/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Noto Sans SC", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f8fc;
}

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #007acc; /* 蔚蓝色 */
    padding: 1rem 5%;
    color: white;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 122, 204, 0.3);
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    letter-spacing: 1px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #cce5ff;
}

/* 英雄区域 */
.hero {
    text-align: center;
    padding: 6rem 2rem;
    background: linear-gradient(to bottom, #007acc, #005a99);
    color: white;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* 内容区块 */
.section {
    max-width: 900px;
    margin: 3rem auto;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 122, 204, 0.1);
    text-align: center;
}

.section h2 {
    color: #007acc;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.section p {
    margin-bottom: 1.5rem;
    color: #555;
    font-size: 1.1rem;
}

/* CTA按钮 */
.cta button {
    background-color: #007acc;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

.cta button:hover {
    background-color: #005a99;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 2rem;
    background-color: #007acc;
    color: white;
    font-size: 0.9rem;
    margin-top: 3rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .nav-links {
        gap: 1rem;
        flex-direction: column;
    }

    .section {
        margin: 2rem;
        padding: 1.5rem;
    }
}