:root {
            --primary-dark: #0a2a3a;
            --primary-accent: #f0b040;
            --secondary-accent: #3a7ca5;
            --light-bg: #f5f7fa;
            --dark-text: #222;
            --light-text: #eee;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --border-radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--light-bg);
            color: var(--dark-text);
            line-height: 1.8;
            max-width: 100%;
            overflow-x: hidden;
        }
        a {
            color: var(--secondary-accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-accent);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-dark);
            color: var(--light-text);
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            margin-right: 10px;
            color: #fff;
        }
        .my-logo:hover {
            color: #fff;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-left: 1.8rem;
        }
        .nav-links a {
            color: var(--light-text);
            font-weight: 500;
            padding: 8px 5px;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--primary-accent);
            border-bottom: 2px solid var(--primary-accent);
        }
        .hamburger {
            display: none;
            cursor: pointer;
            font-size: 1.8rem;
            color: var(--light-text);
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 12px 0;
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb span {
            color: #888;
        }
        main {
            padding: 2rem 0;
            background: #fff;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        article {
            padding: 0 2rem;
        }
        h1 {
            color: var(--primary-dark);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--primary-accent);
            padding-bottom: 15px;
        }
        h2 {
            color: var(--secondary-accent);
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            padding-left: 10px;
            border-left: 5px solid var(--primary-accent);
        }
        h3 {
            color: var(--primary-dark);
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #555;
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            background: linear-gradient(to right, #f0f4f8, #e2e8f0);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-bottom: 2.5rem;
            border-left: 5px solid var(--secondary-accent);
        }
        .highlight {
            background-color: #fff9e6;
            padding: 15px;
            border-radius: var(--border-radius);
            border: 1px dashed var(--primary-accent);
            margin: 1.5rem 0;
            font-weight: 500;
        }
        .featured-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            border: 3px solid var(--primary-dark);
        }
        .interactive-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 3rem 0;
        }
        .box {
            background: var(--light-bg);
            padding: 1.8rem;
            border-radius: var(--border-radius);
            border-top: 5px solid var(--secondary-accent);
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .box:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.12);
        }
        .box h3 {
            color: var(--secondary-accent);
            margin-top: 0;
        }
        .update-time {
            text-align: center;
            font-style: italic;
            color: #777;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #ddd;
        }
        .link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 2rem 0;
            justify-content: center;
        }
        .link-btn {
            background: var(--primary-dark);
            color: white;
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .link-btn:hover {
            background: var(--primary-accent);
            color: var(--primary-dark);
        }
        .form-section {
            margin: 4rem 0;
            padding: 2.5rem;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: var(--border-radius);
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--primary-dark);
        }
        .form-group input, .form-group textarea, .form-group select {
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus, .form-group textarea:focus {
            outline: none;
            border-color: var(--secondary-accent);
            box-shadow: 0 0 0 3px rgba(58, 124, 165, 0.2);
        }
        .stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin-top: 5px;
        }
        .stars .active {
            color: #ffc107;
        }
        .btn-submit {
            background: linear-gradient(to right, var(--secondary-accent), #2a6185);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 15px;
        }
        .btn-submit:hover {
            background: linear-gradient(to right, #2a6185, var(--secondary-accent));
            transform: scale(1.03);
        }
        footer {
            background-color: var(--primary-dark);
            color: var(--light-text);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: var(--primary-accent);
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ccc;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: var(--primary-accent);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(240, 176, 64, 0.1);
            padding: 15px;
            border-radius: var(--border-radius);
            margin: 15px 0;
            border: 1px solid rgba(240, 176, 64, 0.3);
        }
        friend-link a {
            color: var(--primary-accent);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #3a4a5a;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            article { padding: 0 1.5rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-links {
                position: fixed;
                top: 70px;
                right: -100%;
                width: 80%;
                max-width: 300px;
                height: calc(100vh - 70px);
                background-color: var(--primary-dark);
                flex-direction: column;
                align-items: center;
                padding-top: 3rem;
                transition: right 0.5s ease;
                box-shadow: -5px 0 15px rgba(0,0,0,0.1);
            }
            .nav-links.active {
                right: 0;
            }
            .nav-links li {
                margin: 1.2rem 0;
            }
            .header-container {
                padding: 0 15px;
            }
            .box { padding: 1.3rem; }
            .form-section { padding: 1.8rem; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            .my-logo { font-size: 1.8rem; }
            .intro { padding: 1.2rem; font-size: 1.1rem; }
            .interactive-box { grid-template-columns: 1fr; }
        }