:root {
            --primary-color: #3a0ca3;
            --secondary-color: #4361ee;
            --accent-color: #f72585;
            --dark-bg: #1a1a2e;
            --light-bg: #f8f9fa;
            --text-dark: #212529;
            --text-light: #e9ecef;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --border-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(--text-dark);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary-color) 100%);
            color: var(--text-light);
            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;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent-color);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            color: var(--text-light);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent-color);
            transition: var(--transition);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .search-box {
            margin-left: 2rem;
            display: flex;
        }
        .search-box input {
            padding: 0.6rem 1rem;
            border: none;
            border-radius: 50px 0 0 50px;
            outline: none;
            width: 200px;
        }
        .search-box button {
            background: var(--accent-color);
            color: white;
            border: none;
            padding: 0.6rem 1.2rem;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: #d63384;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin: 0 10px;
            color: #6c757d;
        }
        .breadcrumb a {
            color: var(--primary-color);
        }
        main {
            padding: 2rem 0;
        }
        article {
            background: white;
            border-radius: var(--border-radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            color: var(--secondary-color);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--accent-color);
        }
        h3 {
            color: var(--primary-color);
            font-size: 1.5rem;
            margin: 1.8rem 0 1rem;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
        }
        .hero-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .highlight {
            background: linear-gradient(120deg, #fdf2f8 0%, #e6f7ff 100%);
            border-left: 5px solid var(--accent-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip {
            background-color: #fff3cd;
            border-left: 5px solid #ffc107;
            padding: 1rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tier-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .tier-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border-top: 6px solid;
            transition: var(--transition);
        }
        .tier-card:hover {
            transform: translateY(-10px);
        }
        .tier-s {
            border-color: #ffd700;
        }
        .tier-a {
            border-color: #c0c0c0;
        }
        .tier-b {
            border-color: #cd7f32;
        }
        .rating {
            color: #ffc107;
            margin: 0.5rem 0;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin: 3rem 0;
        }
        @media (max-width: 768px) {
            .interactive-section {
                grid-template-columns: 1fr;
            }
        }
        .comment-form, .rating-form {
            background: var(--light-bg);
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-family: inherit;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 0.2rem rgba(67, 97, 238, 0.25);
        }
        button[type="submit"] {
            background: linear-gradient(to right, var(--secondary-color), var(--primary-color));
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            display: block;
            width: 100%;
        }
        button[type="submit"]:hover {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            font-size: 2rem;
            margin: 1rem 0;
        }
        .star-rating i {
            cursor: pointer;
            color: #ddd;
            transition: var(--transition);
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #ffc107;
        }
        .footer-links {
            background: var(--dark-bg);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: rgba(255,255,255,0.05);
            padding: 1.2rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255,255,255,0.1);
            transform: translateX(5px);
        }
        .web-link a {
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        footer {
            background: #0d0d1a;
            color: var(--text-light);
            text-align: center;
            padding: 2rem 0;
        }
        .copyright {
            opacity: 0.8;
            font-size: 0.9rem;
            margin-top: 1rem;
        }
        @media (max-width: 1024px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .container { padding: 0 15px; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-links {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background: var(--dark-bg);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 3rem;
                gap: 2rem;
                transition: var(--transition);
                z-index: 999;
            }
            .nav-links.active {
                left: 0;
            }
            .search-box {
                margin-left: 0;
                margin-top: 1rem;
                width: 100%;
            }
            .search-box input {
                width: 100%;
            }
            .header-content {
                flex-wrap: wrap;
            }
            .tier-list {
                grid-template-columns: 1fr;
            }
        }