* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: #1a73e8;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #0d47a1;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background: linear-gradient(135deg, #0d47a1 0%, #1976d2 100%);
            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;
        }
        .logo a {
            color: white;
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 10px;
            font-size: 2rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e3f2fd;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: white;
            text-decoration: none;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #ffd600;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: #1565c0;
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            z-index: 999;
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            padding: 0.8rem 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .search-box {
            display: flex;
            max-width: 300px;
            width: 100%;
        }
        .search-box input {
            flex-grow: 1;
            padding: 0.7rem 1rem;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-box button {
            background-color: #ffd600;
            color: #0d47a1;
            border: none;
            padding: 0.7rem 1.2rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            font-weight: bold;
            transition: background-color 0.3s;
        }
        .search-box button:hover {
            background-color: #ffca28;
        }
        .breadcrumb {
            background-color: #e3f2fd;
            padding: 1rem 2rem;
            font-size: 0.9rem;
            color: #555;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }
        .breadcrumb a {
            color: #1976d2;
        }
        .content-container {
            flex: 1;
            display: flex;
            flex-direction: column;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            width: 100%;
        }
        .main-article {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: 0 6px 20px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        article h1 {
            font-size: 2.8rem;
            color: #0d47a1;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #ffd600;
            padding-bottom: 0.5rem;
        }
        article h2 {
            font-size: 2rem;
            color: #1565c0;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.5rem;
            border-left: 5px solid #1a73e8;
        }
        article h3 {
            font-size: 1.5rem;
            color: #1976d2;
            margin: 2rem 0 1rem;
        }
        article p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9c4;
            padding: 1.5rem;
            border-left: 4px solid #ffd600;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .internal-link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
            padding: 1.5rem;
            background: #f1f8ff;
            border-radius: 8px;
        }
        .internal-link-list a {
            display: block;
            padding: 0.8rem;
            background: white;
            border-radius: 6px;
            border: 1px solid #bbdefb;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .internal-link-list a:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(25, 118, 210, 0.1);
            text-decoration: none;
        }
        .article-image {
            width: 80%;
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .article-image figcaption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.8rem;
            background: #f5f5f5;
        }
        .user-interaction {
            background: #f5f9ff;
            border-radius: 12px;
            padding: 2.5rem;
            margin-top: 3rem;
            border: 1px solid #c5dbfc;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .comment-section, .rating-section {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        }
        .comment-section h3, .rating-section h3 {
            margin-top: 0;
        }
        textarea, select, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 1rem;
            margin-bottom: 1rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        textarea:focus, select:focus, input:focus {
            outline: none;
            border-color: #1a73e8;
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.2);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 1.8rem;
            color: #ffd600;
        }
        .rating-stars i {
            cursor: pointer;
            transition: transform 0.2s;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        .submit-btn {
            background: linear-gradient(to right, #0d47a1, #1976d2);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            display: block;
            width: 100%;
            font-size: 1.1rem;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, #1565c0, #1a73e8);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(13, 71, 161, 0.3);
        }
        site-footer {
            background: #0d47a1;
            color: white;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        friend-link {
            display: block;
            font-size: 1rem;
            margin-bottom: 0.5rem;
        }
        friend-link a {
            color: #bbdefb;
        }
        friend-link a:hover {
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #bbdefb;
        }
        @media (max-width: 1024px) {
            .main-article {
                padding: 2rem;
            }
            article h1 {
                font-size: 2.4rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .main-nav ul {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .search-box {
                order: 3;
                margin-top: 1rem;
                max-width: 100%;
            }
            .breadcrumb, .content-container {
                padding: 1rem;
            }
            .main-article {
                padding: 1.5rem;
            }
            article h1 {
                font-size: 2rem;
            }
            article h2 {
                font-size: 1.7rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }