:root {
        --primary: #FF4655;
        --secondary: #1E90FF;
        --accent: #FFD700;
        --dark: #0F1933;
        --light: #F5F7FA;
        --gray: #8A94A6;
        --success: #00C853;
        --shadow: 0 4px 12px rgba(0,0,0,0.1);
        --radius: 12px;
        --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }
    * {
        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: #333;
        background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
        max-width: 1600px;
        margin: 0 auto;
        padding: 0;
        overflow-x: hidden;
    }
    a {
        color: var(--secondary);
        text-decoration: none;
        transition: var(--transition);
    }
    a:hover {
        color: var(--primary);
        text-decoration: underline;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    .container {
        width: 100%;
        padding: 0 20px;
        margin: 0 auto;
    }
    header {
        background: var(--dark);
        color: white;
        padding: 1rem 0;
        position: sticky;
        top: 0;
        z-index: 1000;
        box-shadow: var(--shadow);
    }
    .header-container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 20px;
    }
    .my-logo {
        font-family: 'Comic Sans MS', 'Chalkboard SE', cursive;
        font-size: 2.2rem;
        font-weight: 900;
        color: var(--accent);
        text-shadow: 2px 2px 0 var(--primary);
        letter-spacing: 1px;
    }
    .my-logo:hover {
        transform: scale(1.05);
        text-decoration: none;
    }
    .my-logo span {
        color: var(--secondary);
    }
    nav ul {
        display: flex;
        list-style: none;
        gap: 2rem;
    }
    nav a {
        color: white;
        font-weight: 600;
        padding: 0.5rem 1rem;
        border-radius: 25px;
        transition: var(--transition);
    }
    nav a:hover {
        background: var(--primary);
        text-decoration: none;
        transform: translateY(-2px);
    }
    .hamburger {
        display: none;
        background: none;
        border: none;
        color: white;
        font-size: 1.8rem;
        cursor: pointer;
    }
    .breadcrumb {
        background: rgba(255,255,255,0.9);
        padding: 1rem 20px;
        font-size: 0.9rem;
        border-bottom: 1px solid #ddd;
    }
    .breadcrumb a {
        color: var(--dark);
    }
    .breadcrumb a:hover {
        color: var(--primary);
    }
    .breadcrumb i {
        margin: 0 0.5rem;
        color: var(--gray);
    }
    main {
        display: grid;
        grid-template-columns: 1fr 300px;
        gap: 2.5rem;
        max-width: 1400px;
        margin: 2rem auto;
        padding: 0 20px;
    }
    article {
        background: white;
        border-radius: var(--radius);
        padding: 2.5rem;
        box-shadow: var(--shadow);
    }
    h1 {
        color: var(--dark);
        font-size: 2.8rem;
        margin-bottom: 1.5rem;
        line-height: 1.2;
        border-bottom: 4px solid var(--accent);
        padding-bottom: 1rem;
    }
    h2 {
        color: var(--primary);
        font-size: 2rem;
        margin: 2.5rem 0 1.2rem;
        padding-bottom: 0.5rem;
        border-bottom: 2px dashed var(--secondary);
    }
    h3 {
        color: var(--secondary);
        font-size: 1.5rem;
        margin: 2rem 0 1rem;
    }
    h4 {
        color: var(--dark);
        font-size: 1.2rem;
        margin: 1.5rem 0 0.8rem;
        font-weight: 600;
    }
    p {
        margin-bottom: 1.5rem;
        font-size: 1.05rem;
        text-align: justify;
    }
    .lead {
        font-size: 1.3rem;
        font-weight: 500;
        color: var(--dark);
        background: rgba(30, 144, 255, 0.05);
        padding: 1.5rem;
        border-left: 5px solid var(--secondary);
        border-radius: 0 var(--radius) var(--radius) 0;
        margin-bottom: 2.5rem;
    }
    .highlight {
        background: linear-gradient(120deg, rgba(255,212,0,0.2) 0%, rgba(255,212,0,0) 100%);
        padding: 1.2rem;
        border-radius: var(--radius);
        margin: 1.5rem 0;
        border-left: 4px solid var(--accent);
    }
    .feature-img {
        width: 100%;
        border-radius: var(--radius);
        margin: 2rem 0;
        box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        transition: var(--transition);
        border: 5px solid white;
    }
    .feature-img:hover {
        transform: translateY(-5px);
        box-shadow: 0 12px 25px rgba(0,0,0,0.2);
    }
    .img-caption {
        text-align: center;
        font-style: italic;
        color: var(--gray);
        margin-top: 0.5rem;
        font-size: 0.95rem;
    }
    blockquote {
        font-style: italic;
        font-size: 1.2rem;
        color: var(--dark);
        border-left: 4px solid var(--primary);
        padding-left: 2rem;
        margin: 2rem 0 2rem 2rem;
        background: rgba(255,70,85,0.05);
        padding: 1.5rem 2rem;
