* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background-color: #f8f9fa;
    color: #333842;
    line-height: 1.7;
}
/* 导航栏 */
nav {
    background: #ffffff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
}
.nav-wrap {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: flex-end;
}
nav a {
    display: block;
    padding:16px 14px;
    text-decoration: none;
    color:#333842;
    transition: 0.2s;
}
nav a:hover {
    color:#4A90D9;
}
/* 主容器 */
.container {
    max-width: 720px;
    margin: 0 auto;
    padding:40px 20px;
    text-align:center;
}
/* 头像 */
.avatar {
    width:130px;
    height:130px;
    border-radius: 50%;
    object-fit: cover;
    border:3px solid #fff;
    box-shadow: 0 2px 10px rgba(74,144,217,0.15);
    margin-bottom:22px;
}
h1.name {
    font-size:34px;
    font-weight:600;
    margin-bottom:10px;
}
.slogan {
    font-size:17px;
    color:#555;
    margin-bottom:42px;
}
section {
    margin-bottom:44px;
}
section h2 {
    font-size:22px;
    margin-bottom:14px;
    color:#2c323b;
}
.about-text {
    text-align:left;
    background:#ffffff;
    padding:24px;
    border-radius:12px;
    box-shadow:0 1px 6px rgba(0,0,0,0.05);
}
/* 社交图标 */
.social-links {
    display:flex;
    gap:16px;
    justify-content:center;
    flex-wrap:wrap;
    margin-top:12px;
}
.social-links a {
    padding:8px 16px;
    border:1px solid #4A90D9;
    color:#4A90D9;
    text-decoration:none;
    border-radius:8px;
    transition:0.25s;
}
.social-links a:hover {
    background-color:#4A90D9;
    color:white;
}
footer {
    text-align:center;
    padding:30px 10px;
    font-size:14px;
    color:#777;
}