* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #00bcd4;
            --primary-dark: #0097a7;
            --secondary: #ff5722;
            --accent: #ffc107;
            --bg: #0f1923;
            --bg-card: #1a2a3a;
            --bg-light: #1e3347;
            --text: #e0f2f1;
            --text-muted: #90a4ae;
            --border: #2a4055;
            --radius: 12px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #0a1628 0%, #1a2a3a 100%);
            border-bottom: 2px solid var(--primary);
            padding: 12px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(0, 188, 212, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 28px;
            font-weight: 900;
            text-decoration: none;
            background: linear-gradient(135deg, #00bcd4, #ff5722);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .my-logo small {
            font-size: 14px;
            font-weight: 400;
            -webkit-text-fill-color: var(--text-muted);
            color: var(--text-muted);
            display: block;
            letter-spacing: 1px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 28px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: rgba(0, 188, 212, 0.15);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: var(--text-muted);
            text-decoration: none;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.25s ease;
            position: relative;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }
        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 60%;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
            background: rgba(0, 188, 212, 0.08);
        }
        .breadcrumb {
            padding: 14px 0 6px;
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .breadcrumb span {
            color: var(--text-muted);
        }
        .breadcrumb .sep {
            margin: 0 4px;
        }
        .hero {
            padding: 40px 0 30px;
            text-align: center;
        }
        .hero h1 {
            font-size: clamp(28px, 5vw, 52px);
            font-weight: 900;
            background: linear-gradient(135deg, #00bcd4, #ff5722, #ffc107);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .hero p {
            font-size: clamp(16px, 2vw, 22px);
            color: var(--text-muted);
            max-width: 780px;
            margin: 0 auto 20px;
        }
        .hero .meta-badge {
            display: inline-flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
            font-size: 14px;
            color: var(--text-muted);
            background: var(--bg-card);
            padding: 10px 24px;
            border-radius: 40px;
            border: 1px solid var(--border);
        }
        .hero .meta-badge i {
            color: var(--primary);
            margin-right: 6px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 20px 0 40px;
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .main-content h2 {
            font-size: clamp(22px, 3vw, 32px);
            color: var(--primary);
            margin: 40px 0 16px;
            border-left: 4px solid var(--secondary);
            padding-left: 16px;
        }
        .main-content h2:first-child {
            margin-top: 0;
        }
        .main-content h3 {
            font-size: clamp(18px, 2vw, 24px);
            color: var(--accent);
            margin: 32px 0 12px;
        }
        .main-content h4 {
            font-size: 17px;
            color: var(--text);
            margin: 24px 0 10px;
            font-weight: 600;
            opacity: 0.9;
        }
        .main-content p {
            margin-bottom: 16px;
            color: #cfdcdb;
        }
        .main-content ul,
        .main-content ol {
            margin: 12px 0 20px 24px;
            color: #cfdcdb;
        }
        .main-content li {
            margin-bottom: 8px;
        }
        .main-content img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            margin: 24px 0 12px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
            display: block;
        }
        .main-content .img-caption {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            margin-top: -8px;
            margin-bottom: 20px;
        }
        .main-content blockquote {
            border-left: 4px solid var(--secondary);
            background: rgba(255, 87, 34, 0.08);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: #d4e3e1;
        }
        .main-content a {
            color: var(--primary);
            text-decoration: none;
            border-bottom: 1px dotted var(--primary);
            transition: all 0.2s;
        }
        .main-content a:hover {
            color: var(--secondary);
            border-bottom-color: var(--secondary);
        }
        .main-content .highlight-box {
            background: rgba(0, 188, 212, 0.06);
            border: 1px solid rgba(0, 188, 212, 0.2);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin: 24px 0;
        }
        .main-content .highlight-box i {
            color: var(--primary);
            margin-right: 8px;
        }
        .main-content .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 16px;
            margin: 20px 0;
        }
        .main-content .stat-card {
            background: var(--bg-light);
            border-radius: 10px;
            padding: 16px;
            text-align: center;
            border: 1px solid var(--border);
        }
        .main-content .stat-card .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            display: block;
        }
