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

body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: #f5f5f5;
}

.header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav {
    display: flex;
    justify-content: flex-end;
    gap: 40px;
}

.nav a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.nav a:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 100px 0;
    text-align: center;
    color: #fff;
    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;
    z-index: 1;
}

.banner p {
    font-size: 20px;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.section {
    padding: 80px 0;
    background: #fff;
    margin: 40px 0;
    border-radius: 10px;
    box-shadow: 0 5px 30px rgba(0,0,0,0.05);
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #1a1a2e;
    position: relative;
}

.section-title::after {
    content: "";
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 20px auto 0;
    border-radius: 2px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 0 20px;
}

.product-card {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    border: 1px solid #eee;
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
    border-color: #667eea;
}

.product-icon {
    font-size: 60px;
    margin-bottom: 20px;
}

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

.product-card p {
    color: #666;
    font-size: 14px;
}

.news-list {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.news-item {
    padding: 30px;
    background: #f9f9f9;
    border-radius: 10px;
    margin-bottom: 25px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

.news-item:hover {
    background: #f0f4ff;
    transform: translateX(10px);
}

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

.news-item .date {
    color: #999;
    font-size: 14px;
    margin-bottom: 15px;
}

.news-item p {
    color: #555;
    line-height: 1.8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    padding: 0 40px;
}

.feature-item {
    text-align: center;
    padding: 30px;
}

.feature-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

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

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

.contact-info {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 18px;
}

.contact-item .icon {
    font-size: 30px;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: left;
}

.about-content p {
    font-size: 18px;
    line-height: 2;
    color: #555;
    margin-bottom: 30px;
    text-indent: 2em;
}

.about-content h3 {
    font-size: 24px;
    color: #1a1a2e;
    margin: 40px 0 20px;
}

.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

.footer p {
    opacity: 0.8;
}

.footer a {
    color: #667eea;
    text-decoration: none;
}

.hero-content {
    padding: 80px 0;
    background: linear-gradient(180deg, #f5f7fa 0%, #fff 100%);
}

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

.hero-text h2 {
    font-size: 42px;
    color: #1a1a2e;
    margin-bottom: 30px;
    line-height: 1.3;
}

.hero-text p {
    font-size: 18px;
    color: #555;
    margin-bottom: 20px;
}

.hero-image {
    font-size: 150px;
    text-align: center;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-size: 18px;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.stats-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0;
    color: #fff;
}

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

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

.stat-item p {
    font-size: 18px;
    opacity: 0.9;
}

.testimonials {
    background: #f9f9f9;
    padding: 80px 0;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.testimonial-item {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.testimonial-item .emoji {
    font-size: 40px;
    margin-bottom: 15px;
}

.testimonial-item p {
    font-size: 16px;
    color: #555;
    line-height: 1.8;
    font-style: italic;
}

.testimonial-item .author {
    margin-top: 20px;
    font-weight: bold;
    color: #1a1a2e;
}

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

.cta-section h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 30px;
}

.cta-btn {
    display: inline-block;
    padding: 18px 50px;
    background: #fff;
    color: #1a1a2e;
    text-decoration: none;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s ease;
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255,255,255,0.2);
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 20px;
    }

    .nav {
        justify-content: center;
        flex-wrap: wrap;
        gap: 10px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-image {
        font-size: 100px;
    }

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

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