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

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

a {
    text-decoration: none;
    color: #0066cc;
}

a:hover {
    color: #004499;
}

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

.header {
    background: linear-gradient(135deg, #1a237e 0%, #283593 50%, #303f9f 100%);
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #fff;
    display: flex;
    align-items: center;
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(145deg, #ffd700, #ffb300);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-size: 24px;
}

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

.nav a {
    color: #fff;
    font-size: 16px;
    padding: 10px 15px;
    transition: all 0.3s;
    border-radius: 4px;
}

.nav a:hover {
    background: rgba(255,255,255,0.1);
    color: #ffd700;
}

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

.btn {
    padding: 12px 28px;
    border-radius: 5px;
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-block;
    text-align: center;
}

.btn-register {
    background: linear-gradient(145deg, #ffd700, #ffb300);
    color: #1a237e;
    border: none;
}

.btn-register:hover {
    background: linear-gradient(145deg, #ffea00, #ffc400);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255,215,0,0.4);
}

.btn-download {
    background: transparent;
    color: #fff;
    border: 2px solid #ffd700;
}

.btn-download:hover {
    background: #ffd700;
    color: #1a237e;
}

.banner {
    background: linear-gradient(135deg, #1a237e 0%, #0d47a1 50%, #1565c0 100%);
    padding: 80px 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;base64,PHN2ZyB3aWR0aD0iMTAwIiBoZWlnaHQ9IjEwMCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48cGF0aCBkPSJNMCAwaDEwMHYxMDBIMHoiIGZpbGw9IiNmZmYiIGZpbGwtb3BhY2l0eT0iMC4wNSIvPjwvc3ZnPg==');
    pointer-events: none;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.banner p {
    font-size: 20px;
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
    opacity: 0.9;
}

.banner-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
    position: relative;
    z-index: 1;
}

.main-content {
    padding: 60px 0;
    background: #fff;
}

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

.section-title h2 {
    font-size: 36px;
    color: #1a237e;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #ffd700, #ffb300);
}

.section-title p {
    font-size: 18px;
    color: #666;
    max-width: 700px;
    margin: 0 auto;
}

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

.feature-item {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(145deg, #f8f9fa, #fff);
    border-radius: 10px;
    border: 1px solid #e0e0e0;
    transition: all 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-color: #ffd700;
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(145deg, #1a237e, #303f9f);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
}

.feature-item h3 {
    font-size: 20px;
    color: #1a237e;
    margin-bottom: 10px;
}

.feature-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
    padding: 50px;
    border-radius: 15px;
    margin-bottom: 60px;
}

.stat-item {
    text-align: center;
    color: #fff;
}

.stat-number {
    font-size: 42px;
    font-weight: bold;
    color: #ffd700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

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

.product-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    border-color: #ffd700;
}

.product-img {
    height: 200px;
    background: linear-gradient(135deg, #1a237e, #303f9f);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: #ffd700;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 20px;
    color: #1a237e;
    margin-bottom: 10px;
}

.product-info p {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
    line-height: 1.8;
}

.product-info .btn {
    width: 100%;
}

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

.about-img {
    background: linear-gradient(135deg, #1a237e, #303f9f);
    height: 400px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 100px;
    color: #ffd700;
}

.about-content h3 {
    font-size: 28px;
    color: #1a237e;
    margin-bottom: 20px;
}

.about-content p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-list {
    list-style: none;
}

.about-list li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    font-size: 16px;
    color: #666;
}

.about-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #ffd700;
    font-weight: bold;
    font-size: 18px;
}

.contact-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    background: linear-gradient(145deg, #f8f9fa, #fff);
    padding: 40px;
    border-radius: 10px;
    border: 1px solid #e0e0e0;
}

.contact-info h3 {
    font-size: 24px;
    color: #1a237e;
    margin-bottom: 25px;
}

