*, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #d32f2f;
            --primary-dark: #b71c1c;
            --accent: #fdd835;
            --dark: #212121;
            --gray: #757575;
            --light: #f5f5f5;
            --white: #fff;
            --shadow: 0 2px 12px rgba(0,0,0,0.08);
        }
        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            line-height: 1.75;
            color: var(--dark);
            background: var(--light);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: var(--white);
            box-shadow: var(--shadow);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -1px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--accent);
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--primary);
        }
        nav {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        nav a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: background 0.3s, color 0.3s;
        }
        nav a:hover {
            background: var(--primary);
            color: var(--white);
        }
        .breadcrumb {
            background: var(--white);
            padding: 10px 0;
            border-bottom: 1px solid #eee;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            margin: 0 6px;
            color: var(--gray);
        }
        main {
            padding: 30px 0 50px;
        }
        .article-wrap {
            background: var(--white);
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.6rem;
            color: var(--primary-dark);
            margin-bottom: 10px;
            line-height: 1.2;
        }
        .meta {
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .meta i {
            margin-right: 5px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-dark);
            margin: 50px 0 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.1rem;
            color: var(--gray);
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
        }
        ul, ol {
            margin: 0 0 20px 20px;
        }
        li {
            margin-bottom: 8px;
        }
        .content img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 20px 0;
            box-shadow: var(--shadow);
        }
        .highlight-box {
            background: #fff8e1;
            border-left: 4px solid var(--accent);
            padding: 20px;
            border-radius: 0 8px 8px 0;
            margin: 25px 0;
        }
        .tip-box {
            background: #e8f5e9;
            border-left: 4px solid #4caf50;
            padding: 20px;
            border-radius: 0 8px 8px 0;
            margin: 25px 0;
        }
        .warning-box {
            background: #ffebee;
            border-left: 4px solid var(--primary);
            padding: 20px;
            border-radius: 0 8px 8px 0;
            margin: 25px 0;
        }
        .table-responsive {
            overflow-x: auto;
            margin: 20px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
        }
        table th, table td {
            padding: 12px;
            border: 1px solid #e0e0e0;
            text-align: left;
        }
        table th {
            background: var(--primary);
            color: var(--white);
        }
        table tr:nth-child(even) {
            background: #fafafa;
        }
        .search-section {
            background: var(--white);
            border-radius: 12px;
            padding: 30px;
            margin: 30px 0;
            box-shadow: var(--shadow);
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 500px;
            margin: 0 auto;
            gap: 10px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            padding: 12px 24px;
            background: var(--primary);
            color: var(--white);
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: var(--primary-dark);
        }
        .rating-section {
            background: var(--white);
            border-radius: 12px;
            padding: 30px;
            margin: 30px 0;
            box-shadow: var(--shadow);
        }
        .stars {
            display: flex;
            gap: 5px;
            justify-content: center;
            font-size: 2rem;
            color: #ffc107;
            cursor: pointer;
            flex-direction: row-reverse;
        }
        .stars input {
            display: none;
        }
        .stars label {
            cursor: pointer;
            transition: transform 0.2s;
        }
        .stars label:hover,
        .stars label:hover ~ label,
        .stars input:checked ~ label {
            color: #ff9800;
            transform: scale(1.1);
        }
        .comment-section {
            background: var(--white);
            border-radius: 12px;
            padding: 30px;
            margin: 30px 0;
            box-shadow: var(--shadow);
        }
        .comment-form textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 1rem;
            min-height: 100px;
            resize: vertical;
            outline: none;
            font-family: inherit;
        }
        .comment-form textarea:focus {
            border-color: var(--primary);
        }
        .comment-form input[type="text"] {
            width: 100%;
            padding: 10px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            margin: 10px 0;
            font-size: 1rem;
            outline: none;
        }
        .comment-form button {
            padding: 12px 24px;
            background: var(--primary);
            color: var(--white);
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.3s;
        }
        .comment-form button:hover {
            background: var(--primary-dark);
        }
        .sidebar {
            margin-top: 30px;
        }
        .related-card {
            background: var(--white);
            border-radius: 10px;
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: var(--shadow);
        }
        .related-card h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
        }
        .related-card a {
            color: var(--primary);
            text-decoration: none;
        }
        .related-card a:hover {
            text-decoration: underline;
        }
        footer {
            background: var(--dark);
            color: #bbb;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        footer .container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        footer h4 {
            color: var(--white);
            margin-bottom: 15px;
        }
        footer a {
            color: #bbb;
            text-decoration: none;
        }
        footer a:hover {
            color: var(--accent);
        }
        .friend-link {
            display: block;
            margin: 4px 0;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            margin-top: 30px;
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--white);
                padding: 10px;
                border-radius: 8px;
                box-shadow: var(--shadow);
                margin-top: 10px;
            }
            nav.open {
                display: flex;
            }
            .article-wrap {
                padding: 20px;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            .header-inner {
                padding: 0 10px;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .article-wrap {
                padding: 15px;
            }
        }