        border-radius: 0 var(--radius) var(--radius) 0;
    }
    ul, ol {
        margin-left: 2rem;
        margin-bottom: 1.5rem;
    }
    li {
        margin-bottom: 0.5rem;
    }
    strong {
        color: var(--primary);
        font-weight: 700;
    }
    .interactive-section {
        background: linear-gradient(135deg, #0F1933 0%, #1A2B4D 100%);
        color: white;
        padding: 2rem;
        border-radius: var(--radius);
        margin: 3rem 0;
    }
    .interactive-section h3 {
        color: var(--accent);
        border-bottom: none;
    }
    .form-group {
        margin-bottom: 1.5rem;
    }
    label {
        display: block;
        margin-bottom: 0.5rem;
        font-weight: 600;
    }
    input, textarea, select {
        width: 100%;
        padding: 0.8rem 1rem;
        border: 2px solid #ddd;
        border-radius: var(--radius);
        font-family: inherit;
        font-size: 1rem;
        transition: var(--transition);
    }
    input:focus, textarea:focus, select:focus {
        outline: none;
        border-color: var(--secondary);
        box-shadow: 0 0 0 3px rgba(30, 144, 255, 0.2);
    }
    button, .btn {
        background: linear-gradient(to right, var(--primary), #FF6B7D);
        color: white;
        border: none;
        padding: 0.8rem 2rem;
        border-radius: 50px;
        font-weight: 700;
        font-size: 1rem;
        cursor: pointer;
        transition: var(--transition);
        display: inline-block;
        text-align: center;
    }
    button:hover, .btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 7px 14px rgba(255,70,85,0.3);
        text-decoration: none;
    }
    .rating {
        display: flex;
        gap: 0.5rem;
        margin: 1rem 0;
    }
    .star {
        font-size: 2rem;
        color: #ddd;
        cursor: pointer;
        transition: var(--transition);
    }
    .star:hover, .star.active {
        color: var(--accent);
        transform: scale(1.2);
    }
    aside {
        background: white;
        border-radius: var(--radius);
        padding: 1.5rem;
        box-shadow: var(--shadow);
        align-self: start;
        position: sticky;
        top: 120px;
    }
    .widget {
        margin-bottom: 2.5rem;
    }
    .widget h3 {
        font-size: 1.3rem;
        color: var(--primary);
        margin-bottom: 1.2rem;
        padding-bottom: 0.5rem;
        border-bottom: 2px solid #eee;
    }
    .related-links li {
        margin-bottom: 0.8rem;
        padding-left: 0.5rem;
        border-left: 3px solid transparent;
        transition: var(--transition);
    }
    .related-links li:hover {
        border-left-color: var(--secondary);
        padding-left: 1rem;
    }
    .update-time {
        background: rgba(0,200,83,0.1);
        padding: 1rem;
        border-radius: var(--radius);
        text-align: center;
        font-size: 0.9rem;
        color: var(--dark);
        margin-top: 2rem;
    }
    .update-time i {
        color: var(--success);
        margin-right: 0.5rem;
    }
    footer {
        background: var(--dark);
        color: white;
        padding: 3rem 20px 1.5rem;
        margin-top: 4rem;
    }
    .footer-content {
        max-width: 1400px;
        margin: 0 auto;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 2.5rem;
        margin-bottom: 2rem;
    }
    friend-link {
        display: block;
        background: rgba(255,255,255,0.05);
        padding: 1rem;
        border-radius: var(--radius);
        margin-bottom: 1rem;
        transition: var(--transition);
        border: 1px solid rgba(255,255,255,0.1);
    }
    friend-link:hover {
        background: rgba(255,255,255,0.1);
        transform: translateX(5px);
        border-color: var(--secondary);
    }
    .copyright {
        text-align: center;
        padding-top: 1.5rem;
        border-top: 1px solid rgba(255,255,255,0.1);
        font-size: 0.9rem;
        color: var(--gray);
        max-width: 1400px;
        margin: 0 auto;
    }
    @media (max-width: 1024px) {
        main {
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        aside {
            position: static;
            top: auto;
        }
    }
    @media (max-width: 768px) {
        .header-container {
            flex-wrap: wrap;
        }
        nav {
            display: none;
            width: 100%;
            order: 3;
            margin-top: 1rem;
        }
        nav.active {
            display: block;
        }
        nav ul {
            flex-direction: column;
            gap: 0.5rem;
        }
        nav a {
            display: block;
            padding: 0.8rem;
            border-radius: var(--radius);
        }
        .hamburger {
            display: block;
        }
        h1 {
            font-size: 2.2rem;
        }
        h2 {
            font-size: 1.7rem;
        }
        article {
            padding: 1.5rem;
        }
        .footer-content {
            grid-template-columns: 1fr;
        }
    }