* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #222; background: #f8f9fa; }
        a { text-decoration: none; color: #d32f2f; transition: color 0.3s; }
        a:hover { color: #9a0007; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 15px; }
        header { background: linear-gradient(135deg, #1a237e 0%, #311b92 100%); color: white; padding: 15px 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
        .header-inner { display: flex; justify-content: space-between; align-items: center; }
        .my-logo { font-size: 2.2rem; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; color: #ffeb3b; }
        .my-logo:hover { color: #ffc107; }
        nav { display: flex; align-items: center; }
        .nav-links { display: flex; list-style: none; }
        .nav-links li { margin-left: 25px; }
        .nav-links a { color: white; font-weight: 500; padding: 8px 12px; border-radius: 4px; }
        .nav-links a:hover { background: rgba(255,255,255,0.1); }
        .hamburger { display: none; font-size: 1.8rem; cursor: pointer; }
        .breadcrumb { background: #3949ab; padding: 12px 0; color: #e8eaf6; font-size: 0.95rem; }
        .breadcrumb a { color: #ffeb3b; }
        .breadcrumb a:hover { text-decoration: underline; }
        main { padding: 30px 0; background: white; }
        article { max-width: 1000px; margin: 0 auto; padding: 20px; }
        h1 { font-size: 2.8rem; color: #1a237e; margin-bottom: 20px; border-bottom: 3px solid #ff9800; padding-bottom: 10px; }
        h2 { font-size: 2.2rem; color: #311b92; margin-top: 35px; margin-bottom: 15px; }
        h3 { font-size: 1.8rem; color: #4527a0; margin-top: 25px; margin-bottom: 12px; }
        h4 { font-size: 1.4rem; color: #5e35b1; margin-top: 20px; margin-bottom: 10px; }
        p { margin-bottom: 18px; text-align: justify; font-size: 1.05rem; }
        .highlight { background: #e3f2fd; border-left: 5px solid #2196f3; padding: 15px; margin: 25px 0; border-radius: 0 8px 8px 0; }
        .update-time { color: #666; font-style: italic; margin-bottom: 25px; }
        .content-img { width: 100%; max-width: 800px; height: auto; border-radius: 10px; margin: 25px auto; box-shadow: 0 6px 15px rgba(0,0,0,0.1); }
        .internal-link { background: #f1f8e9; padding: 2px 8px; border-radius: 3px; font-weight: 500; }
        .internal-link:hover { background: #dcedc8; }
        .functions { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; margin: 40px 0; }
        .function-box { background: #f5f5f5; padding: 20px; border-radius: 10px; border: 1px solid #e0e0e0; }
        .function-box h3 { margin-top: 0; color: #d32f2f; }
        form input, form textarea, form select, form button { width: 100%; padding: 12px; margin-bottom: 12px; border: 1px solid #ccc; border-radius: 6px; font-size: 1rem; }
        form button { background: #d32f2f; color: white; font-weight: bold; cursor: pointer; border: none; }
        form button:hover { background: #b71c1c; }
        footer { background: #1a237e; color: white; padding: 40px 0; text-align: center; }
        friend-link { display: block; margin: 20px 0; }
        friend-link a { color: #ffeb3b; font-weight: bold; margin: 0 10px; }
        .footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 15px; margin: 25px 0; }
        .footer-links a { color: #bbdefb; }
        .footer-links a:hover { color: white; }
        .copyright { margin-top: 20px; color: #9fa8da; font-size: 0.9rem; }
        @media (max-width: 768px) {
            .nav-links { display: none; flex-direction: column; position: absolute; top: 80px; left: 0; width: 100%; background: #311b92; padding: 20px; z-index: 1000; }
            .nav-links.active { display: flex; }
            .nav-links li { margin: 10px 0; }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.9rem; }
            .functions { grid-template-columns: 1fr; }
            .header-inner { flex-wrap: wrap; }
        }
        .emoji { font-size: 1.2em; }
        .bold { font-weight: 700; color: #1a237e; }
        .section-break { height: 2px; background: linear-gradient(to right, transparent, #ff9800, transparent); margin: 30px 0; }