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

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(145deg, #1a237e, #303f9f);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-size: 20px;
    color: #ffd700;
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 16px;
    color: #1a237e;
    margin-bottom: 5px;
}

.contact-text p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    border: 1px solid #e0e0e0;
}

.contact-form h3 {
    font-size: 24px;
    color: #1a237e;
    margin-bottom: 25px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    color: #333;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1a237e;
}

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

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

.news-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    border-color: #ffd700;
}

.news-img {
    height: 200px;
    background: linear-gradient(135deg, #1a237e, #303f9f);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 50px;
    color: #ffd700;
    position: relative;
}

.news-date {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
}

.news-content {
    padding: 25px;
}

.news-content h3 {
    font-size: 18px;
    color: #1a237e;
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-content p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 15px;
}

.news-meta {
    font-size: 12px;
    color: #999;
    display: flex;
    justify-content: space-between;
}

.news-detail {
    background: #fff;
    padding: 50px;
    border-radius: 10px;
    border: 1px solid #e0e0e0;
}

.breadcrumb {
    padding: 15px 0;
    margin-bottom: 30px;
    border-bottom: 1px solid #e0e0e0;
    font-size: 14px;
    color: #666;
}

.breadcrumb a {
    color: #1a237e;
}

.breadcrumb span {
    margin: 0 10px;
    color: #999;
}

.news-detail h1 {
    font-size: 32px;
    color: #1a237e;
    margin-bottom: 20px;
    line-height: 1.4;
}

.news-detail .news-meta {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e0e0e0;
}

.news-detail-content {
    font-size: 16px;
    line-height: 2;
    color: #333;
}

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

.news-detail-content h2 {
    font-size: 24px;
    color: #1a237e;
    margin: 30px 0 20px;
}

.advantages {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    padding: 25px;
    background: linear-gradient(145deg, #f8f9fa, #fff);
    border-radius: 10px;
    border: 1px solid #e0e0e0;
}

.advantage-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(145deg, #ffd700, #ffb300);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    font-size: 24px;
    flex-shrink: 0;
}

.advantage-text h4 {
    font-size: 18px;
    color: #1a237e;
    margin-bottom: 10px;
}

.advantage-text p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

.footer {
    background: #1a237e;
    color: #fff;
    padding: 50px 0 20px;
}

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

.footer-about h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #ffd700;
}

.footer-about p {
    font-size: 14px;
    line-height: 1.8;
    opacity: 0.8;
}

.footer-title {
    font-size: 18px;
    margin-bottom: 20px;
    color: #ffd700;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #fff;
    opacity: 0.8;
    font-size: 14px;
    transition: all 0.3s;
}

.footer-links a:hover {
    opacity: 1;
    color: #ffd700;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
    opacity: 0.7;
}

.mobile-btns {
    display: none;
}

@media (max-width: 992px) {
    .header-inner {
        flex-wrap: wrap;
    }
    
    .nav {
        order: 3;
        width: 100%;
        margin-top: 20px;
        justify-content: center;
    }
    
    .features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-section {
        grid-template-columns: 1fr;
    }
    
    .contact-section {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mobile-btns {
        display: flex;
        gap: 10px;
    }
    
    .mobile-btns .btn {
        padding: 10px 15px;
        font-size: 13px;
    }
    
    .header-btn {
        display: none;
    }
}

@media (max-width: 768px) {
    .banner h1 {
        font-size: 32px;
    }
    
    .banner p {
        font-size: 16px;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .banner-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .advantages {
        grid-template-columns: 1fr;
    }
    
    .news-detail {
        padding: 25px;
    }
    
    .news-detail h1 {
        font-size: 24px;
    }
}

.mobile-fixed-btns {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    flex-direction: column;
    gap: 10px;
}

.mobile-fixed-btns .btn {
    padding: 15px 25px;
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

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

@media (min-width: 769px) {
    .mobile-fixed-btns {
        display: none;
    }
}