* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.7; color: #2c3e50; background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%); }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: #2c3e50; padding: 1.2rem 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000; }
        .header-inner { display: flex; justify-content: space-between; align-items: center; }
        .logo a { font-size: 2.2rem; font-weight: 800; color: #1abc9c; text-decoration: none; text-transform: uppercase; letter-spacing: 1.5px; transition: color 0.3s ease; }
        .logo a:hover { color: #16a085; }
        .nav-links { display: flex; list-style: none; }
        .nav-links li { margin-left: 30px; }
        .nav-links a { color: #ecf0f1; text-decoration: none; font-weight: 600; padding: 8px 16px; border-radius: 25px; transition: all 0.3s ease; }
        .nav-links a:hover, .nav-links a.active { background: #1abc9c; color: white; }
        .hamburger { display: none; font-size: 1.8rem; color: white; cursor: pointer; }
        .breadcrumb { background: #34495e; padding: 12px 0; color: #bdc3c7; font-size: 0.95rem; }
        .breadcrumb a { color: #1abc9c; text-decoration: none; }
        .breadcrumb a:hover { text-decoration: underline; }
        main { display: grid; grid-template-columns: 1fr 300px; gap: 40px; margin: 30px 0; }
        article { background: white; padding: 40px; border-radius: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.08); }
        aside { background: white; padding: 25px; border-radius: 15px; box-shadow: 0 8px 20px rgba(0,0,0,0.06); align-self: start; }
        h1 { font-size: 3rem; color: #2c3e50; margin-bottom: 25px; line-height: 1.2; border-left: 8px solid #1abc9c; padding-left: 20px; }
        h2 { font-size: 2.2rem; color: #2980b9; margin: 40px 0 20px; padding-bottom: 10px; border-bottom: 3px dashed #3498db; }
        h3 { font-size: 1.8rem; color: #16a085; margin: 30px 0 15px; }
        h4 { font-size: 1.4rem; color: #27ae60; margin: 25px 0 12px; }
        p { margin-bottom: 22px; font-size: 1.1rem; text-align: justify; }
        img { max-width: 100%; height: auto; border-radius: 15px; margin: 30px auto; display: block; box-shadow: 0 8px 20px rgba(0,0,0,0.1); border: 5px solid #ecf0f1; }
        .highlight { background: linear-gradient(90deg, #e3f2fd, #fce4ec); padding: 25px; border-radius: 12px; margin: 30px 0; border-left: 6px solid #e91e63; }
        a { color: #3498db; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #e74c3c; text-decoration: underline; }
        .function-box { background: #f8f9fa; padding: 30px; border-radius: 15px; margin: 40px 0; border: 2px solid #dfe6e9; }
        form { display: flex; flex-direction: column; gap: 20px; }
        input, textarea, select { padding: 15px; border: 2px solid #bdc3c7; border-radius: 10px; font-size: 1rem; transition: border 0.3s; }
        input:focus, textarea:focus, select:focus { border-color: #1abc9c; outline: none; }
        button { padding: 15px 30px; background: linear-gradient(90deg, #1abc9c, #16a085); color: white; border: none; border-radius: 10px; font-size: 1.1rem; font-weight: bold; cursor: pointer; transition: transform 0.3s, box-shadow 0.3s; }
        button:hover { transform: translateY(-3px); box-shadow: 0 7px 15px rgba(26, 188, 156, 0.4); }
        footer { background: #2c3e50; color: white; padding: 50px 0 25px; margin-top: 60px; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; }
        friend-link { display: block; margin: 20px 0; }
        .friend-links { list-style: none; }
        .friend-links li { margin-bottom: 15px; }
        .friend-links a { color: #1abc9c; font-weight: 600; }
        .copyright { text-align: center; margin-top: 40px; padding-top: 25px; border-top: 1px solid #34495e; color: #95a5a6; font-size: 0.9rem; }
        .last-updated { background: #fff3cd; color: #856404; padding: 15px; border-radius: 10px; margin-bottom: 30px; text-align: center; font-weight: bold; }
        @media (max-width: 992px) {
            main { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; width: 100%; background: #2c3e50; padding: 20px; }
            .nav-links.active { display: flex; }
            .nav-links li { margin: 10px 0; }
            .hamburger { display: block; }
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
        }