* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}
body {
    background-color: #161b22;
    color: #e1e6f0;
    line-height: 1.6;
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 4rem;
    background-color: #0d1117;
    border-bottom: 1px solid #30363d;
}
.nav-title {
    font-size: 22px;
    font-weight: bold;
}
.nav-menu a {
    color: #c9d1d9;
    text-decoration: none;
    margin-left: 24px;
}
.nav-menu a.active, .nav-menu a:hover {
    color: #58a6ff;
}
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 20px;
}
.hero {
    text-align: center;
    padding: 60px 0;
}
.hero h1 {
    font-size: 36px;
    margin-bottom:12px;
}
.hero p {
    color:#8b949e;
    font-size:18px;
}
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px,1fr));
    gap:24px;
    margin:40px 0;
}
.card {
    background: #21262d;
    padding:28px;
    border-radius:12px;
    border:1px solid #30363d;
    transition: 0.2s;
}
.card:hover {
    border-color:#58a6ff;
    transform: translateY(-4px);
}
.card h3 {
    margin-bottom:10px;
}
.card p {
    color:#8b949e;
    margin-bottom:20px;
}
.btn {
    display: inline-block;
    padding: 8px 16px;
    background:#238636;
    color:white;
    border-radius:6px;
    text-decoration:none;
}
.link-section {
    margin-top:60px;
}
.link-list {
    display:flex;
    flex-wrap:wrap;
    gap:16px;
    margin-top:16px;
}
.link-list a {
    padding:10px 16px;
    background:#21262d;
    color:#58a6ff;
    border-radius:8px;
    text-decoration:none;
}
footer {
    text-align:center;
    padding:30px;
    color:#8b949e;
    border-top:1px solid #30363d;
    margin-top:60px;
}