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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, "Microsoft YaHei", sans-serif;
    background: #f7f7f7;
    color: #222;
}

nav {
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 0 10%;

    background: white;
    border-bottom: 1px solid #eee;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #333;
}

.nav-links a:hover {
    color: #666;
}

.hero {
    min-height: 85vh;

    display: flex;
    flex-direction: column;

    justify-content: center;
    align-items: center;

    text-align: center;

    background: linear-gradient(
        135deg,
        #ffffff,
        #eeeeee
    );
}

.hero h1 {
    font-size: 64px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    color: #666;
    margin-bottom: 30px;
}

.button {
    padding: 12px 28px;

    background: #222;
    color: white;

    text-decoration: none;

    border-radius: 8px;
}

section {
    max-width: 1000px;

    margin: auto;

    padding: 100px 30px;
}

section h2 {
    font-size: 36px;
    margin-bottom: 30px;
}

section p {
    line-height: 1.8;
    color: #555;
}

.project-card {
    background: white;

    padding: 30px;

    margin: 20px 0;

    border-radius: 12px;

    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.project-card h3 {
    margin-bottom: 10px;
}

footer {
    text-align: center;

    padding: 40px;

    color: #888;
}