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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

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

ul {
    list-style: none;
}

.btn {
    display: inline-block;
    background: #007bff;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-align: center;
    transition: background 0.3s;
}

.btn:hover {
    background: #0056b3;
}

/* 头部样式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo h1 {
    font-size: 1.8rem;
    color: #007bff;
}

nav ul {
    display: flex;
}

nav li {
    margin-left: 20px;
}

nav a {
    color: #333;
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

nav a:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: #007bff;
    transition: width 0.3s;
}

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

nav a.active {
    color: #007bff;
}

/* 首页样式 */
.hero {
    background: linear-gradient(to right, #007bff, #00c6ff);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero .btn {
    background: #fff;
    color: #007bff;
}

.hero .btn:hover {
    background: #f0f0f0;
}

.features {
    padding: 80px 0;
    background: #fff;
}

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

.feature-box {
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
    text-align: center;
}

.feature-box:hover {
    transform: translateY(-10px);
}

.feature-box h3 {
    margin-bottom: 15px;
    color: #007bff;
}

/* 关于页面样式 */
.about-content {
    padding: 80px 0;
}

.about-content h1 {
    margin-bottom: 30px;
    text-align: center;
    color: #007bff;
}

.about-text {
    margin-bottom: 40px;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.vision h2 {
    color: #007bff;
    margin-bottom: 20px;
}

.vision ul {
    padding-left: 20px;
}

.vision li {
    margin-bottom: 10px;
    list-style-type: disc;
    margin-left: 20px;
}

/* 联系页面样式 */
.contact-content {
    padding: 80px 0;
}

.contact-content h1 {
    margin-bottom: 20px;
    text-align: center;
    color: #007bff;
}

.contact-intro {
    text-align: center;
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.contact-form {
    max-width: 700px;
    margin: 0 auto 60px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
}

.contact-info {
    max-width: 700px;
    margin: 0 auto;
    padding-top: 40px;
    border-top: 1px solid #ddd;
}

.contact-info h2 {
    color: #007bff;
    margin-bottom: 20px;
}

.contact-info p {
    margin-bottom: 15px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    padding: 8px 15px;
    border-radius: 5px;
    background-color: #f0f0f0;
    transition: background 0.3s;
}

.social-link:hover {
    background-color: #e0e0e0;
}

/* 页脚样式 */
footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 20px 0;
}

/* 响应式样式 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    header .container {
        flex-direction: column;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    nav ul {
        margin-top: 10px;
    }
    
    .features .container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav li {
        margin: 5px 0;
    }
}