* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --secondary: #f39c12;
            --accent: #2ecc71;
            --bg: #fff8f0;
            --bg-card: #ffffff;
            --text: #2c3e50;
            --text-light: #7f8c8d;
            --border: #ecf0f1;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 16px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 16px;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #2c3e50 0%, #1a252f 100%);
            color: #fff;
            padding: 0 0 12px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 20px;
            max-width: 1140px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            background: var(--primary);
            padding: 4px 16px;
            border-radius: 40px;
            transition: var(--transition);
            display: inline-block;
        }
        .my-logo:hover {
            background: var(--primary-dark);
            transform: scale(1.02);
            color: #fff;
        }
        .my-logo span {
            color: var(--secondary);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 28px;
            height: 3px;
            background: #fff;
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }
        nav {
            display: flex;
            gap: 24px;
            align-items: center;
            flex-wrap: wrap;
        }
        nav a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
        }
        nav a:hover {
            color: #fff;
            border-bottom-color: var(--secondary);
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 40px;
            padding: 2px 2px 2px 16px;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .nav-search:focus-within {
            background: rgba(255, 255, 255, 0.2);
            border-color: var(--secondary);
        }
        .nav-search input {
            background: none;
            border: none;
            color: #fff;
            padding: 8px 4px;
            font-size: 0.9rem;
            outline: none;
            min-width: 120px;
        }
        .nav-search input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .nav-search button {
            background: var(--secondary);
            border: none;
            color: #1a252f;
            padding: 8px 18px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.85rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-search button:hover {
            background: #e67e22;
        }
        .breadcrumb {
            padding: 8px 20px;
            max-width: 1140px;
            margin: 0 auto;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.7);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            color: rgba(255, 255, 255, 0.4);
        }
        main {
            padding: 40px 0 60px;
        }
        .article-header {
            text-align: center;
            margin-bottom: 48px;
            padding: 20px 0 32px;
            border-bottom: 2px solid var(--border);
        }
        .article-header h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: #1a252f;
            margin-bottom: 16px;
        }
        .article-header h1 span {
            color: var(--primary);
        }
        .article-header .meta {
            color: var(--text-light);
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .article-header .meta i {
            margin-right: 6px;
        }
        .last-updated {
            background: var(--secondary);
            color: #1a252f;
            padding: 2px 14px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.85rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-main h2 {
            font-size: 2rem;
            font-weight: 700;
            margin: 48px 0 16px;
            color: #1a252f;
            border-left: 5px solid var(--primary);
            padding-left: 16px;
        }
        .content-main h2:first-of-type {
            margin-top: 0;
        }
        .content-main h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin: 32px 0 12px;
            color: #2c3e50;
        }
        .content-main h4 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 24px 0 8px;
            color: var(--primary-dark);
        }
        .content-main p {
            margin-bottom: 18px;
            color: #444;
        }
        .content-main ul,
        .content-main ol {
            margin: 0 0 20px 24px;
            color: #444;
        }
        .content-main li {
            margin-bottom: 8px;
        }
        .content-main blockquote {
            border-left: 4px solid var(--primary);
            background: #fdf2f0;
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            font-style: italic;
            color: #2c3e50;
        }
        .content-main blockquote strong {
            color: var(--primary-dark);
        }
        .highlight-box {
            background: linear-gradient(135deg, #fff3e0, #ffe0b2);
            border-radius: var(--radius);
            padding: 24px 28px;
            margin: 24px 0;
            border-left: 5px solid var(--secondary);
        }
        .highlight-box h4 {
            margin-top: 0;
        }
        .feature-image {
            margin: 32px 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .feature-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .feature-image figcaption {
            background: #fff;
            padding: 12px 20px;
            font-size: 0.9rem;
            color: var(--text-light);
            text-align: center;
            border-top: 1px solid var(--border);
        }
        .sidebar {
            position: sticky;
            top: 100px;
            align-self: start;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            margin-bottom: 24px;
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            margin-bottom: 16px;
            color: #1a252f;
            border-bottom: 2px solid var(--secondary);
            padding-bottom: 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 a {
            font-size: 0.92rem;
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .form-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            margin: 40px 0;
            border: 1px solid var(--border);
        }
        .form-card h3 {
            font-size: 1.6rem;
            margin-bottom: 8px;
            color: #1a252f;
        }
        .form-card p {
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.92rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 1rem;
            font-family: var(--font);
            transition: var(--transition);
            background: #fafafa;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--primary);
            outline: none;
            background: #fff;
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .btn {
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border: none;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(231, 76, 60, 0.3);
        }
        .btn-secondary {
            background: var(--secondary);
            color: #1a252f;
        }
        .btn-secondary:hover {
            background: #e67e22;
            box-shadow: 0 8px 24px rgba(243, 156, 18, 0.3);
        }
        .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(--secondary);
        }
        .comment-item {
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
            display: flex;
            gap: 16px;
        }
        .comment-item:last-child {
            border-bottom: none;
        }
        .comment-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .comment-body h4 {
            font-size: 1rem;
            margin-bottom: 2px;
        }
        .comment-body .time {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .comment-body p {
            margin-top: 6px;
            color: #444;
        }
        footer {
            background: #1a252f;
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 32px;
            margin-top: 60px;
        }
        footer .container {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        footer h4 {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 16px;
        }
        footer a {
            color: rgba(255, 255, 255, 0.7);
        }
        footer a:hover {
            color: var(--secondary);
        }
        footer ul {
            list-style: none;
            padding: 0;
        }
        footer ul li {
            padding: 4px 0;
        }
        .footer-copyright {
            grid-column: 1 / -1;
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 32px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
        }
        friend-link {
            display: block;
            margin-top: 12px;
            font-size: 0.92rem;
        }
        friend-link a {
            display: inline-block;
            margin: 0 8px 4px 0;
            padding: 2px 12px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 40px;
        }
        friend-link a:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        @media(max-width:992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            footer .container {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media(max-width:768px) {
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.4rem;
                padding: 2px 14px;
            }
            .hamburger {
                display: flex;
            }
            nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 12px;
                padding: 16px 0 8px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                margin-top: 12px;
            }
            nav.open {
                display: flex;
            }
            nav a {
                font-size: 1.05rem;
            }
            .nav-search {
                width: 100%;
            }
            .nav-search input {
                flex: 1;
                min-width: 0;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .article-header .meta {
                font-size: 0.85rem;
                gap: 10px;
            }
            .content-main h2 {
                font-size: 1.6rem;
            }
            .content-main h3 {
                font-size: 1.3rem;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
            .sidebar {
                grid-template-columns: 1fr;
            }
            footer .container {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .form-card {
                padding: 20px;
            }
        }
        @media(max-width:480px) {
            .article-header h1 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 12px;
            }
            .breadcrumb {
                font-size: 0.75rem;
                padding: 6px 12px;
            }
            .btn {
                padding: 10px 24px;
                font-size: 0.9rem;
            }
            .star-rating label {
                font-size: 1.6rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .gap-8 {
            gap: 8px;
        }
        .tag {
            display: inline-block;
            background: var(--secondary);
            color: #1a252f;
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .tag-green {
            background: var(--accent);
            color: #fff;
        }
        .tag-blue {
            background: #3498db;
            color: #fff;
        }