* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #e0e0e0;
            background: #0f1419;
            background-image: radial-gradient(circle at 15% 50%, rgba(32, 40, 60, 0.15) 0%, transparent 55%), radial-gradient(circle at 85% 30%, rgba(20, 70, 100, 0.1) 0%, transparent 55%);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        @media (min-width: 992px) {
            .main-grid { grid-template-columns: 1fr 300px; }
        }
        .site-header {
            background: rgba(15, 20, 25, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #2a3a50;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 1rem 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Arial Black', Impact, sans-serif;
            font-size: 1.8rem;
            background: linear-gradient(90deg, #00b4d8, #0077b6, #0096c7);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #00b4d8; }
        .main-nav { display: flex; align-items: center; }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-links a {
            color: #b0b8c5;
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 0;
            position: relative;
            transition: color 0.3s;
        }
        .nav-links a:hover, .nav-links a.active { color: #00b4d8; }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #00b4d8;
            transition: width 0.3s;
        }
        .nav-links a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #b0b8c5;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-links {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background: rgba(20, 28, 38, 0.98);
                backdrop-filter: blur(15px);
                width: 280px;
                height: calc(100vh - 70px);
                padding: 2rem;
                border-left: 1px solid #2a3a50;
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                gap: 1.5rem;
                overflow-y: auto;
            }
            .nav-links.active { right: 0; }
        }
        .breadcrumb {
            padding: 1rem 0 0.5rem;
            font-size: 0.9rem;
            color: #8a9aad;
        }
        .breadcrumb a { color: #8a9aad; text-decoration: none; }
        .breadcrumb a:hover { color: #00b4d8; text-decoration: underline; }
        .breadcrumb span { margin: 0 8px; color: #4a5a6d; }
        .content-area { padding: 2rem 0; }
        article { background: rgba(22, 28, 36, 0.7); border-radius: 12px; padding: 2.5rem; border: 1px solid #2a3a50; }
        h1, h2, h3, h4 {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            color: #ffffff;
            line-height: 1.3;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        h1 {
            font-size: 2.8rem;
            background: linear-gradient(90deg, #ffffff, #00b4d8);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            border-bottom: 2px solid #2a3a50;
            padding-bottom: 1rem;
        }
        h2 { font-size: 2rem; color: #00b4d8; padding-bottom: 0.5rem; border-bottom: 1px solid #2a3a50; }
        h3 { font-size: 1.6rem; color: #4cc9f0; }
        h4 { font-size: 1.3rem; color: #90e0ef; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; }
        .lead { font-size: 1.3rem; color: #caf0f8; font-weight: 300; margin-bottom: 2rem; }
        .highlight { background: rgba(0, 180, 216, 0.15); border-left: 4px solid #00b4d8; padding: 1.5rem; margin: 2rem 0; border-radius: 0 8px 8px 0; }
        .key-point { display: flex; align-items: flex-start; gap: 15px; margin: 1.5rem 0; }
        .key-point i { color: #00b4d8; margin-top: 5px; flex-shrink: 0; }
        .data-card {
            background: linear-gradient(145deg, #1a2535, #151f2b);
            border: 1px solid #2a3a50;
            border-radius: 10px;
            padding: 1.8rem;
            margin: 2rem 0;
            box-shadow: 0 8px 25px rgba(0, 10, 30, 0.3);
        }
        .chart-placeholder {
            background: #1a2535;
            border: 2px dashed #2a3a50;
            border-radius: 8px;
            height: 350px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #8a9aad;
            font-style: italic;
            margin: 2rem 0;
        }
        a.content-link {
            color: #4cc9f0;
            text-decoration: none;
            border-bottom: 1px dotted #4cc9f0;
            transition: color 0.3s, border-bottom 0.3s;
        }
        a.content-link:hover { color: #90e0ef; border-bottom: 1px solid #90e0ef; }
        blockquote {
            font-style: italic;
            color: #b0b8c5;
            border-left: 4px solid #0077b6;
            padding-left: 1.5rem;
            margin: 2rem 0;
        }
        ul, ol { padding-left: 2rem; margin-bottom: 1.5rem; }
        li { margin-bottom: 0.5rem; }
        strong { color: #ffffff; font-weight: 700; }
        .sidebar {
            background: rgba(22, 28, 36, 0.7);
            border-radius: 12px;
            padding: 2rem;
            border: 1px solid #2a3a50;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .widget { margin-bottom: 2.5rem; }
        .widget-title {
            font-size: 1.3rem;
            color: #00b4d8;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #2a3a50;
        }
        .search-form { display: flex; margin-bottom: 1.5rem; }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1rem;
            background: #1a2535;
            border: 1px solid #2a3a50;
            border-radius: 8px 0 0 8px;
            color: #e0e0e0;
            font-size: 1rem;
        }
        .search-btn {
            background: linear-gradient(90deg, #0077b6, #0096c7);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-btn:hover { background: linear-gradient(90deg, #0096c7, #00b4d8); }
        .link-list { list-style: none; padding-left: 0; }
        .link-list li { margin-bottom: 0.8rem; }
        .link-list a {
            color: #b0b8c5;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color 0.3s;
            padding: 0.5rem;
            border-radius: 6px;
        }
        .link-list a:hover {
            color: #00b4d8;
            background: rgba(0, 180, 216, 0.1);
        }
        .interaction-module {
            background: rgba(22, 28, 36, 0.7);
            border-radius: 12px;
            padding: 2rem;
            border: 1px solid #2a3a50;
            margin: 3rem 0;
        }
        .module-title { color: #00b4d8; margin-bottom: 1.5rem; }
        .rating-wrapper {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        .stars { display: flex; gap: 5px; }
        .star { color: #4a5a6d; font-size: 1.8rem; cursor: pointer; transition: color 0.2s; }
        .star:hover, .star.active { color: #ffc107; }
        .comment-form textarea, .comment-form input {
            width: 100%;
            padding: 1rem;
            margin-bottom: 1rem;
            background: #1a2535;
            border: 1px solid #2a3a50;
            border-radius: 8px;
            color: #e0e0e0;
            font-size: 1rem;
            font-family: inherit;
        }
        .form-row { display: flex; gap: 1rem; }
        .form-row input { flex: 1; }
        .submit-btn {
            background: linear-gradient(90deg, #0077b6, #0096c7);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: background 0.3s, transform 0.2s;
        }
        .submit-btn:hover {
            background: linear-gradient(90deg, #0096c7, #00b4d8);
            transform: translateY(-2px);
        }
        .site-footer {
            background: #0a0f14;
            border-top: 1px solid #2a3a50;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-logo { font-size: 1.8rem; margin-bottom: 1rem; }
        friend-link {
            display: block;
            background: rgba(32, 40, 60, 0.5);
            border: 1px solid #2a3a50;
            border-radius: 8px;
            padding: 1.5rem;
            margin-top: 2rem;
        }
        friend-link h3 { margin-top: 0; }
        friend-link ul { list-style: none; padding-left: 0; }
        friend-link li { margin-bottom: 0.8rem; }
        friend-link a {
            color: #8a9aad;
            text-decoration: none;
            transition: color 0.3s;
        }
        friend-link a:hover { color: #00b4d8; }
        .copyright {
            text-align: center;
            color: #6b7b95;
            font-size: 0.9rem;
            padding-top: 1.5rem;
            border-top: 1px solid #2a3a50;
        }