* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #3a6ea5; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #ff6b6b; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #1a237e, #283593, #3949ab);
            color: white;
            padding: 1.2rem 0;
            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;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            color: #FFD700;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        .logo span { color: #00e5ff; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background: #e8f4fc;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #c5e1f9;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #1a237e; }
        .search-box {
            background: #fff;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
            margin: 2rem auto;
            max-width: 800px;
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex-grow: 1;
            padding: 15px;
            border: 2px solid #c5e1f9;
            border-radius: 8px;
            font-size: 1.1rem;
        }
        .search-btn {
            background: linear-gradient(90deg, #ff6b6b, #ff8e8e);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.2s;
        }
        .search-btn:hover {
            transform: scale(1.05);
        }
        main { flex: 1; padding: 2rem 0; }
        article { background: white; border-radius: 16px; padding: 3rem; box-shadow: 0 10px 30px rgba(0,0,0,0.05); margin-bottom: 3rem; }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #FFD700;
            padding-left: 20px;
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #c5e1f9;
        }
        h3 {
            font-size: 1.5rem;
            color: #3949ab;
            margin: 1.8rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.3rem;
            color: #555;
            background: #f0f8ff;
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 2.5rem;
            border-left: 5px solid #00e5ff;
        }
        .highlight {
            background: linear-gradient(120deg, #ffecb3 0%, #ffecb3 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .image-container {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 900px;
        }
        .image-container img {
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            border: 8px solid white;
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .data-box {
            background: #f9f9ff;
            border: 2px solid #d1d9ff;
            border-radius: 12px;
            padding: 1.8rem;
            margin: 2rem 0;
        }
        .data-box h4 { color: #ff6b6b; margin-bottom: 1rem; }
        blockquote {
            border-left: 5px solid #FFD700;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background: #fffdf0;
            padding: 1.5rem;
            border-radius: 0 10px 10px 0;
        }
        .rating-comment-section {
            background: #f8fbff;
            border-radius: 16px;
            padding: 2.5rem;
            margin-top: 3rem;
            border: 1px solid #d1e3ff;
        }
        .rating-form, .comment-form {
            margin-bottom: 2.5rem;
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active { color: #FFD700; }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #c5e1f9;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3a6ea5;
        }
        .submit-btn {
            background: linear-gradient(90deg, #3949ab, #3a6ea5);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }
        .submit-btn:hover {
            background: linear-gradient(90deg, #283593, #3949ab);
            box-shadow: 0 5px 15px rgba(57, 73, 171, 0.4);
        }
        .longtail-links {
            background: #1a237e;
            padding: 3rem 20px;
            color: white;
        }
        .web-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            margin: 0.8rem;
            padding: 0.8rem 1.5rem;
            border-radius: 50px;
            transition: all 0.3s;
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-3px);
        }
        .web-link a { color: #FFD700; }
        .footer-content {
            background: #0d1533;
            color: #b0b0b0;
            padding: 3rem 20px;
            text-align: center;
        }
        .footer-links { margin-bottom: 2rem; }
        .footer-links a { color: #c5e1f9; margin: 0 1rem; }
        .copyright { font-size: 0.9rem; margin-top: 1.5rem; }
        @media (max-width: 992px) {
            .main-nav ul { gap: 1rem; }
            h1 { font-size: 2.4rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background: #283593;
                flex-direction: column;
                align-items: center;
                padding: 2rem;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                width: 100%;
                text-align: center;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .header-container { flex-wrap: wrap; }
            .search-form { flex-direction: column; }
            .search-btn { padding: 15px; }
        }