:root {
            --primary: #5E35B1;
            --secondary: #FF6F00;
            --dark: #1a1a2e;
            --light: #f8f9fa;
            --grey: #6c757d;
            --accent: #00b4d8;
            --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.75;
            color: #2d2d2d;
            background: #fcfcfc;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .top-bar {
            background: var(--dark);
            color: #fff;
            font-size: 0.85rem;
            padding: 8px 0;
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .top-bar a {
            color: #ccc;
            margin-right: 12px;
        }
        .top-bar a:hover {
            color: #fff;
        }
        .site-header {
            background: var(--bg-gradient);
            padding: 18px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            position: relative;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo span {
            color: var(--secondary);
        }
        .my-logo:hover {
            text-decoration: none;
            color: #fff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 1.8rem;
            color: #fff;
            padding: 5px;
        }
        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            padding: 8px 10px;
            border-radius: 4px;
            transition: background 0.3s;
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            text-decoration: none;
        }
        .breadcrumb-bar {
            background: #f1f1f1;
            padding: 10px 0;
            font-size: 0.85rem;
        }
        .breadcrumb-bar .container {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb-bar a {
            color: var(--grey);
        }
        .breadcrumb-bar span {
            color: var(--dark);
            font-weight: 600;
        }
        .content-wrap {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
            margin: 40px auto;
        }
        @media (max-width: 992px) {
            .content-wrap {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: #fff;
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        @media (max-width: 992px) {
            .sidebar {
                position: static;
            }
        }
        .article-body h1 {
            font-size: 2.6rem;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 15px;
            font-weight: 800;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 15px;
        }
        .article-body h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin: 40px 0 20px;
            font-weight: 700;
            position: relative;
            padding-left: 15px;
            border-left: 4px solid var(--secondary);
        }
        .article-body h3 {
            font-size: 1.3rem;
            color: var(--dark);
            margin: 25px 0 15px;
            font-weight: 600;
        }
        .article-body h4 {
            font-size: 1.05rem;
            color: var(--grey);
            margin: 18px 0 10px;
            font-weight: 600;
            font-style: italic;
        }
        .article-body p {
            margin-bottom: 16px;
            font-size: 1.02rem;
        }
        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 25px 0;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }
        .meta-line {
            color: var(--grey);
            font-size: 0.85rem;
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eee;
        }
        .meta-line i {
            margin-right: 5px;
        }
        .callout-box {
            background: #f0f4ff;
            border-left: 4px solid var(--primary);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .pro-tip {
            background: #fff9f0;
            border-left: 4px solid var(--secondary);
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: var(--light);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
        }
        .stat-card .number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
        }
        .form-section {
            background: var(--light);
            border-radius: 10px;
            padding: 25px;
            margin: 30px 0;
            border: 1px solid #e9ecef;
        }
        .form-section h3 {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 15px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 5px;
            font-size: 0.9rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-size: 1rem;
            font-family: inherit;
            transition: border-color 0.3s, box-shadow 0.3s;
            background: #fff;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(94, 53, 177, 0.15);
        }
        .btn {
            display: inline-block;
            padding: 10px 28px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
            color: #fff;
            text-decoration: none;
        }
        .rating-stars {
            font-size: 1.5rem;
            color: #ffc107;
            cursor: pointer;
            letter-spacing: 5px;
        }
        .rating-stars i {
            transition: color 0.3s;
        }
        .rating-stars i:hover {
            color: var(--secondary);
        }
        .table-responsive {
            overflow-x: auto;
            margin: 25px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            background: #fff;
        }
        table th,
        table td {
            padding: 12px 15px;
            border: 1px solid #dee2e6;
            text-align: left;
            font-size: 0.9rem;
        }
        table th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            font-size: 0.8rem;
        }
        table tr:nth-child(even) {
            background: #f8f9fa;
        }
        table tr:hover {
            background: #f0f4ff;
        }
        .site-footer {
            background: var(--dark);
            color: #ccc;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .site-footer .logo-footer {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .site-footer h4 {
            color: #fff;
            margin-bottom: 15px;
            font-size: 1rem;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer a {
            color: #aaa;
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid #333;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #999;
        }
        friend-link {
            display: block;
            margin: 20px 0;
            font-size: 0.9rem;
        }
        friend-link a {
            margin-right: 15px;
            color: var(--secondary);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--primary);
                margin-top: 15px;
                padding: 15px;
                border-radius: 8px;
                gap: 10px;
            }
            .nav-menu.open {
                display: flex;
            }
            .site-header .container {
                flex-wrap: wrap;
            }
            .article-body {
                padding: 20px;
            }
            .article-body h1 {
                font-size: 1.8rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
        }
        .faq-item {
            margin-bottom: 20px;
        }
        .faq-item h4 {
            color: var(--primary);
        }
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 20px 0;
        }
        .tag {
            background: #e9ecef;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--dark);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
        }