* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a2a6c;
            --secondary: #2d4a9e;
            --accent: #f9a826;
            --bg: #f4f7fc;
            --card-bg: #ffffff;
            --text: #1e1e2f;
            --text-light: #4a4a5a;
            --border: #dce3ed;
            --success: #2ecc71;
            --radius: 12px;
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            --transition: 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 1.05rem;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            display: block;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            background: rgba(255, 255, 255, 0.12);
            padding: 4px 18px;
            border-radius: 40px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: var(--transition);
        }
        .my-logo:hover {
            background: rgba(255, 255, 255, 0.22);
            text-decoration: none;
            color: #fff;
        }
        .my-logo span {
            color: var(--accent);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
        }
        .nav-list li a {
            color: #f0f4ff;
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 500;
            font-size: 0.9rem;
            transition: var(--transition);
            background: rgba(255, 255, 255, 0.07);
        }
        .nav-list li a:hover {
            background: var(--accent);
            color: #1e1e2f;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.6rem;
            background: none;
            border: none;
            color: #fff;
            cursor: pointer;
            padding: 4px 12px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .breadcrumb {
            background: transparent;
            padding: 12px 0 6px;
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--secondary);
        }
        .breadcrumb span {
            margin: 0 6px;
            color: #999;
        }
        main {
            padding: 30px 0 50px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 35px;
        }
        .article-body h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 12px;
        }
        .article-body h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 48px;
            margin-bottom: 16px;
            border-left: 5px solid var(--accent);
            padding-left: 18px;
        }
        .article-body h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--secondary);
            margin-top: 32px;
            margin-bottom: 12px;
        }
        .article-body h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text);
            margin-top: 24px;
            margin-bottom: 8px;
        }
        .article-body p {
            margin-bottom: 18px;
            color: var(--text-light);
        }
        .article-body strong {
            color: var(--text);
            font-weight: 600;
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0 20px 24px;
            color: var(--text-light);
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            padding: 14px 0 18px;
            border-bottom: 2px solid var(--border);
            margin-bottom: 24px;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .meta-info .updated {
            background: var(--accent);
            color: #1e1e2f;
            padding: 4px 14px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.8rem;
        }
        .featured-img {
            margin: 24px 0 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .featured-img img {
            width: 100%;
            max-height: 480px;
            object-fit: cover;
        }
        .featured-img figcaption {
            font-size: 0.85rem;
            color: var(--text-light);
            text-align: center;
            padding: 10px 0 0;
            font-style: italic;
        }
        .code-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 14px;
            margin: 20px 0 28px;
        }
        .code-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 16px 18px;
            box-shadow: var(--shadow);
            border-left: 4px solid var(--accent);
            transition: var(--transition);
        }
        .code-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
        }
        .code-card .code {
            font-family: 'Courier New', monospace;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary);
        }
        .code-card .reward {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .code-card .status {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.7rem;
            font-weight: 600;
            margin-top: 6px;
        }
        .status.active {
            background: #e8f8ef;
            color: #1b7a3d;
        }
        .status.expired {
            background: #fde8e8;
            color: #b33a3a;
        }
        .sidebar {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 20px;
            box-shadow: var(--shadow);
            position: sticky;
            top: 110px;
            align-self: start;
        }
        .sidebar h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar ul li {
            padding: 6px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar ul li a {
            font-size: 0.9rem;
        }
        .form-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 26px;
            box-shadow: var(--shadow);
            margin: 36px 0;
        }
        .form-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .form-card p {
            color: var(--text-light);
            margin-bottom: 18px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 0.9rem;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            transition: var(--transition);
            background: #fafcff;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--secondary);
            outline: none;
            box-shadow: 0 0 0 4px rgba(45, 74, 158, 0.1);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(26, 42, 108, 0.25);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e1e2f;
        }
        .btn-accent:hover {
            background: #e8950f;
            color: #1e1e2f;
        }
        .star-rating {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin: 8px 0 16px;
        }
        .star-rating i {
            transition: var(--transition);
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: var(--accent);
            transform: scale(1.1);
        }
        .site-footer {
            background: var(--primary);
            color: #cfd9f0;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        .site-footer .container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 12px;
        }
        .site-footer a {
            color: #b0c4f0;
        }
        .site-footer a:hover {
            color: var(--accent);
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 16px 20px;
            border-radius: var(--radius);
            margin: 10px 0;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
        }
        .copyright {
            text-align: center;
            padding-top: 24px;
            margin-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.85rem;
            color: #8899c0;
            grid-column: 1 / -1;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
                margin-top: 30px;
            }
            .article-body h1 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(255, 255, 255, 0.08);
                border-radius: var(--radius);
                padding: 12px;
                margin-top: 12px;
            }
            .nav-list.open {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .my-logo {
                font-size: 1.3rem;
                padding: 2px 14px;
            }
            .article-body h1 {
                font-size: 1.7rem;
            }
            .article-body h2 {
                font-size: 1.4rem;
            }
            .article-body h3 {
                font-size: 1.2rem;
            }
            .code-grid {
                grid-template-columns: 1fr 1fr;
            }
            .meta-info {
                flex-direction: column;
                gap: 10px;
                align-items: flex-start;
            }
            .form-card {
                padding: 20px 16px;
            }
            .site-footer .container {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .code-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 12px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }
        .highlight-box {
            background: #f0f6ff;
            border-radius: var(--radius);
            padding: 20px 24px;
            border-left: 5px solid var(--accent);
            margin: 24px 0;
        }
        .highlight-box p:last-child {
            margin-bottom: 0;
        }
        .table-wrap {
            overflow-x: auto;
            margin: 20px 0 28px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }
        table th {
            background: var(--primary);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
        }
        table td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--border);
        }
        table tr:hover td {
            background: #f0f4ff;
        }
        .tag {
            display: inline-block;
            background: var(--accent);
            color: #1e1e2f;
            padding: 2px 14px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-right: 4px;
        }