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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(26, 35, 126, 0.95);
    padding: 1rem 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: 0.5rem 0;
    background: rgba(26, 35, 126, 0.98);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

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

.nav-brand h1 {
    color: #ffd700;
    font-size: 1.8rem;
    margin: 0;
}

.nav-brand .tagline {
    color: white;
    font-size: 0.8rem;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #ffd700;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #ffd700;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero 区域 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-overlay {
    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 1440 320"><path fill="%23ffd700" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,165.3C1248,171,1344,149,1392,138.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
}

.hero-content {
    text-align: center;
    color: white;
    z-index: 1;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: #ffd700;
}

.hero-btn {
    display: inline-block;
    padding: 1rem 3rem;
    background: #ffd700;
    color: #1a237e;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.3);
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    text-align: center;
    animation: bounce 2s infinite;
}

.hero-scroll i {
    margin-top: 10px;
    font-size: 1.5rem;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Section 通用样式 */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-top: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: #1a237e;
    margin-bottom: 1rem;
}

.section-header.light h2 {
    color: white;
}

.divider {
    width: 80px;
    height: 3px;
    background: #ffd700;
    margin: 0 auto 1rem;
}

.section-header p {
    color: #666;
    font-size: 1.1rem;
}

.section-header.light p {
    color: rgba(255,255,255,0.8);
}

/* 关于我们 */
.about {
    padding: 4rem 0;
    background: #f9f9f9;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h3 {
    color: #1a237e;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.about-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: #555;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    color: #1a237e;
}

.stat-label {
    color: #666;
    font-size: 0.9rem;
}

.about-image .image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #1a237e, #ffd700);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: white;
}

/* 业务板块 */
.business {
    padding: 4rem 0;
    background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.business-card {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.business-card:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.15);
    border-color: #ffd700;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 215, 0, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    color: #ffd700;
}

.business-card h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.business-card p {
    color: rgba(255,255,255,0.8);
    line-height: 1.6;
}

/* 集团责任 */
.responsibility {
    padding: 4rem 0;
    background: white;
}

.responsibility-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.responsibility-item {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    background: #f9f9f9;
    transition: all 0.3s ease;
}

.responsibility-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.responsibility-item i {
    font-size: 3rem;
    color: #1a237e;
    margin-bottom: 1rem;
}

.responsibility-item h3 {
    color: #1a237e;
    margin-bottom: 1rem;
}

.responsibility-item p {
    color: #666;
    line-height: 1.6;
}

/* 新闻动态 */
.news {
    padding: 4rem 0;
    background: #f9f9f9;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.news-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.news-date {
    display: inline-block;
    background: #1a237e;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.news-date .day {
    font-size: 1.5rem;
    font-weight: bold;
    display: block;
}

.news-date .month {
    font-size: 0.8rem;
}

.news-card h3 {
    color: #1a237e;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.news-card p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.news-link {
    color: #ffd700;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

.news-link:hover {
    color: #1a237e;
}

/* 联系方式 */
.contact {
    padding: 4rem 0;
    background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-info {
    color: white;
}

.info-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.info-item i {
    font-size: 2rem;
    color: #ffd700;
    margin-top: 0.5rem;
}

.info-item h3 {
    margin-bottom: 0.5rem;
}

.info-item p {
    color: rgba(255,255,255,0.8);
}

.contact-form {
    background: rgba(255,255,255,0.1);
    padding: 2rem;
    border-radius: 10px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1rem;
    border: none;
    border-radius: 5px;
    background: rgba(255,255,255,0.9);
    font-size: 1rem;
}

.contact-form button {
    width: 100%;
    padding: 1rem;
    background: #ffd700;
    color: #1a237e;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-form button:hover {
    background: #ffed4e;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

/* 页脚 */
.footer {
    background: #0d1b3e;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    color: #ffd700;
    margin-bottom: 0.5rem;
}

.footer-links h4,
.footer-social h4 {
    color: #ffd700;
    margin-bottom: 1rem;
}

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

.footer-links a {
    color: white;
    text-decoration: none;
    line-height: 2;
    transition: color 0.3s ease;
}

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

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-icons a:hover {
    background: #ffd700;
    color: #1a237e;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.6);
}

.footer-bottom a {
    color: #ffd700;
    text-decoration: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(26, 35, 126, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .business-grid,
    .responsibility-content,
    .news-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 1rem;
    }
}