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

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

header {
    position: fixed;
    width: 100%;
    background: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    padding: 0.5rem 1rem;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #007bff;
}

.feature {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 80px 5%;
}

.content-wrapper {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
    gap: 2rem;
}

.reverse {
    flex-direction: row-reverse;
}

.text-content {
    flex: 1;
    padding: 2rem;
}

.text-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #007bff;
}

.text-content p {
    font-size: 1.1rem;
    color: #666;
}

.image-placeholder {
    flex: 1;
    height: 400px;
    background: #f5f5f5;
    border-radius: 10px;
    overflow: hidden;
}

.image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

footer {
    background: #f8f9fa;
    padding: 4rem 5%;
    text-align: center;
}

.contact-info {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info h2 {
    margin-bottom: 2rem;
    color: #007bff;
}

.contact-info p {
    margin: 1rem 0;
}

.contact-info a {
    color: #007bff;
    text-decoration: none;
}

.contact-info a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 1rem;
    }
    
    nav ul {
        margin-top: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .content-wrapper {
        flex-direction: column;
    }
    
    .reverse {
        flex-direction: column;
    }
    
    .text-content {
        text-align: center;
    }
    
    .image-placeholder {
        height: 300px;
    }
}

/* ... 保持其他样式不变 ... */

.feature {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 80px 5%;
    position: relative;
    overflow: hidden;
}

#global {
    background: linear-gradient(135deg, #1a2980 0%, #26d0ce 100%);
    color: white;
}

#performance {
    background: linear-gradient(135deg, #000428 0%, #004e92 100%);
    color: white;
}

#targeting {
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
    color: white;
}

#fraud {
    background: linear-gradient(135deg, #16222A 0%, #3A6073 100%);
    color: white;
}

.text-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.text-content p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

.image-placeholder {
    flex: 1;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

footer {
    background: #1a1a1a;
    color: white;
    padding: 4rem 5%;
    text-align: center;
}

.contact-info h2 {
    color: #ffffff;
}

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

.contact-info a {
    color: #26d0ce;
}

/* 添加动画效果 */
.content-wrapper {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

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


.hero {
    height: 100vh;
    background: linear-gradient(135deg, #0a192f 0%, #203a43 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px; /* 为固定导航栏留出空间 */
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
    animation: fadeIn 1s ease-out;
}

.hero h1 {
    font-size: 3.5rem;
    color: #ffffff;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}