* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background: linear-gradient(135deg, #f0f8ff 0%, #e6f7ff 100%);
            color: #333;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #1e90ff;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff6b6b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .site-header {
            background: #1a237e;
            color: white;
            padding: 1rem 2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            font-style: italic;
            color: #4fc3f7;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .my-logo a:hover {
            color: #ffcc00;
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            transition: background 0.3s;
        }
        .main-nav a:hover {
            background: rgba(255,255,255,0.2);
            text-decoration: none;
        }
        .breadcrumb {
            background: #e3f2fd;
            padding: 0.8rem 2rem;
            font-size: 0.95rem;
            color: #555;
            border-bottom: 1px solid #bbdefb;
        }
        .breadcrumb a {
            color: #1e88e5;
        }
        .breadcrumb a:hover {
            color: #0d47a1;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 0.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
            flex: 1;
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        article {
            background: white;
            padding: 3rem;
            border-radius: 18px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        h1 {
            color: #0d47a1;
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #ff6b6b;
            padding-left: 1rem;
        }
        h2 {
            color: #1a237e;
            font-size: 2.4rem;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #4fc3f7;
        }
        h3 {
            color: #283593;
            font-size: 1.8rem;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            color: #3949ab;
            font-size: 1.4rem;
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.15rem;
            text-align: justify;
        }
        .highlight {
            background: #e3f2fd;
            padding: 1.5rem;
            border-left: 5px solid #1e90ff;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .emoji {
            font-size: 1.3rem;
            margin-right: 0.5rem;
        }
        .last-updated {
            font-style: italic;
            color: #777;
            text-align: right;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        .functional-section {
            background: #f9f9f9;
            padding: 2rem;
            border-radius: 12px;
            margin: 2rem 0;
        }
        .functional-section h2 {
            color: #d32f2f;
            border-bottom: none;
            text-align: center;
        }
        form {
            display: grid;
            gap: 1rem;
            max-width: 600px;
            margin: 1.5rem auto;
        }
        input, textarea, select {
            padding: 1rem;
            border: 2px solid #bbdefb;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #1e90ff;
            outline: none;
        }
        button {
            background: linear-gradient(to right, #1e90ff, #4fc3f7);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            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 6px 12px rgba(30, 144, 255, 0.4);
        }
        .rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            font-size: 2rem;
            color: #ffcc00;
            margin: 1rem 0;
        }
        .rating i {
            cursor: pointer;
            transition: transform 0.2s;
        }
        .rating i:hover {
            transform: scale(1.3);
        }
        .site-footer {
            background: #1a237e;
            color: white;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: #4fc3f7;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        friend-link {
            display: block;
            margin: 0.8rem 0;
            font-size: 1.1rem;
        }
        friend-link a {
            color: #bbdefb;
            padding: 0.5rem;
            display: inline-block;
            border-radius: 4px;
        }
        friend-link a:hover {
            background: rgba(255,255,255,0.1);
            color: white;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #3949ab;
            font-size: 0.95rem;
            color: #bbdefb;
        }
        @media (max-width: 1024px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.1rem; }
            .container { padding: 0 1.5rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: flex;
            }
            .main-nav a {
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .hamburger { display: block; }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.9rem; }
            .footer-container { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            .site-header, .breadcrumb { padding: 1rem; }
            .container { padding: 0 1rem; }
            article { padding: 1.5rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
        }