        .main-content .stat-card .label {
            font-size: 13px;
            color: var(--text-muted);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 14px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 10px;
        }
        .sidebar-card ul {
            list-style: none;
        }
        .sidebar-card ul li {
            margin-bottom: 10px;
        }
        .sidebar-card ul li a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.2s;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
        }
        .sidebar-card ul li a i {
            width: 18px;
            color: var(--primary);
            font-size: 13px;
        }
        .search-form {
            display: flex;
            gap: 8px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: var(--bg-light);
            color: var(--text);
            font-size: 14px;
            outline: none;
            transition: border 0.3s;
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            padding: 12px 18px;
            border: none;
            border-radius: 8px;
            background: var(--primary);
            color: #0f1923;
            font-weight: 700;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: var(--secondary);
        }
        .feedback-section {
            margin-top: 40px;
            padding-top: 30px;
            border-top: 2px solid var(--border);
        }
        .feedback-section h3 {
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .feedback-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        @media(max-width:600px) {
            .feedback-grid {
                grid-template-columns: 1fr;
            }
        }
        .feedback-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--border);
        }
        .feedback-card h4 {
            font-size: 16px;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .feedback-card form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feedback-card input,
        .feedback-card textarea,
        .feedback-card select {
            padding: 10px 14px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: var(--bg);
            color: var(--text);
            font-size: 14px;
            font-family: var(--font);
            outline: none;
            transition: border 0.3s;
        }
        .feedback-card input:focus,
        .feedback-card textarea:focus,
        .feedback-card select:focus {
            border-color: var(--primary);
        }
        .feedback-card textarea {
            min-height: 80px;
            resize: vertical;
        }
        .feedback-card .stars {
            display: flex;
            gap: 6px;
            font-size: 22px;
            color: var(--accent);
            cursor: pointer;
        }
        .feedback-card .stars i {
            transition: transform 0.2s;
        }
        .feedback-card .stars i:hover {
            transform: scale(1.3);
        }
        .feedback-card .btn-submit {
            padding: 12px;
            border: none;
            border-radius: 8px;
            background: var(--secondary);
            color: #fff;
            font-weight: 700;
            cursor: pointer;
            transition: background 0.3s;
            font-size: 15px;
        }
        .feedback-card .btn-submit:hover {
            background: #e64a19;
        }
        footer {
            background: linear-gradient(135deg, #0a1628, #1a2a3a);
            border-top: 2px solid var(--border);
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
        }
        @media(max-width:768px) {
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-brand .my-logo {
            font-size: 24px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            margin-top: 10px;
            max-width: 360px;
        }
        .footer-links h4 {
            color: var(--primary);
            font-size: 16px;
            margin-bottom: 12px;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links ul li {
            margin-bottom: 8px;
        }
        .footer-links ul li a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.2s;
        }
        .footer-links ul li a:hover {
            color: var(--primary);
        }
        friend-link {
            display: block;
            padding: 16px 0 8px;
            font-size: 14px;
            color: var(--text-muted);
        }
        friend-link a {
            color: var(--text-muted);
            text-decoration: none;
            margin: 0 12px 0 0;
            transition: color 0.2s;
        }
        friend-link a:hover {
            color: var(--primary);
        }
        .copyright {
            text-align: center;
            padding-top: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .copyright a {
            color: var(--primary);
            text-decoration: none;
        }
        @media(max-width:768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0 4px;
                gap: 4px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 10px 16px;
                border-radius: 6px;
            }
            .header-inner {
                align-items: center;
            }
            .main-content {
                padding: 20px 16px;
            }
            .sidebar {
                order: 2;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .main-content>* {
            animation: fadeUp 0.5s ease forwards;
        }
        .main-content>*:nth-child(2) {
            animation-delay: 0.05s;
        }
        .main-content>*:nth-child(3) {
            animation-delay: 0.1s;
        }