*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #f5a623;
            --primary-dark: #d48c1a;
            --secondary: #4a90d9;
            --accent: #7ed321;
            --bg: #fafaf5;
            --card-bg: #ffffff;
            --text: #1a1a2e;
            --text-light: #555;
            --border: #e8e8e0;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --radius: 16px;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1120px;
            --header-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.25s;
        }
        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 20px;
        }
        header {
            background: var(--header-bg);
            color: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: var(--max-width);
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--primary), #ffd57a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .my-logo i {
            -webkit-text-fill-color: var(--primary);
            font-size: 1.6rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 14px;
            border-radius: 8px;
            cursor: pointer;
            transition: 0.2s;
        }
        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .nav-menu {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
        }
        .nav-menu a {
            color: #eee;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: 0.25s;
            white-space: nowrap;
        }
        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--primary);
            text-decoration: none;
        }
        .nav-menu a.active {
            background: var(--primary);
            color: #1a1a2e;
        }
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 10px 0;
            font-size: 0.85rem;
        }
        .breadcrumb-wrap .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 4px;
        }
        .breadcrumb-wrap a {
            color: var(--text-light);
        }
        .breadcrumb-wrap a:hover {
            color: var(--secondary);
        }
        .breadcrumb-wrap span {
            color: var(--text-light);
        }
        .breadcrumb-wrap .sep {
            margin: 0 4px;
            color: #aaa;
        }
        .hero {
            background: linear-gradient(135deg, #1a1a2e 0%, #2d2d5e 100%);
            color: #fff;
            padding: 50px 0 40px;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .hero h1 i {
            color: var(--primary);
            margin-right: 8px;
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 720px;
            margin: 0 auto 10px;
            opacity: 0.85;
        }
        .hero .meta {
            font-size: 0.9rem;
            opacity: 0.7;
            margin-top: 12px;
        }
        .hero .meta i {
            margin-right: 6px;
        }
        main {
            padding: 40px 0 60px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-body {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 36px 32px;
            box-shadow: var(--shadow);
        }
        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 48px 0 16px;
            padding-bottom: 8px;
            border-bottom: 3px solid var(--primary);
            color: #1a1a2e;
        }
        .article-body h2:first-child {
            margin-top: 0;
        }
        .article-body h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin: 32px 0 12px;
            color: #2d2d5e;
        }
        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 24px 0 8px;
            color: #444;
        }
        .article-body p {
            margin-bottom: 18px;
            color: var(--text);
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: #fef9ee;
            padding: 16px 22px;
            margin: 24px 0;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #444;
        }
        .article-body .feature-img {
            margin: 28px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .article-body .feature-img figcaption {
            background: #f5f3ee;
            padding: 10px 16px;
            font-size: 0.85rem;
            color: var(--text-light);
            text-align: center;
        }
        .highlight {
            background: #fff8e1;
            padding: 0 4px;
            border-radius: 4px;
        }
        .emoji-lg {
            font-size: 1.3rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: #1a1a2e;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card ul li {
            padding: 6px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            font-size: 0.92rem;
        }
        .search-form {
            display: flex;
            gap: 8px;
            margin-top: 6px;
        }
        .search-form input {
            flex: 1;
            padding: 10px 16px;
            border: 2px solid var(--border);
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: 0.2s;
        }
        .search-form input:focus {
            border-color: var(--secondary);
        }
        .search-form button {
            background: var(--secondary);
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 0 20px;
            font-size: 1rem;
            cursor: pointer;
            transition: 0.2s;
        }
        .search-form button:hover {
            background: #3a7bc8;
        }
        .feedback-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 2px solid var(--border);
        }
        .feedback-card {
            background: #f9f8f4;
            border-radius: var(--radius);
            padding: 24px 22px;
        }
        .feedback-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feedback-card textarea,
        .feedback-card input {
            width: 100%;
            padding: 10px 14px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: var(--font);
            outline: none;
            transition: 0.2s;
            resize: vertical;
            margin-bottom: 10px;
        }
        .feedback-card textarea:focus,
        .feedback-card input:focus {
            border-color: var(--secondary);
        }
        .feedback-card .btn {
            background: var(--primary);
            color: #1a1a2e;
            font-weight: 600;
            border: none;
            padding: 10px 28px;
            border-radius: 30px;
            cursor: pointer;
            transition: 0.2s;
            font-size: 0.95rem;
        }
        .feedback-card .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            gap: 4px;
            margin: 8px 0 12px;
            font-size: 1.6rem;
            color: #ddd;
            cursor: pointer;
        }
        .star-rating i {
            transition: 0.2s;
        }
        .star-rating i.active,
        .star-rating i:hover {
            color: var(--primary);
        }
        footer {
            background: var(--header-bg);
            color: #ccc;
            padding: 40px 0 20px;
            margin-top: 20px;
        }
        footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 30px;
        }
        footer h4 {
            color: #fff;
            font-size: 1.05rem;
            margin-bottom: 12px;
        }
        footer a {
            color: #bbb;
        }
        footer a:hover {
            color: var(--primary);
        }
        footer .footer-links {
            list-style: none;
            padding: 0;
        }
        footer .footer-links li {
            padding: 4px 0;
        }
        footer .copyright {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: #888;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 10px;
            padding: 14px 16px;
            margin-top: 6px;
            font-size: 0.9rem;
        }
        friend-link a {
            display: inline-block;
            margin-right: 16px;
            padding: 2px 0;
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: 2;
            }
            footer .container {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .feedback-section {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 640px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                padding-top: 12px;
                gap: 4px;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .header-inner {
                padding: 12px 16px;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .article-body {
                padding: 20px 16px;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            footer .container {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feedback-card {
                padding: 16px;
            }
            .sidebar-card {
                padding: 16px;
            }
            .breadcrumb-wrap {
                font-size: 0.75rem;
            }
        }
        .scroll-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            background: var(--primary);
            color: #1a1a2e;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            cursor: pointer;
            transition: 0.3s;
            border: none;
            z-index: 99;
        }
        .scroll-top:hover {
            transform: translateY(-4px);
            background: var(--primary-dark);
        }
        @media print {
            .nav-toggle,
            .scroll-top,
            .search-form,
            .feedback-section {
                display: none !important;
            }
            header {
                position: static;
            }
        }