:root {
            --primary: #6a5acd;
            --primary-dark: #5649b8;
            --secondary: #ff9f43;
            --accent: #00d2d3;
            --light: #f8f9fa;
            --dark: #2d3436;
            --gray: #636e72;
            --success: #00b894;
            --danger: #d63031;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --transition: all 0.3s ease;
        }
        * {
            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(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary);
        }
        .my-logo span {
            background: linear-gradient(to right, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-desktop a {
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-desktop a:hover {
            color: var(--secondary);
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--secondary);
            transition: width 0.3s;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            background: none;
            border: none;
            color: white;
        }
        .nav-mobile {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: var(--primary-dark);
            flex-direction: column;
            padding: 1rem;
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile ul {
            list-style: none;
            width: 100%;
        }
        .nav-mobile li {
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .nav-mobile a {
            display: block;
            padding: 1rem;
            font-weight: 600;
        }
        .nav-mobile a:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--secondary);
        }
        .breadcrumb {
            background: var(--light);
            padding: 1rem 0;
            border-bottom: 1px solid #eee;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 5px;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            max-width: 900px;
        }
        .article-head {
            margin-bottom: 3rem;
            border-bottom: 2px solid var(--light);
            padding-bottom: 2rem;
        }
        .article-head h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--primary-dark);
        }
        .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--gray);
            font-size: 0.95rem;
            margin-top: 1.5rem;
        }
        .meta i {
            margin-right: 8px;
            color: var(--primary);
        }
        h1, h2, h3, h4 {
            color: var(--primary-dark);
            margin-top: 2.5rem;
            margin-bottom: 1.2rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--secondary);
            padding-left: 15px;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--dark);
        }
        h4 {
            font-size: 1.4rem;
            color: var(--gray);
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary);
            background: rgba(106, 90, 205, 0.05);
            padding: 1.5rem;
            border-radius: var(--radius);
            border-left: 4px solid var(--accent);
        }
        strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        em {
            color: var(--gray);
        }
        .highlight {
            background: linear-gradient(120deg, rgba(255, 159, 67, 0.2) 0%, rgba(255, 159, 67, 0) 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .info-card {
            background: white;
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            margin: 2rem 0;
            border-top: 4px solid var(--accent);
        }
        .info-card.warning {
            border-top-color: var(--danger);
            background: #fff5f5;
        }
        .info-card.success {
            border-top-color: var(--success);
            background: #f0fff8;
        }
        .info-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .info-card h3 i {
            color: inherit;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 2.5rem auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .article-img:hover {
            transform: scale(1.02);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .content-link {
            color: var(--primary);
            border-bottom: 1px dashed var(--primary);
            font-weight: 600;
        }
        .content-link:hover {
            color: var(--primary-dark);
            border-bottom-style: solid;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        .tier-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2.5rem 0;
            box-shadow: var(--shadow);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .tier-table th {
            background: var(--primary);
            color: white;
            padding: 1.2rem;
            text-align: left;
            font-weight: 700;
        }
        .tier-table td {
            padding: 1rem 1.2rem;
            border-bottom: 1px solid #eee;
        }
        .tier-table tr:nth-child(even) {
            background: #f9f9f9;
        }
        .tier-table tr:hover {
            background: rgba(106, 90, 205, 0.05);
        }
        .tier-badge {
            display: inline-block;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 700;
            color: white;
        }
        .tier-ss {
            background: linear-gradient(90deg, #ff9a00, #ff5e00);
        }
        .tier-s {
            background: linear-gradient(90deg, #9b59b6, #8e44ad);
        }
        .tier-a {
            background: linear-gradient(90deg, #3498db, #2980b9);
        }
        .tier-b {
            background: linear-gradient(90deg, #2ecc71, #27ae60);
        }
        .tier-c {
            background: linear-gradient(90deg, #f1c40f, #f39c12);
        }
        .sidebar {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-widget {
            background: white;
            border-radius: var(--radius);
            padding: 1.8rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-top: 0;
            margin-bottom: 1.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--light);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-widget h3 i {
            color: var(--secondary);
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.9rem 1rem;
            border: 2px solid #ddd;
            border-right: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--primary-dark);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 1.5rem 0;
            font-size: 1.8rem;
            color: #ffd700;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .rating-form button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            width: 100%;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background: #e67e22;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
            min-height: 150px;
            margin-bottom: 1rem;
            transition: var(--transition);
        }
        .comment-form textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        .comment-form button {
            background: var(--accent);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            width: 100%;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background: #00b5b5;
        }
        .site-footer {
            background: var(--dark);
            color: white;
            padding: 4rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .footer-logo span {
            color: var(--secondary);
        }
        .footer-links h4 {
            color: white;
            margin-top: 0;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 1.5rem;
            border-radius: var(--radius);
            margin: 1.5rem 0;
            border-left: 4px solid var(--accent);
        }
        friend-link a {
            color: var(--secondary);
            font-weight: 600;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #b2bec3;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-desktop {
                display: none;
            }
            .header-content {
                flex-wrap: wrap;
            }
            .my-logo {
                font-size: 1.8rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .main-content {
                padding: 2rem 0;
                gap: 2rem;
            }
            .article-head h1 {
                font-size: 2.2rem;
            }
            .tier-table {
                display: block;
                overflow-x: auto;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .content-section {
            animation: fadeIn 0.6s ease-out;
        }