body {
    margin: 0;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

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

.logo img {
    width: 30px;
    margin-right: 10px;
}

.nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

.nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
}

.hero {
    background: linear-gradient(to bottom right, #00bcd4, #80deea);
    color: #fff;
    text-align: center;
    padding: 4rem 2rem;
}

.hero-content h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
}

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

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary {
    background-color: #fff;
    color: #007bff;
    border: 2px solid #007bff;
}

.btn-secondary:hover {
    background-color: #007bff;
    color: #fff;
}

/* About Section */
.about {
    padding: 3rem 2rem;
    text-align: center;
    background-color: #f0f8fa; /* 与 hero 区域颜色协调 */
    color: #333;
}

.about h2 {
    font-size: 2.5rem; /* 字体更大 */
    color: #007bff; /* 与 hero 按钮颜色一致 */
    margin-bottom: 1rem;
}

.about p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #555;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 200px;
}

.stat h3 {
    font-size: 2rem; /* 字体更大 */
    color: #007bff; /* 与 hero 按钮颜色一致 */
    margin-bottom: 0.5rem;
}

.stat p {
    font-size: 1rem;
    color: #666;
}

/* Services Section */
.services {
    padding: 3rem 2rem;
    text-align: center;
    background-color: #e8f5fe; /* 与 hero 区域颜色协调 */
    color: #333;
}

.services h2 {
    font-size: 2.5rem;
    color: #007bff; /* 与 hero 按钮颜色一致 */
    margin-bottom: 1rem;
}

.service-cards {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    text-align: center;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 250px;
}

.card h3 {
    font-size: 1.8rem;
    color: #007bff; /* 与 hero 按钮颜色一致 */
    margin-bottom: 1rem;
}

.card p {
    font-size: 1rem;
    color: #666;
}

/* Why Us Section */
.why-us {
    padding: 3rem 2rem;
    text-align: center;
    background-color: #f0f8fa; /* 与 hero 和 about 区域颜色协调 */
    color: #333;
}

.why-us h2 {
    font-size: 2.5rem;
    color: #007bff; /* 与 hero 按钮颜色一致 */
    margin-bottom: 1.5rem;
}

.features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.feature {
    text-align: center;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    width: 250px;
}

.feature h3 {
    font-size: 1.8rem;
    color: #007bff; /* 与 hero 按钮颜色一致 */
    margin-bottom: 1rem;
}

.feature p {
    font-size: 1rem;
    color: #666;
}

.footer {
    text-align: center;
    padding: 1rem;
    background-color: #f8f8f8;
}