:root {
            --primary: #4A6FA5;
            --secondary: #FF9900;
            --accent: #E63946;
            --light: #F8F9FA;
            --dark: #212529;
            --gray: #6C757D;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background-color: var(--light);
        }
        .header {
            background: linear-gradient(135deg, var(--primary), #2A4A7A);
            color: white;
            padding: 1rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: bold;
            color: var(--secondary);
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .my-logo:hover {
            color: white;
            transform: scale(1.05);
            transition: all 0.3s ease;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .nav {
            display: flex;
            gap: 1.5rem;
        }
        .nav a {
            color: white;
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: background 0.3s;
        }
        .nav a:hover {
            background: rgba(255,255,255,0.2);
        }
        .breadcrumb {
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #CCCCCC;
        }
        .breadcrumb a {
            color: #FFCC00;
            text-decoration: none;
        }
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 1rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        .main-content {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.08);
        }
        .sidebar {
            background: white;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.05);
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            border-left: 6px solid var(--secondary);
            padding-left: 1rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--secondary);
        }
        h3 {
            color: var(--accent);
            font-size: 1.6rem;
            margin: 2rem 0 0.8rem;
        }
        h4 {
            color: var(--gray);
            font-size: 1.3rem;
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .highlight {
            background: #FFF3CD;
            padding: 1.5rem;
            border-left: 5px solid var(--secondary);
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3em;
        }
        .link-list {
            list-style: none;
            padding: 1rem;
            background: #E9ECEF;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        .link-list li {
            margin: 0.5rem 0;
        }
        .link-list a {
            color: var(--primary);
            text-decoration: none;
            font-weight: bold;
        }
        .link-list a:hover {
            text-decoration: underline;
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #CED4DA;
            border-radius: 6px;
            font-size: 1rem;
        }
        button {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        button:hover {
            background: #E68A00;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 1.8rem;
            color: #FFD700;
            cursor: pointer;
        }
        .update-time {
            font-style: italic;
            color: var(--gray);
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #CCC;
        }
        .footer {
            background: var(--dark);
            color: white;
            padding: 2rem 1rem;
            margin-top: 3rem;
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        friend-link {
            display: block;
            margin: 0.5rem 0;
        }
        friend-link a {
            color: #4DA8DA;
            text-decoration: none;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #AAA;
        }
        @media (max-width: 768px) {
            .container {
                grid-template-columns: 1fr;
            }
            .nav-toggle {
                display: block;
            }
            .nav {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 1rem;
            }
            .nav.active {
                display: flex;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
        }