*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #d32f2f;
            --primary-dark: #b71c1c;
            --secondary: #212121;
            --accent: #ffb300;
            --bg: #f5f5f5;
            --card-bg: #ffffff;
            --text: #212121;
            --text-light: #616161;
            --border: #e0e0e0;
            --radius: 12px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 clamp(16px, 5vw, 40px);
        }
        .site-header {
            background: var(--secondary);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: clamp(1.2rem, 4vw, 1.8rem);
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            color: var(--accent);
            font-size: 1.6em;
        }
        .my-logo:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .main-nav {
            display: flex;
            gap: clamp(4px, 1.5vw, 24px);
            align-items: center;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #eee;
            font-weight: 500;
            font-size: 0.92rem;
            padding: 6px 12px;
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
            text-decoration: none;
        }
        .main-nav a i {
            margin-right: 6px;
            font-size: 0.85em;
        }
        .breadcrumb {
            background: #fff;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.88rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 6px 12px;
            align-items: center;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 12px;
            color: var(--text-light);
            font-weight: 700;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }
        .hero {
            padding: 48px 0 32px;
            text-align: center;
            background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 100%);
            color: #fff;
            border-bottom: 4px solid var(--accent);
        }
        .hero h1 {
            font-size: clamp(2rem, 6vw, 3.6rem);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 16px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .hero p {
            font-size: clamp(1rem, 2.5vw, 1.25rem);
            max-width: 720px;
            margin: 0 auto 20px;
            opacity: 0.9;
            color: #ddd;
        }
        .hero .meta-info {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 0.95rem;
            color: #bbb;
        }
        .hero .meta-info i {
            margin-right: 6px;
            color: var(--accent);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            padding: 40px 0 60px;
        }
        @media (min-width: 1024px) {
            .content-wrapper {
                grid-template-columns: 1fr 300px;
            }
        }
        .main-content {
            min-width: 0;
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar .card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
        }
        .sidebar .card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            border-bottom: 3px solid var(--primary);
            padding-bottom: 8px;
            display: inline-block;
        }
        .sidebar .card ul {
            list-style: none;
        }
        .sidebar .card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar .card ul li:last-child {
            border-bottom: none;
        }
        .sidebar .card ul li a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text);
            font-weight: 500;
        }
        .sidebar .card ul li a:hover {
            color: var(--primary);
        }
        .sidebar .card ul li a i {
            color: var(--primary);
            font-size: 0.8em;
            width: 20px;
        }
        .article {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: clamp(24px, 4vw, 48px);
            box-shadow: var(--shadow);
        }
        .article h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-top: 48px;
            margin-bottom: 16px;
            color: var(--secondary);
            border-left: 6px solid var(--primary);
            padding-left: 16px;
        }
        .article h2:first-of-type {
            margin-top: 0;
        }
        .article h3 {
            font-size: clamp(1.2rem, 2vw, 1.6rem);
            font-weight: 700;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--secondary);
        }
        .article h4 {
            font-size: clamp(1rem, 1.5vw, 1.2rem);
            font-weight: 600;
            margin-top: 24px;
            margin-bottom: 8px;
            color: var(--text-light);
        }
        .article p {
            margin-bottom: 18px;
            font-size: 1.02rem;
            color: #333;
        }
        .article ul,
        .article ol {
            margin-bottom: 20px;
            padding-left: 28px;
            color: #333;
        }
        .article li {
            margin-bottom: 8px;
        }
        .article .highlight-box {
            background: #fef9e7;
            border-left: 6px solid var(--accent);
            padding: 20px 24px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 24px 0;
        }
        .article .highlight-box strong {
            color: var(--primary);
        }
        .article .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .article .stat-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 20px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .article .stat-card i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .article .stat-card .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary);
        }
        .article .stat-card .label {
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .article .featured-image {
            margin: 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .article .featured-image img {
            width: 100%;
            object-fit: cover;
        }
        .article .featured-image figcaption {
            background: var(--secondary);
            color: #ddd;
            padding: 10px 16px;
            font-size: 0.9rem;
            text-align: center;
        }
        .search-box {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            margin-bottom: 32px;
        }
        .search-box h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 18px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
            outline: none;
        }
        .search-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.15);
        }
        .search-form button {
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-form button:hover {
            background: var(--primary-dark);
            transform: scale(1.02);
        }
        .interaction-section {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
            margin-top: 40px;
        }
        @media (min-width: 768px) {
            .interaction-section {
                grid-template-columns: 1fr 1fr;
            }
        }
        .interaction-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
        }
        .interaction-card h3 {
            font-size: 1.2rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 3px solid var(--primary);
            padding-bottom: 8px;
            display: inline-block;
        }
        .interaction-card form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .interaction-card input,
        .interaction-card textarea {
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            font-family: inherit;
            transition: var(--transition);
            outline: none;
            width: 100%;
        }
        .interaction-card input:focus,
        .interaction-card textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(211, 47, 47, 0.1);
        }
        .interaction-card textarea {
            min-height: 100px;
            resize: vertical;
        }
        .interaction-card button {
            padding: 12px 24px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .interaction-card button:hover {
            background: var(--primary-dark);
            transform: scale(1.02);
        }
        .star-rating {
            display: flex;
            gap: 6px;
            flex-direction: row-reverse;
            justify-content: flex-end;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover~label,
        .star-rating input:checked~label {
            color: var(--accent);
        }
        .site-footer {
            background: var(--secondary);
            color: #ccc;
            padding: 48px 0 24px;
            margin-top: 40px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
        }
        @media (min-width: 768px) {
            .footer-inner {
                grid-template-columns: 2fr 1fr 1fr;
            }
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 16px;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 6px;
            display: inline-block;
        }
        .site-footer a {
            color: #bbb;
        }
        .site-footer a:hover {
            color: var(--accent);
        }
        .site-footer .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            list-style: none;
        }
        .site-footer .friend-links li a {
            font-size: 0.9rem;
        }
        .site-footer .friend-links li a::before {
            content: "› ";
            color: var(--accent);
            font-weight: 700;
        }
        .copyright {
            text-align: center;
            padding-top: 24px;
            margin-top: 32px;
            border-top: 1px solid #444;
            font-size: 0.88rem;
            color: #888;
        }
        .copyright strong {
            color: #ddd;
        }
        @media (max-width: 767px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: #1a1a1a;
                padding: 16px;
                border-radius: var(--radius);
                margin-top: 8px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                border-bottom: 1px solid #333;
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .article {
                padding: 16px;
            }
            .article h2 {
                font-size: 1.4rem;
            }
            .article h3 {
                font-size: 1.15rem;
            }
            .breadcrumb ol {
                font-size: 0.8rem;
                gap: 4px 8px;
            }
            .sidebar {
                position: static;
            }
            .interaction-section {
                grid-template-columns: 1fr;
            }
            .star-rating label {
                font-size: 1.6rem;
            }
        }
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }
        ::selection {
            background: var(--primary);
            color: #fff;
        }
        friend-link {
            display: block;
        }