/* 基础样式 */
body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f3f3f3;
    overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
    color: #4567b7;
}
a {
    text-decoration: none;
    color: #ff9800;
    transition: color 0.3s ease-in-out;
}
a:hover {
    color: #e68a00;
}
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
}
.grid-container {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
}
.section {
    padding: 60px 0;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
.section:nth-child(even) {
    background-color: #f9f9f9;
}
.header {
    background: linear-gradient(135deg, #4567b7, #6a8dc5);
    color: #fff;
    text-align: center;
    padding: 80px 20px;
}
.header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}
.header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
}
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(69, 103, 183, 0.9);
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
.navbar ul {
    display: flex;
    justify-content: center;
    list-style: none;
    margin: 0;
    padding: 0;
}
.navbar li {
    margin: 0 15px;
}
.navbar a {
    color: #fff;
    font-size: 1rem;
    padding: 15px 20px;
    border-radius: 4px;
}
.navbar a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}
.cta-button {
    display: inline-block;
    background-color: #ff9800;
    color: #fff;
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 1rem;
    transition: transform 0.3s ease-in-out;
}
.cta-button:hover {
    transform: scale(1.05);
}
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}
.image-grid img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
    transition: transform 0.3s ease-in-out;
}
.image-grid img:hover {
    transform: scale(1.05);
}
.data-visualization {
    text-align: center;
}
.chart {
    max-width: 600px;
    margin: 0 auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
@media (max-width: 768px) {
    .header h1 {
        font-size: 2.5rem;
    }
    .header p {
        font-size: 1rem;
    }
    .navbar ul {
        flex-direction: column;
        align-items: center;
    }
    .navbar li {
        margin: 10px 0;
    }
}
@media (max-width: 480px) {
    .header h1 {
        font-size: 2rem;
    }
    .header p {
        font-size: 0.9rem;
    }
}