* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            color: #3a86ff;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #2667cc;
            text-decoration: underline;
        }
        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, #1a237e 0%, #283593 100%);
            color: white;
            padding: 1rem 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;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #00e5ff;
        }
        .my-logo:hover {
            text-decoration: none;
            color: #bbdefb;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: #e3f2fd;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        nav a:hover {
            text-decoration: none;
            color: #bbdefb;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #00e5ff;
            transition: width 0.3s ease;
        }
        nav a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            background-color: #e8eaf6;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #c5cae9;
        }
        .breadcrumb a {
            color: #5c6bc0;
        }
        .breadcrumb span {
            color: #7986cb;
        }
        .search-bar {
            background: #e3f2fd;
            padding: 1.5rem 0;
            margin-bottom: 2rem;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(30, 60, 114, 0.2);
        }
        .search-input {
            flex-grow: 1;
            padding: 15px 25px;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background: #3a86ff;
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-button:hover {
            background: #2667cc;
        }
        main {
            padding: 2rem 0;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin-bottom: 3rem;
        }
        .article-header {
            text-align: center;
            padding-bottom: 2rem;
            border-bottom: 2px solid #e0e0e0;
            margin-bottom: 3rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #666;
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 1rem;
        }
        .article-meta i {
            margin-right: 5px;
            color: #3a86ff;
        }
        .content-section {
            padding: 0 2.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #c5cae9;
        }
        h3 {
            font-size: 1.6rem;
            color: #3949ab;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #5c6bc0;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(120deg, #e3f2fd 0%, #f3e5f5 100%);
            border-left: 5px solid #3a86ff;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
            font-size: 1.15rem;
        }
        .tip-box {
            background-color: #f1f8e9;
            border: 1px solid #c5e1a5;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 1.8rem 0;
        }
        .tip-box h4 {
            color: #689f38;
            margin-top: 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: #f5f5f5;
            padding: 1.5rem;
            border-radius: 8px;
            text-align: center;
            border-top: 4px solid #3a86ff;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: #1a237e;
            display: block;
        }
        .feature-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2.5rem auto;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            border: 1px solid #ddd;
        }
        .interactive-section {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
        }
        .user-interaction {
            background: #f1f8ff;
            border-radius: 10px;
            padding: 2.5rem;
            margin-top: 4rem;
            border: 1px solid #bbdefb;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #1a237e;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #90caf9;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: #3a86ff;
            box-shadow: 0 0 0 3px rgba(58, 134, 255, 0.2);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            direction: rtl;
            margin-bottom: 1rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ccc;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ffc107;
        }
        .submit-button {
            background: linear-gradient(to right, #3a86ff, #6f42c1);
            color: white;
            border: none;
            padding: 14px 30px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .submit-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(58, 134, 255, 0.4);
        }
        footer {
            background: #1a237e;
            color: #e8eaf6;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: #bbdefb;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid #3949ab;
            padding-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #c5cae9;
        }
        .footer-links a:hover {
            color: #00e5ff;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: #283593;
            padding: 1.2rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            text-align: center;
            transition: background 0.3s;
        }
        friend-link:hover {
            background: #3949ab;
        }
        friend-link a {
            color: #bbdefb;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #283593;
            font-size: 0.9rem;
            color: #9fa8da;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            .content-section { padding: 0 1.5rem; }
            .footer-content { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav {
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #283593;
                flex-direction: column;
                display: none;
                padding: 1rem 0;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            nav.active {
                display: flex;
            }
            nav ul {
                flex-direction: column;
                gap: 0;
                width: 100%;
            }
            nav li {
                width: 100%;
                text-align: center;
            }
            nav a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid #3949ab;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .stats-grid { grid-template-columns: 1fr; }
            .footer-content { grid-template-columns: 1fr; }
        }
        @media (max-width: 576px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .content-section { padding: 0 1rem; }
            .user-interaction { padding: 1.5rem; }
            .article-meta { flex-direction: column; gap: 0.5rem; }
        }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 3rem; }
        .emoji { font-size: 1.2em; }
        .bold { font-weight: 700; color: #1a237e; }
        .update-time { color: #d81b60; font-weight: 600; }