.site-header{position:relative;height:72px;padding:0 24px;background:#fff;border-bottom:1px solid #ddd;display:flex;align-items:center}.header-left{display:flex;align-items:center;gap:12px}.hamburger-button{font-size:30px;border:none;background:transparent;cursor:pointer}.profile-icon{width:42px;height:42px;border-radius:50%;object-fit:cover;border:2px solid #ddd}.site-logo{font-size:22px;font-weight:700}.hamburger-menu{position:absolute;top:72px;left:16px;z-index:1000;width:220px;padding:16px;background:#fff;border-radius:12px;border:1px solid #ddd;box-shadow:0 8px 24px #00000026;display:flex;flex-direction:column;gap:14px}.hamburger-menu a{text-decoration:none;color:#222;font-weight:500}.hamburger-menu a:hover{color:#2563eb}body{margin:0;font-family:system-ui,sans-serif;background:#f5f7fb;color:#222}a{color:inherit;text-decoration:none}.main{max-width:1100px;margin:0 auto;padding:40px 20px}.hero{text-align:center;padding:60px 0}.hero h1{margin:0 0 12px;font-size:42px}.hero p{color:#666;font-size:18px}.article-section h2{margin-bottom:24px}.article-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}.article-card{padding:24px;background:#fff;border-radius:18px;border:1px solid #e5e7eb;box-shadow:0 8px 24px #0000000f}.article-category{display:inline-block;margin-bottom:12px;padding:4px 10px;font-size:12px;font-weight:700;color:#2563eb;background:#eef4ff;border-radius:999px}.article-card h3{margin:0 0 12px;font-size:20px}.article-card p{margin:0;line-height:1.7;color:#555}.article-date{margin-top:20px;font-size:13px;color:#888}.footer{margin-top:60px;padding:32px 20px;text-align:center;color:#777;background:#fff;border-top:1px solid #e5e5e5}