/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
    color: #ffffff;
    overflow-x: hidden;
    line-height: 1.6;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    position: relative;
    display: flex;
    align-items: center;
}

.logo-text {
    font-family: 'Orbitron', monospace;
    font-size: 24px;
    font-weight: 900;
    background: linear-gradient(45deg, #00ffff, #ff00ff, #ffff00);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease-in-out infinite;
}

.logo-pulse {
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: #00ffff;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: all 0.3s ease;
    padding: 10px 0;
}

.nav-link:hover,
.nav-link.active {
    color: #00ffff;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #00ffff, #ff00ff);
    transition: width 0.3s ease;
}

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: #00ffff;
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区域 */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.neural-network {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 0, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(255, 255, 0, 0.1) 0%, transparent 50%);
    animation: networkPulse 8s ease-in-out infinite;
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #00ffff, transparent),
        radial-gradient(2px 2px at 40px 70px, #ff00ff, transparent),
        radial-gradient(1px 1px at 90px 40px, #ffff00, transparent),
        radial-gradient(1px 1px at 130px 80px, #00ffff, transparent),
        radial-gradient(2px 2px at 160px 30px, #ff00ff, transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: particleFloat 20s linear infinite;
}

.hero-content {
    text-align: center;
    z-index: 1;
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-family: 'Orbitron', monospace;
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 20px;
    position: relative;
}

.glitch {
    position: relative;
    color: #ffffff;
    animation: glitch 2s infinite;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    animation: glitch-1 0.5s infinite;
    color: #00ffff;
    z-index: -1;
}

.glitch::after {
    animation: glitch-2 0.5s infinite;
    color: #ff00ff;
    z-index: -2;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.5s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 1s both;
}

.btn {
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(45deg, #00ffff, #0080ff);
    color: #000000;
}

.btn-secondary {
    background: transparent;
    color: #ffffff;
    border: 2px solid #00ffff;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.3);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid #00ffff;
    border-bottom: 2px solid #00ffff;
    transform: rotate(45deg);
}

/* 特色资讯 */
.featured-news {
    padding: 100px 0;
    background: rgba(0, 0, 0, 0.3);
}

.section-title {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    background: linear-gradient(45deg, #00ffff, #ff00ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, #00ffff, #ff00ff);
}

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

.news-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid rgba(0, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.news-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 255, 255, 0.2);
    border-color: rgba(0, 255, 255, 0.5);
}

.news-card.featured {
    grid-column: span 2;
}

.news-image {
    height: 200px;
    position: relative;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    position: relative;
}

.image-placeholder.ai-brain {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.image-placeholder.robot {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.image-placeholder.quantum {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.image-placeholder.medical {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.image-placeholder::before {
    content: '🧠';
    font-size: 4rem;
    opacity: 0.7;
}

.image-placeholder.robot::before {
    content: '🤖';
}

.image-placeholder.quantum::before {
    content: '⚛️';
}

.image-placeholder.medical::before {
    content: '🏥';
}

.news-category {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(0, 255, 255, 0.9);
    color: #000000;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.news-content {
    padding: 25px;
}

.news-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #ffffff;
    line-height: 1.4;
}

.news-content p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
    line-height: 1.6;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

/* 技术趋势 */
.tech-trends {
    padding: 100px 0;
}

.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.trend-item {
    text-align: center;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    border: 1px solid rgba(0, 255, 255, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.trend-item:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 255, 255, 0.5);
    box-shadow: 0 15px 30px rgba(0, 255, 255, 0.1);
}

.trend-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    filter: grayscale(0) hue-rotate(180deg);
}

.trend-item h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #00ffff;
}

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

/* 页脚 */
.footer {
    background: rgba(0, 0, 0, 0.8);
    padding: 60px 0 20px;
    border-top: 1px solid rgba(0, 255, 255, 0.2);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    color: #00ffff;
    margin-bottom: 20px;
}

.footer-section p,
.footer-section li {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 10px;
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #00ffff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* 动画 */
@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: translateY(-50%) scale(1); }
    50% { opacity: 0.5; transform: translateY(-50%) scale(1.2); }
}

@keyframes networkPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.7; }
}

@keyframes particleFloat {
    0% { transform: translateY(0px); }
    100% { transform: translateY(-100px); }
}

@keyframes glitch {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
}

@keyframes glitch-1 {
    0%, 100% { transform: translate(0); }
    10% { transform: translate(-2px, -2px); }
    20% { transform: translate(2px, 2px); }
    30% { transform: translate(-2px, 2px); }
    40% { transform: translate(2px, -2px); }
}

@keyframes glitch-2 {
    0%, 100% { transform: translate(0); }
    15% { transform: translate(2px, -2px); }
    25% { transform: translate(-2px, 2px); }
    35% { transform: translate(2px, 2px); }
    45% { transform: translate(-2px, -2px); }
}

@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); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .news-card.featured {
        grid-column: span 1;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .trends-grid {
        grid-template-columns: 1fr;
    }
}