* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; background: #f8f9fa; }
        a { text-decoration: none; color: #2a5caa; transition: color 0.3s; }
        a:hover { color: #1a3c7a; }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        header { background: linear-gradient(135deg, #1e3c72, #2a5298); color: white; padding: 1rem 0; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
        .header-top { display: flex; justify-content: space-between; align-items: center; }
        .my-logo { font-size: 2.2rem; font-weight: 800; letter-spacing: 1px; color: #ffd166; }
        .my-logo:hover { color: #ffbf00; }
        .hamburger { display: none; font-size: 1.8rem; cursor: pointer; }
        nav ul { display: flex; list-style: none; gap: 2rem; }
        nav a { color: white; font-weight: 600; padding: 0.5rem 1rem; border-radius: 5px; }
        nav a:hover { background: rgba(255,255,255,0.2); }
        .breadcrumb { padding: 1rem 0; font-size: 0.9rem; color: #ccc; }
        .breadcrumb a { color: #ffd166; }
        main { background: white; padding: 2rem; margin: 2rem auto; border-radius: 12px; box-shadow: 0 6px 20px rgba(0,0,0,0.08); }
        article h1 { color: #1e3c72; font-size: 2.8rem; margin-bottom: 1rem; border-bottom: 3px solid #ffd166; padding-bottom: 0.5rem; }
        article h2 { color: #2a5298; font-size: 2rem; margin: 2rem 0 1rem; padding-left: 0.5rem; border-left: 5px solid #2a5298; }
        article h3 { color: #3a6bc7; font-size: 1.6rem; margin: 1.5rem 0 0.8rem; }
        article h4 { color: #555; font-size: 1.3rem; margin: 1.2rem 0 0.6rem; }
        article p { margin-bottom: 1.2rem; text-align: justify; }
        .highlight { background: #fff9e6; padding: 1.5rem; border-left: 4px solid #ffd166; margin: 1.5rem 0; border-radius: 0 8px 8px 0; }
        .highlight strong { color: #d35400; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .feature-img { width: 80%; margin: 2rem auto; border-radius: 10px; overflow: hidden; box-shadow: 0 8px 16px rgba(0,0,0,0.15); }
        .feature-img img { width: 100%; }
        .update-time { text-align: right; font-style: italic; color: #777; margin-top: 2rem; padding-top: 1rem; border-top: 1px dashed #ddd; }
        .form-section { background: #f1f8ff; padding: 2rem; border-radius: 10px; margin: 3rem 0; }
        .form-section h3 { color: #1e3c72; }
        .form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
        .form-box { background: white; padding: 1.5rem; border-radius: 8px; box-shadow: 0 4px 8px rgba(0,0,0,0.05); }
        .form-box label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .form-box input, .form-box textarea, .form-box select { width: 100%; padding: 0.8rem; margin-bottom: 1rem; border: 1px solid #ccc; border-radius: 5px; }
        .form-box button { background: #2a5caa; color: white; border: none; padding: 0.8rem 1.5rem; border-radius: 5px; cursor: pointer; font-weight: 600; }
        .form-box button:hover { background: #1a3c7a; }
        .related-links { display: flex; flex-wrap: wrap; gap: 1rem; margin: 2rem 0; }
        .related-links a { background: #e9f0fa; padding: 0.8rem 1.5rem; border-radius: 30px; font-size: 0.95rem; }
        .related-links a:hover { background: #d4e3f7; }
        footer { background: #1e3c72; color: white; padding: 3rem 0 1.5rem; margin-top: 3rem; }
        .footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
        .footer-section h4 { color: #ffd166; margin-bottom: 1rem; }
        friend-link { display: block; margin-bottom: 0.8rem; }
        friend-link a { color: #a8d0ff; }
        friend-link a:hover { color: white; }
        .copyright { text-align: center; margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid #2a5298; font-size: 0.9rem; color: #ccc; }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav ul { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; width: 100%; background: #1e3c72; padding: 1rem; z-index: 1000; }
            nav ul.active { display: flex; }
            .header-top { flex-wrap: wrap; }
            .my-logo { font-size: 1.8rem; }
            article h1 { font-size: 2.2rem; }
            .form-grid { grid-template-columns: 1fr; }
            .feature-img { width: 100%; }
        }