:root {
            --primary-dark: #1a1a2e;
            --primary-accent: #ff6b35;
            --secondary-accent: #00a8cc;
            --text-light: #f0f0f0;
            --text-dim: #b0b0b0;
            --card-bg: #16213e;
            --section-padding: clamp(2rem, 5vw, 4rem);
            --container-width: min(1200px, 95vw);
        }
        * {
            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: var(--text-light);
            background: linear-gradient(135deg, var(--primary-dark) 0%, #0f3460 100%);
            background-attachment: fixed;
        }
        a {
            color: var(--secondary-accent);
            text-decoration: none;
            transition: color 0.3s ease, text-shadow 0.3s ease;
        }
        a:hover {
            color: var(--primary-accent);
            text-shadow: 0 0 8px rgba(255, 107, 53, 0.5);
        }
        .container {
            width: var(--container-width);
            margin: 0 auto;
            padding: 0 1rem;
        }
        .site-header {
            background-color: rgba(26, 26, 46, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid var(--primary-accent);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            background: linear-gradient(90deg, var(--primary-accent), var(--secondary-accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary-accent);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--text-light);
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: rgba(15, 52, 96, 0.7);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--text-dim);
        }
        .main-content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: var(--section-padding) 0;
        }
        @media (max-width: 992px) {
            .main-content-area {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: rgba(22, 33, 62, 0.8);
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            border: 1px solid rgba(255, 107, 53, 0.2);
        }
        h1 {
            font-size: clamp(2.5rem, 5vw, 3.5rem);
            margin-bottom: 1.5rem;
            color: var(--primary-accent);
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary-accent);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            color: var(--secondary-accent);
            padding-left: 0.5rem;
            border-left: 5px solid var(--primary-accent);
        }
        h3 {
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
            color: var(--text-light);
        }
        h4 {
            font-size: 1.2rem;
            margin: 1.5rem 0 0.75rem;
            color: var(--text-dim);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 300;
            color: var(--text-dim);
            margin-bottom: 2rem;
            padding: 1rem;
            background: rgba(0, 168, 204, 0.1);
            border-left: 4px solid var(--secondary-accent);
        }
        strong {
            color: var(--primary-accent);
            font-weight: 700;
        }
        em {
            color: #ffd166;
            font-style: italic;
        }
        blockquote {
            border-left: 4px solid var(--primary-accent);
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            background: rgba(255, 107, 53, 0.05);
            padding: 1.5rem;
            border-radius: 0 10px 10px 0;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .internal-link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 2rem 0;
            padding: 1.5rem;
            background: rgba(22, 33, 62, 0.9);
            border-radius: 10px;
        }
        .internal-link-list a {
            background: rgba(0, 168, 204, 0.2);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            border: 1px solid var(--secondary-accent);
        }
        .internal-link-list a:hover {
            background: rgba(255, 107, 53, 0.2);
            border-color: var(--primary-accent);
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            border: 3px solid var(--primary-accent);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-dim);
            margin-top: 0.5rem;
            margin-bottom: 2rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: rgba(22, 33, 62, 0.9);
            padding: 1.5rem;
            border-radius: 10px;
            border: 1px solid rgba(0, 168, 204, 0.3);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-top: 0;
            color: var(--primary-accent);
            border-bottom: 2px solid;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.75rem 1rem;
            border: 2px solid var(--secondary-accent);
            background: rgba(255, 255, 255, 0.1);
            border-radius: 25px 0 0 25px;
            color: var(--text-light);
            font-size: 1rem;
        }
        .search-form button {
            background: var(--secondary-accent);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 25px 25px 0;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .search-form button:hover {
            background: var(--primary-accent);
        }
        .user-interaction {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px dashed var(--primary-accent);
        }
        .rating-form, .comment-form {
            background: rgba(22, 33, 62, 0.9);
            padding: 2rem;
            border-radius: 10px;
            margin-bottom: 2rem;
        }
        .rating-form h3, .comment-form h3 {
            color: var(--primary-accent);
            margin-top: 0;
        }
        .star-rating {
            direction: rtl;
            display: inline-block;
            margin: 1rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ccc;
            font-size: 2rem;
            padding: 0 0.1rem;
            cursor: pointer;
            transition: color 0.3s;
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #ffc107;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 2px solid rgba(0, 168, 204, 0.5);
            background: rgba(255, 255, 255, 0.1);
            border-radius: 5px;
            color: var(--text-light);
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary-accent);
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(90deg, var(--primary-accent), #ff8e53);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 25px;
            cursor: pointer;
            font-weight: bold;
            font-size: 1.1rem;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(255, 107, 53, 0.4);
        }
        .site-footer {
            background-color: rgba(15, 25, 45, 0.95);
            padding: var(--section-padding) 0 2rem;
            margin-top: 3rem;
            border-top: 3px solid var(--primary-accent);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-section h4 {
            color: var(--secondary-accent);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.75rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-dim);
            font-size: 0.9rem;
        }
        .update-time {
            background: rgba(255, 107, 53, 0.1);
            padding: 0.5rem 1rem;
            border-radius: 5px;
            display: inline-block;
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                position: fixed;
                top: 70px;
                left: -100%;
                flex-direction: column;
                background-color: var(--card-bg);
                width: 100%;
                text-align: center;
                padding: 2rem 0;
                transition: left 0.5s ease;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
                z-index: 999;
            }
            .main-nav.active ul {
                left: 0;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                font-size: 1.2rem;
            }
            .header-container {
                padding: 0.75rem 0;
            }
            article {
                padding: 1.5rem;
            }
            .main-content-area {
                gap: 2rem;
            }
        }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }