:root {
            --primary: #2c3e50;
            --accent: #e74c3c;
            --success: #27ae60;
            --bg: #f8f9fa;
            --card: #ffffff;
            --text: #2d2d2d;
            --border: #e0e0e0;
            --shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            --radius: 12px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.75;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: #c0392b;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
            padding: 18px 0;
            border-bottom: 3px solid var(--accent);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 15px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -1px;
            background: linear-gradient(90deg, #ff6b6b, #ffa502);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: none;
            display: inline-block;
        }
        .my-logo:hover {
            opacity: 0.85;
        }
        .main-nav ul {
            list-style: none;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #ecf0f1;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: 0.3s;
            background: rgba(255, 255, 255, 0.08);
        }
        .main-nav a:hover {
            background: var(--accent);
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #fff;
            cursor: pointer;
        }
        .breadcrumb {
            background: #fff;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.85rem;
        }
        .breadcrumb a {
            color: #777;
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: #bbb;
            margin: 0 6px;
        }
        .breadcrumb strong {
            color: var(--text);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 260px 1fr 300px;
            gap: 30px;
            padding: 30px 0;
            align-items: start;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .sidebar-left,
        .sidebar-right {
            position: sticky;
            top: 90px;
        }
        @media (max-width: 768px) {
            .sidebar-left,
            .sidebar-right {
                position: static;
                order: 3;
            }
        }
        .card {
            background: var(--card);
            border-radius: var(--radius);
            padding: 25px;
            box-shadow: var(--shadow);
            margin-bottom: 25px;
        }
        .card h2 {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 15px;
            border-left: 4px solid var(--accent);
            padding-left: 14px;
        }
        .card h3 {
            font-size: 1.25rem;
            margin: 20px 0 10px;
            color: #2c3e50;
        }
        .card h4 {
            font-size: 1.05rem;
            margin: 15px 0 8px;
            color: #555;
            font-style: italic;
        }
        .card p {
            margin-bottom: 14px;
        }
        .card ul,
        .card ol {
            margin-bottom: 14px;
            padding-left: 24px;
        }
        .card li {
            margin-bottom: 6px;
        }
        .info-box {
            background: #ebf5fb;
            border-left: 4px solid #2980b9;
            padding: 16px 18px;
            border-radius: 8px;
            margin: 20px 0;
        }
        .danger-box {
            background: #fdf0f0;
            border-left: 4px solid var(--accent);
            padding: 16px 18px;
            border-radius: 8px;
            margin: 20px 0;
        }
        .success-box {
            background: #eafaf1;
            border-left: 4px solid var(--success);
            padding: 16px 18px;
            border-radius: 8px;
            margin: 20px 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }
        table th,
        table td {
            padding: 12px 15px;
            border: 1px solid var(--border);
            text-align: left;
        }
        table th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        table tr:nth-child(even) {
            background: #f9f9f9;
        }
        table tr:hover {
            background: #eef7ff;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .form-group input[type="text"],
        .form-group input[type="email"],
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            transition: 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: 0.3s;
            font-size: 0.95rem;
        }
        .btn:hover {
            background: #c0392b;
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(231, 76, 60, 0.4);
        }
        .btn-success {
            background: var(--success);
        }
        .btn-success:hover {
            background: #219a52;
        }
        .search-box {
            display: flex;
            gap: 8px;
            margin: 20px 0;
        }
        .search-box input {
            flex: 1;
            padding: 12px 18px;
            border: 2px solid var(--border);
            border-radius: 30px;
            font-size: 1rem;
        }
        .search-box input:focus {
            border-color: var(--accent);
            outline: none;
        }
        .search-box button {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 12px 22px;
            cursor: pointer;
            font-size: 1rem;
        }
        .rating-stars {
            display: flex;
            gap: 4px;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ddd;
        }
        .rating-stars .star.active {
            color: #f1c40f;
        }
        .rating-stars .star:hover {
            color: #f1c40f;
            transform: scale(1.1);
        }
        .comment-item {
            background: #f9fafb;
            border-radius: 10px;
            padding: 16px;
            margin-bottom: 16px;
            border-left: 3px solid var(--accent);
        }
        .comment-item .comment-user {
            font-weight: 700;
            color: var(--primary);
        }
        .comment-item .comment-date {
            font-size: 0.8rem;
            color: #888;
        }
        friend-link {
            display: block;
            margin-top: 20px;
            padding: 15px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        friend-link .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        friend-link a {
            color: #aaa;
            font-size: 0.85rem;
            padding: 6px 14px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 20px;
        }
        friend-link a:hover {
            color: #fff;
            background: var(--accent);
        }
        .site-footer {
            background: #1a1a2e;
            color: #aaa;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .site-footer .copyright {
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 15px;
            margin-top: 20px;
            font-size: 0.85rem;
        }
        .schema-org {
            display: none;
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 5px;
            }
            .main-nav ul li {
                width: 100%;
            }
            .main-nav ul li a {
                display: block;
                text-align: center;
            }
            .hamburger {
                display: block;
            }
            .content-grid {
                grid-template-columns: 1fr;
                padding: 15px 0;
            }
            body {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 14px;
            }
            .card {
                padding: 15px;
            }
            .my-logo {
                font-size: 1.3rem;
            }
        }
        .divider {
            text-align: center;
            margin: 30px 0;
            color: #ccc;
            font-size: 1.2rem;
        }