* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #0047ab;
            --secondary: #ff6b00;
            --accent-light: #f0f8ff;
            --accent-dark: #1a1a2e;
            --text-primary: #333;
            --text-secondary: #555;
            --light: #fff;
            --shadow: rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--text-primary);
            background-color: #f9f9f9;
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background: #003580;
            transform: translateY(-3px);
            box-shadow: 0 7px 14px var(--shadow);
        }
        .section-padding {
            padding: 60px 0;
        }
        .text-center {
            text-align: center;
        }
        .bold {
            font-weight: 700;
        }
        .highlight {
            color: var(--secondary);
        }
        .site-header {
            background: var(--light);
            box-shadow: 0 4px 12px var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span {
            color: var(--secondary);
        }
        .my-logo:hover {
            color: var(--primary);
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        .nav-desktop a {
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 600;
            padding: 8px 5px;
            position: relative;
            transition: var(--transition);
        }
        .nav-desktop a:hover,
        .nav-desktop a.active {
            color: var(--primary);
        }
        .nav-desktop a:hover::after,
        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--accent-light);
            border-radius: 50px;
            padding: 8px 15px;
            width: 300px;
        }
        .header-search input {
            border: none;
            background: transparent;
            padding: 8px;
            width: 100%;
            outline: none;
            font-size: 0.95rem;
        }
        .header-search button {
            background: none;
            border: none;
            color: var(--primary);
            cursor: pointer;
            font-size: 1.1rem;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--primary);
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: var(--light);
            padding: 20px;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: 0 10px 15px var(--shadow);
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 15px 10px;
            text-decoration: none;
            color: var(--text-primary);
            border-bottom: 1px solid #eee;
            font-weight: 600;
        }
        .nav-mobile a:hover {
            color: var(--primary);
            background: var(--accent-light);
        }
        .breadcrumb {
            padding: 15px 20px;
            background: var(--accent-light);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--text-secondary);
            margin: 0 8px;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, #1a1a2e 100%);
            color: white;
            padding: 80px 20px;
            position: relative;
            overflow: hidden;
        }
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 25px;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 35px;
            opacity: 0.9;
        }
        .hero-btns {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero .btn-secondary {
            background: transparent;
            border: 2px solid white;
        }
        .hero .btn-secondary:hover {
            background: white;
            color: var(--primary);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 20px;
        }
        .article-content {
            background: var(--light);
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 5px 25px var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 25px;
            margin-bottom: 30px;
            border-bottom: 2px solid #eee;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .update-time {
            color: var(--secondary);
            font-weight: 600;
        }
        .article-content h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 25px;
            line-height: 1.2;
        }
        .article-content h2 {
            font-size: 2rem;
            color: var(--accent-dark);
            margin: 50px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        .article-content h3 {
            font-size: 1.6rem;
            color: var(--primary);
            margin: 35px 0 15px;
        }
        .article-content h4 {
            font-size: 1.3rem;
            color: var(--text-secondary);
            margin: 25px 0 10px;
        }
        .article-content p {
            margin-bottom: 25px;
            font-size: 1.1rem;
            color: var(--text-primary);
            line-height: 1.8;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 25px;
            padding-left: 30px;
        }
        .article-content li {
            margin-bottom: 10px;
            line-height: 1.7;
        }
        .article-content blockquote {
            border-left: 5px solid var(--secondary);
            padding-left: 25px;
            margin: 30px 0;
            font-style: italic;
            color: var(--text-secondary);
            background: var(--accent-light);
            padding: 25px;
            border-radius: 0 10px 10px 0;
        }
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 30px 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            display: block;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: none;
            border-bottom: 1px dotted var(--primary);
            transition: var(--transition);
        }
        .article-content a:hover {
            color: var(--secondary);
            border-bottom: 1px solid var(--secondary);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: var(--light);
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        .link-list a {
            display: block;
            padding: 12px 0;
            color: var(--text-primary);
            text-decoration: none;
            border-bottom: 1px solid #f0f0f0;
            transition: var(--transition);
        }
        .link-list a:hover {
            color: var(--primary);
            padding-left: 10px;
            border-bottom-color: var(--primary);
        }
        .link-list a i {
            margin-right: 10px;
            color: var(--secondary);
        }
        .interaction-forms {
            background: var(--light);
            padding: 40px;
            border-radius: 15px;
            margin-top: 40px;
            box-shadow: 0 5px 25px var(--shadow);
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .form-control {
            width: 100%;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 71, 171, 0.1);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            margin: 10px 0;
        }
        .rating-stars .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars .star.active,
        .rating-stars .star:hover {
            color: #ffc107;
        }
        .form-row {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .form-row .form-group {
            flex: 1;
            min-width: 200px;
        }
        .site-footer {
            background: var(--accent-dark);
            color: #ccc;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid #333;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            margin-bottom: 20px;
            display: block;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.2rem;
        }
        .footer-links a {
            display: block;
            color: #aaa;
            text-decoration: none;
            margin-bottom: 12px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 10px 0;
        }
        friend-link a {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            color: #888;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hero h1 {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 768px) {
            .header-search {
                width: 200px;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .hero h1 {
                font-size: 2.3rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .article-content {
                padding: 25px;
            }
            .article-content h1 {
                font-size: 2.2rem;
            }
            .article-content h2 {
                font-size: 1.8rem;
            }
            .article-content h3 {
                font-size: 1.5rem;
            }
            .form-row {
                flex-direction: column;
                gap: 0;
            }
            .hero-btns {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 300px;
            }
        }
        @media (max-width: 480px) {
            .header-container {
                flex-wrap: wrap;
            }
            .header-search {
                order: 3;
                width: 100%;
                margin-top: 15px;
            }
            .hero {
                padding: 60px 20px;
            }
            .article-content {
                padding: 20px;
            }
            .article-content h1 {
                font-size: 1.9rem;
            }
        }