color: #666;
    font-size: 18px;
}

.features {
    background: #fff;
}

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

.feature-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: #00d4ff;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #00d4ff 0%, #0f3460 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 36px;
    color: #fff;
}

.feature-card h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
    font-size: 15px;
    line-height: 1.8;
}

.stats {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item h3 {
    font-size: 48px;
    color: #00d4ff;
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
}

.products-section {
    background: #f8f9fa;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.product-img {
    height: 200px;
    background: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: #00d4ff;
}

.product-content {
    padding: 25px;
}

.product-content h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.product-content p {
    color: #666;
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.news-section {
    background: #fff;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.news-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.news-img {
    height: 180px;
    background: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 50px;
    color: #00d4ff;
}

.news-content {
    padding: 25px;
}

.news-date {
    font-size: 14px;
    color: #00d4ff;
    margin-bottom: 10px;
}

.news-content h3 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-content h3 a:hover {
    color: #00d4ff;
}

.news-content p {
    color: #666;
    font-size: 15px;
    line-height: 1.8;
}

.about-section {
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    color: #1a1a2e;
    margin-bottom: 25px;
}

.about-text p {
    color: #666;
    font-size: 16px;
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-img {
    background: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
    height: 400px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 100px;
    color: #00d4ff;
}

.breadcrumb {
    background: #fff;
    padding: 15px 0;
    margin-top: 70px;
    border-bottom: 1px solid #eee;
}

.breadcrumb ul {
    display: flex;
    gap: 10px;
    align-items: center;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #666;
}

.breadcrumb li::after {
    content: '/';
    color: #ccc;
}

.breadcrumb li:last-child::after {
    display: none;
}

.breadcrumb a {
    color: #00d4ff;
}

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

.page-banner {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

.page-banner h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-banner p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
}

.content-section {
    padding: 60px 0;
}

.content-wrapper {
    background: #fff;
    padding: 50px;
    border-radius: 15px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.05);
}

.content-wrapper h2 {
    font-size: 28px;
    color: #1a1a2e;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #00d4ff;
}

.content-wrapper h3 {
    font-size: 24px;
    color: #1a1a2e;
    margin: 30px 0 15px;
}

.content-wrapper p {
    color: #666;
    font-size: 16px;
    line-height: 1.9;
    margin-bottom: 20px;
}

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

.content-wrapper li {
    color: #666;
    font-size: 16px;
    line-height: 2;
    position: relative;
    padding-left: 20px;
}

.content-wrapper li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #00d4ff;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 15px;
    color: #333;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #00d4ff;
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.contact-item {
    text-align: center;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 15px;
}

.contact-item-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #00d4ff 0%, #0f3460 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: #fff;
}

.contact-item h3 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.contact-item p {
    color: #666;
    font-size: 15px;
}

.news-list {
    display: grid;
    gap: 30px;
}

.news-item {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 30px;
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid #eee;
}

.news-item:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.news-item-img {
    height: 180px;
    background: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 50px;
    color: #00d4ff;
}

.news-item-content {
    padding: 25px 25px 25px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-item-date {
    font-size: 14px;
    color: #00d4ff;
    margin-bottom: 10px;
}

.news-item-content h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.news-item-content h3 a:hover {
    color: #00d4ff;
}

.news-item-content p {
    color: #666;
    font-size: 15px;
    line-height: 1.8;
}

.news-detail-content {
    max-width: 800px;
    margin: 0 auto;
}

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

.news-detail-header h1 {
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

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

.news-detail-body {
    font-size: 16px;
    line-height: 2;
    color: #666;
}

.news-detail-body p {
    margin-bottom: 25px;
}

.news-detail-body h2 {
    font-size: 24px;
    color: #1a1a2e;
    margin: 35px 0 20px;
}

.news-detail-body ul {
    margin: 20px 0;
    padding-left: 20px;
}

.news-detail-body li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
}

.news-detail-body li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: #00d4ff;
}

.footer {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.footer-brand h3 span {
    color: #00d4ff;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-links h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #00d4ff;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #00d4ff;
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

.fixed-btns {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.fixed-btns .btn {
    padding: 15px 30px;
    font-size: 16px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

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

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

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

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

@media (max-width: 768px) {
    .header .container {
        flex-wrap: wrap;
    }

    .nav {
        display: none;
        width: 100%;
        order: 3;
        margin-top: 15px;
    }

    .nav.active {
        display: block;
    }

    .nav ul {
        flex-direction: column;
        gap: 10px;
    }

    .nav a {
        display: block;
        padding: 12px 15px;
    }

    .header-btns {
        display: none;
    }

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

    .banner {
        padding: 120px 0 60px;
    }

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

    .banner p {
        font-size: 16px;
    }

    .section {
        padding: 50px 0;
    }

    .section-title h2 {
        font-size: 28px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stat-item h3 {
        font-size: 36px;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .news-item {
        grid-template-columns: 1fr;
    }

    .news-item-img {
        height: 200px;
    }

    .news-item-content {
        padding: 25px;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .content-wrapper {
        padding: 30px 20px;
    }

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

    .fixed-btns {
        bottom: 20px;
        right: 20px;
        left: 20px;
        flex-direction: row;
        justify-content: center;
    }

    .fixed-btns .btn {
        flex: 1;
        text-align: center;
        padding: 12px 20px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 22px;
    }

    .banner h1 {
        font-size: 26px;
    }

    .banner-btns {
        flex-direction: column;
        align-items: center;
    }

    .banner-btns .btn {
        width: 100%;
        text-align: center;
    }
}