:root {
            --primary-color: #2c5aa0;
            --secondary-color: #e63946;
            --accent-color: #ffbe0b;
            --text-dark: #1d3557;
            --text-light: #f1faee;
            --bg-light: #f8f9fa;
            --bg-card: #ffffff;
            --border-radius: 12px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
            padding-top: 80px;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        header {
            background-color: var(--bg-card);
            box-shadow: var(--shadow);
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
        }
        .header-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent-color);
            transition: width 0.3s;
        }
        nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
        }
        .breadcrumb {
            max-width: 1280px;
            margin: 20px auto;
            padding: 0 20px;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: var(--text-dark);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #aaa;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 20px;
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        .main-content {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--accent-color);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--text-dark);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--primary-color);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--secondary-color);
            font-weight: 600;
            margin-bottom: 2rem;
            padding-left: 20px;
            border-left: 5px solid var(--accent-color);
        }
        .highlight {
            background-color: #fff9db;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--accent-color);
            margin: 2rem 0;
        }
        .quote {
            font-style: italic;
            padding: 2rem;
            background-color: #f0f7ff;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            position: relative;
        }
        .quote::before {
            content: '"';
            font-size: 5rem;
            color: var(--accent-color);
            position: absolute;
            top: -20px;
            left: 10px;
            opacity: 0.3;
        }
        .quote-author {
            text-align: right;
            font-weight: bold;
            color: var(--primary-color);
            margin-top: 1rem;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 2rem 0;
            display: block;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -1.5rem;
            margin-bottom: 2rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .sidebar h3 {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .link-list {
            list-style: none;
        }
        .link-list li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #eee;
        }
        .link-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
        }
        .link-list a:hover {
            color: var(--secondary-color);
            transform: translateX(5px);
        }
        .form-container {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--shadow);
            margin-top: 40px;
        }
        .form-title {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 14px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
        }
        button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: var(--border-radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        button:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(230, 57, 70, 0.2);
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--accent-color);
        }
        footer {
            background-color: var(--text-dark);
            color: var(--text-light);
            padding: 50px 20px 20px;
            margin-top: 60px;
        }
        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 20px;
            border-radius: var(--border-radius);
            margin-top: 30px;
            text-align: center;
        }
        friend-link a {
            color: var(--accent-color);
            font-weight: bold;
            font-size: 1.1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #e7f4e4;
            padding: 15px;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 768px) {
            nav ul {
                display: none;
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background: var(--bg-card);
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                text-align: center;
            }
            nav ul.show {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .main-content {
                padding: 25px;
            }
            .header-container, .breadcrumb, .container {
                padding-left: 15px;
                padding-right: 15px;
            }
        }
        .tooltip {
            position: relative;
            border-bottom: 1px dotted var(--primary-color);
            cursor: help;
        }
        .tooltip-text {
            visibility: hidden;
            width: 250px;
            background-color: var(--text-dark);
            color: white;
            text-align: center;
            border-radius: var(--border-radius);
            padding: 10px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.9rem;
            font-weight: normal;
        }
        .tooltip:hover .tooltip-text {
            visibility: visible;
            opacity: 1;
        }
        .stat-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 2.5rem 0;
        }
        .stat {
            background: linear-gradient(135deg, var(--primary-color), #4a7bc8);
            color: white;
            padding: 25px;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: var(--shadow);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            display: block;
        }
        .stat-label {
            font-size: 1rem;
            opacity: 0.9;
        }