:root {
            --primary-red: #e10600;
            --dark-bg: #0f0f0f;
            --light-bg: #f8f8f8;
            --text-dark: #1f1f1f;
            --text-light: #e0e0e0;
            --accent-gold: #ffd700;
            --border-grey: #333;
            --transition-speed: 0.3s;
        }
        * {
            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: var(--text-dark);
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        .site-header {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary-red);
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: -1px;
            transition: color var(--transition-speed);
        }
        .my-logo:hover {
            color: var(--accent-gold);
            text-shadow: 0 0 8px rgba(255, 215, 0, 0.5);
        }
        .my-logo span {
            color: white;
            font-weight: 300;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0;
            position: relative;
            transition: color var(--transition-speed);
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--primary-red);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-red);
            transition: width var(--transition-speed);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #222;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin: 0 10px;
            color: #777;
        }
        .breadcrumb a {
            color: #aaa;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--primary-red);
        }
        .container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        main {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
        }
        aside {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1, h2, h3, h4 {
            font-family: 'Arial', sans-serif;
            font-weight: 800;
            color: var(--dark-bg);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        h1 {
            font-size: 3.2rem;
            color: var(--primary-red);
            border-bottom: 4px solid var(--primary-red);
            padding-bottom: 1rem;
            margin-top: 0;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--dark-bg);
            border-left: 5px solid var(--primary-red);
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #333;
        }
        h4 {
            font-size: 1.4rem;
            color: #555;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        strong {
            color: var(--primary-red);
            font-weight: 700;
        }
        em {
            color: #555;
        }
        .intro {
            font-size: 1.3rem;
            font-weight: 600;
            color: #333;
            background: linear-gradient(90deg, rgba(225, 6, 0, 0.1) 0%, transparent 100%);
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 2.5rem;
        }
        .article-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            transition: transform var(--transition-speed);
        }
        .article-img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -1rem;
            margin-bottom: 2rem;
        }
        a {
            color: var(--primary-red);
            text-decoration: none;
            font-weight: 600;
        }
        a:hover {
            text-decoration: underline;
            color: #b80500;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .tip-box, .data-box, .interview-box {
            border-left: 4px solid;
            padding: 1.5rem;
            margin: 2rem 0;
            background-color: #f9f9f9;
            border-radius: 0 8px 8px 0;
        }
        .tip-box {
            border-color: var(--accent-gold);
        }
        .data-box {
            border-color: #0099ff;
        }
        .interview-box {
            border-color: #00cc66;
        }
        .user-interaction {
            background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
            color: white;
            padding: 2.5rem;
            border-radius: 12px;
            margin: 3rem 0;
        }
        .user-interaction h3 {
            color: white;
            border-left: none;
            padding-left: 0;
        }
        .interaction-form {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem 1rem;
            border: 2px solid #444;
            border-radius: 6px;
            background-color: #333;
            color: white;
            font-size: 1rem;
            transition: border-color var(--transition-speed);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary-red);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            cursor: pointer;
            margin-bottom: 1rem;
        }
        .star-rating .star {
            color: #555;
            transition: color var(--transition-speed), transform var(--transition-speed);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: var(--accent-gold);
            transform: scale(1.2);
        }
        .btn {
            background-color: var(--primary-red);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: background-color var(--transition-speed), transform var(--transition-speed);
            justify-self: start;
        }
        .btn:hover {
            background-color: #b80500;
            transform: translateY(-3px);
            text-decoration: none;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #eee;
        }
        .sidebar-widget:last-child {
            border-bottom: none;
        }
        .sidebar-widget h4 {
            color: var(--primary-red);
            margin-top: 0;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        .related-links {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 1rem;
            padding-left: 1rem;
            border-left: 3px solid transparent;
            transition: border-color var(--transition-speed);
        }
        .related-links li:hover {
            border-left-color: var(--primary-red);
        }
        .update-time {
            font-size: 0.9rem;
            color: #777;
            background: #f5f5f5;
            padding: 1rem;
            border-radius: 6px;
        }
        footer {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: 3rem 2rem 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: 2.5rem;
        }
        .footer-section h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-red);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: color var(--transition-speed);
        }
        .footer-links a:hover {
            color: var(--primary-red);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: #222;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        friend-link a {
            color: var(--accent-gold);
            font-weight: 700;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            color: #999;
            font-size: 0.9rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .main-nav {
                order: 3;
                flex-basis: 100%;
                margin-top: 1rem;
                display: none;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            main, .container {
                padding: 1.5rem;
            }
            .user-interaction {
                padding: 1.5rem;
            }
        }